Pathological Liar Test: Free Self-Assessment & Expert Guide

Defining Pseudologia Fantastica

Pathological lying, clinically termed pseudologia fantastica, is a chronic behavioral pattern characterized by habitual, compulsive lying that goes far beyond ordinary dishonesty. The term was first coined by German psychiatrist Anton Delbrück in 1891 after he observed patients whose lies were so abnormal and disproportionate to reality that they could not be classified within any existing disorder [1]Verified Pseudologia Fantastica in the Emergency Department: A Case Report and Review of the Literature
Confirms Anton Delbrück coined pseudologia fantastica in 1891 and describes key clinical characteristics of the condition [2]Verified Pseudologia Fantastica: What is Known and What Needs to be Understood
Confirms Delbrück's 1891 observations and provides comprehensive review of key characteristics of pseudologia fantastica. Delbrück described patients who told complex tales where delusions seemed to coexist with lies, providing the foundational framework for understanding this distinct form of deception [1]Verified Pseudologia Fantastica in the Emergency Department: A Case Report and Review of the Literature
Confirms Anton Delbrück coined pseudologia fantastica in 1891 and describes key clinical characteristics of the condition.

Curtis and Hart (2020) formally defined pathological lying as "a persistent, pervasive, and often compulsive pattern of excessive lying behavior that leads to clinically significant impairment of functioning in social, occupational, or other areas; causes marked distress; poses a risk to the self or others; and occurs for longer than 6 months" [3]Verified Pathological Lying: Theoretical and Empirical Support for a Diagnostic Entity
Confirms pathological lying prevalence of 8-13%, with 13% of 623 participants self-identifying as pathological liars, and provides empirical support for PL as a diagnostic entity. This definition has become a cornerstone of modern research on the condition. For a deeper exploration of this condition, see our guide to understanding pathological liars.

What distinguishes pathological lying from everyday dishonesty is its pervasive, persistent nature. While most people tell occasional white lies or exaggerate certain facts, pathological liars engage in deception as a default mode of communication. Their lies are frequently elaborate, internally consistent enough to be believable, and delivered with remarkable confidence. The lies often contain a kernel of truth, making them particularly difficult for others to identify [4]Verified Pseudologia Fantastica - StatPearls
Confirms PF is not recognized as a distinct diagnostic entity, treatment includes CBT and medications, and neurobiological dysfunction in prefrontal cortex is implicated.

It is important to note that pseudologia fantastica is not recognized as a distinct diagnostic entity within current classification systems including the DSM-5 [4]Verified Pseudologia Fantastica - StatPearls
Confirms PF is not recognized as a distinct diagnostic entity, treatment includes CBT and medications, and neurobiological dysfunction in prefrontal cortex is implicated [5]Verified Pathological lying - Wikipedia
Confirms pathological lying is listed in DSM-5 as a symptom of other disorders, not standalone, and first described in 1891 by Anton Delbrück. However, pathological lying is listed as a symptom of other disorders such as antisocial, narcissistic, and histrionic personality disorders [5]Verified Pathological lying - Wikipedia
Confirms pathological lying is listed in DSM-5 as a symptom of other disorders, not standalone, and first described in 1891 by Anton Delbrück. The condition also appears in the DSM-5 alternative model of personality disorder, where "Deceitfulness" is an aspect of the Antagonism domain [5]Verified Pathological lying - Wikipedia
Confirms pathological lying is listed in DSM-5 as a symptom of other disorders, not standalone, and first described in 1891 by Anton Delbrück. Research by Curtis and Hart provides strong empirical support for establishing pathological lying as its own diagnostic entity [3]Verified Pathological Lying: Theoretical and Empirical Support for a Diagnostic Entity
Confirms pathological lying prevalence of 8-13%, with 13% of 623 participants self-identifying as pathological liars, and provides empirical support for PL as a diagnostic entity.

Key Characteristics of Pathological Liars

Clinical observations and research have identified several hallmark characteristics that distinguish pathological liars from other types of dishonest individuals [4]Verified Pseudologia Fantastica - StatPearls
Confirms PF is not recognized as a distinct diagnostic entity, treatment includes CBT and medications, and neurobiological dysfunction in prefrontal cortex is implicated [6]Verified Pseudologia Fantastica in the Emergency Department: A Case Report and Review of the Literature
Confirms key characteristics of pseudologia fantastica including lies featuring the pseudologue as hero or victim and lying on a spectrum between deceit and delusion:

Chronic and habitual: The lying is persistent and occurs across virtually all areas of life, not limited to specific situations or triggers. Pathological liars in Curtis and Hart's study reported telling an average of 10 lies per day and had been doing so for longer than six months [3]Verified Pathological Lying: Theoretical and Empirical Support for a Diagnostic Entity
Confirms pathological lying prevalence of 8-13%, with 13% of 623 participants self-identifying as pathological liars, and provides empirical support for PL as a diagnostic entity.

Disproportionate to circumstances: Pathological liars fabricate stories even when the truth would be equally acceptable or even more beneficial. The lies are described as "disproportionate falsifications that may be extensive and complicated, present over a period of years or a lifetime" [6]Verified Pseudologia Fantastica in the Emergency Department: A Case Report and Review of the Literature
Confirms key characteristics of pseudologia fantastica including lies featuring the pseudologue as hero or victim and lying on a spectrum between deceit and delusion.

Internally motivated: Unlike strategic liars who deceive for specific gains, pathological liars often lie for internal psychological reasons they may not fully understand themselves. Research shows the lying often reduces anxiety and feels compulsive [3]Verified Pathological Lying: Theoretical and Empirical Support for a Diagnostic Entity
Confirms pathological lying prevalence of 8-13%, with 13% of 623 participants self-identifying as pathological liars, and provides empirical support for PL as a diagnostic entity.

Partially self-believed: Some pathological liars come to genuinely believe portions of their fabrications, blurring the line between conscious deception and self-delusion. The pseudologue "lies somewhere along a spectrum between conscious deceit and delusion" [6]Verified Pseudologia Fantastica in the Emergency Department: A Case Report and Review of the Literature
Confirms key characteristics of pseudologia fantastica including lies featuring the pseudologue as hero or victim and lying on a spectrum between deceit and delusion.

Grandiose in nature: The lies frequently cast the liar in a favorable, heroic, or victimized light, serving ego-protective functions [6]Verified Pseudologia Fantastica in the Emergency Department: A Case Report and Review of the Literature
Confirms key characteristics of pseudologia fantastica including lies featuring the pseudologue as hero or victim and lying on a spectrum between deceit and delusion. To understand the connection between narcissism and deception, see our guide to the narcissistic liar.

Resistant to confrontation: When caught, pathological liars typically double down, create additional lies, or become defensive rather than acknowledging the deception. Their lies tend to grow from an initial lie, creating increasingly complex webs of deception [3]Verified Pathological Lying: Theoretical and Empirical Support for a Diagnostic Entity
Confirms pathological lying prevalence of 8-13%, with 13% of 623 participants self-identifying as pathological liars, and provides empirical support for PL as a diagnostic entity.

For more on why this pattern persists, read why pathological liars keep lying.

Understanding When Self-Assessment Is Appropriate

This pathological liar test is designed as a preliminary self-reflection tool, not a diagnostic instrument. It can be valuable in several contexts:

If you have noticed a pattern of lying that feels automatic or difficult to control, this assessment can help you quantify and categorize your tendencies. Curtis and Hart's research found that pathological liars often reported their lying was "out of their control" and done "for no apparent reason" [3]Verified Pathological Lying: Theoretical and Empirical Support for a Diagnostic Entity
Confirms pathological lying prevalence of 8-13%, with 13% of 623 participants self-identifying as pathological liars, and provides empirical support for PL as a diagnostic entity. Many people who lie frequently do not realize the extent of their behavior until they engage in structured self-reflection.

If loved ones have repeatedly expressed concern about your truthfulness, taking this assessment can provide a structured framework for honest self-evaluation. Research indicates that 91% of people report having had contact with someone they believed to be a pathological liar [7]Verified Have You Ever Met a Pathological Liar?
Confirms 91% of respondents believed they had contact with a pathological liar, and that about 5% of people tell half of all lies.

For those who suspect a partner, family member, or close friend may be a pathological liar, reviewing the assessment questions can help you recognize behavioral patterns. If you are dealing with gaslighting in a relationship, understanding deception patterns can be particularly valuable.

Mental health professionals may find this assessment useful as a conversation starter with clients. A survey of 295 psychotherapists found that most had clinical experience with patients exhibiting pathological lying, though such patients made up a small proportion of their caseloads [8]Verified Pathological Lying: Psychotherapists' Experiences and Ability to Diagnose
Confirms 73% of surveyed psychotherapists recommend CBT for pathological lying and that 56% of PL patients were diagnosed with personality disorders. For clinical guidance, see our therapist's guide to requesting a client polygraph.

If you are preparing for a private lie detector test and are concerned about your own honesty patterns, understanding your tendencies beforehand can help you approach the examination with greater self-awareness.

Neurological Foundations

Research has revealed fascinating neurological underpinnings of pathological lying. A landmark 2005 study by Yaling Yang and colleagues at the University of Southern California found that pathological liars showed a 22-26% increase in prefrontal white matter and a 36-42% reduction in prefrontal grey/white ratios compared with both antisocial controls and normal controls [9]Verified Prefrontal white matter in pathological liars
Confirms pathological liars showed 22-26% increase in prefrontal white matter and 36-42% reduction in grey/white ratios compared with controls. Specifically, liars had a 25.7% increase in prefrontal white matter compared to antisocial controls and a 22.2% increase compared to normal controls [9]Verified Prefrontal white matter in pathological liars
Confirms pathological liars showed 22-26% increase in prefrontal white matter and 36-42% reduction in grey/white ratios compared with controls.

A follow-up 2007 study by the same team localized these increases to specific prefrontal subregions: the orbitofrontal cortex (22-26% increase), inferior frontal cortex (32-36% increase), and middle frontal cortex (28-32% increase) compared with both antisocial and normal controls [10]Verified Localisation of increased prefrontal white matter in pathological liars
Confirms 22-26% increase in orbitofrontal cortex, 32-36% in inferior frontal cortex, and 28-32% in middle frontal cortex white matter in pathological liars. This widespread increase in white matter — the myelinated nerve fibers that facilitate rapid neural connections — may give pathological liars enhanced cognitive connectivity that makes fabrication easier and more natural [10]Verified Localisation of increased prefrontal white matter in pathological liars
Confirms 22-26% increase in orbitofrontal cortex, 32-36% in inferior frontal cortex, and 28-32% in middle frontal cortex white matter in pathological liars.

The prefrontal cortex governs executive functions including decision-making, impulse control, and social behavior. Functional MRI studies have shown that lying activates different brain regions than truthful responses, requiring more cognitive resources. For most people, this additional cognitive load makes lying harder and more detectable. Pathological liars, however, may have neural pathways that reduce this cognitive burden, making deception feel as natural as truth-telling [9]Verified Prefrontal white matter in pathological liars
Confirms pathological liars showed 22-26% increase in prefrontal white matter and 36-42% reduction in grey/white ratios compared with controls [10]Verified Localisation of increased prefrontal white matter in pathological liars
Confirms 22-26% increase in orbitofrontal cortex, 32-36% in inferior frontal cortex, and 28-32% in middle frontal cortex white matter in pathological liars. These neurological differences are consistent with research on physiological responses when lying.

Recent research on pathological lying in adolescents has also found an association with executive functioning deficits, such as poor memory and impulse control, suggesting that treatments centered around executive functioning (including CBT and Habit-Reversal Training) may be effective [11]Verified Executive Functioning and Pathological Lying in Adolescence: Examining Prevalence and Etiology
Confirms association between pathological lying and executive function deficits in adolescents, with pathological liars reporting 9.6 lies per day.

Psychological Mechanisms

From a psychological perspective, pathological lying involves several interacting mechanisms:

Ego protection: Many pathological liars developed lying as a childhood coping mechanism to protect themselves from criticism, abuse, or feelings of inadequacy. Multiple case reports confirm that pathological lying is prevalent in individuals with a fragile sense of self and low self-esteem [4]Verified Pseudologia Fantastica - StatPearls
Confirms PF is not recognized as a distinct diagnostic entity, treatment includes CBT and medications, and neurobiological dysfunction in prefrontal cortex is implicated. The psychoanalyst Helene Deutsch conceptualized pseudologia fantastica as an unconscious attempt to improve self-esteem and promote others' admiration [12]Verified Lying and Pseudologia Fantastica
Confirms Deutsch's conceptualization of pseudologia fantastica as an unconscious attempt to improve self-esteem, with onset at age 16 and discovery at 22. Understanding how childhood experiences shape deceptive behavior is explored in our guide on whether lying is a sign of childhood trauma.

Dopamine reward: Successfully deceiving others can trigger dopamine release, creating a neurochemical reward that reinforces lying behavior. Research has shown that repeated lying leads to decreased amygdala activation, meaning people feel less anxious and become more inclined to lie over time [13]Verified George Santos and The Science of Pathological Lying
Confirms Curtis and Hart's finding that 13% of participants identified as pathological liars, and that repeated lying decreases amygdala activation over time.

Identity construction: Pathological liars often use fabrication to construct and maintain an idealized self-image. Deutsch referred to the pathological lie as "a daydream communicated as reality" [12]Verified Lying and Pseudologia Fantastica
Confirms Deutsch's conceptualization of pseudologia fantastica as an unconscious attempt to improve self-esteem, with onset at age 16 and discovery at 22. Their lies become scaffolding for an identity they wish were real.

Emotional regulation: Curtis and Hart found that individuals in the pathological lying group indicated that telling lies reduced their anxiety [3]Verified Pathological Lying: Theoretical and Empirical Support for a Diagnostic Entity
Confirms pathological lying prevalence of 8-13%, with 13% of 623 participants self-identifying as pathological liars, and provides empirical support for PL as a diagnostic entity. Lying can serve as a method of managing overwhelming emotions, avoiding uncomfortable truths, or maintaining a sense of control. Research on deceptive strategies shows liars overwhelmingly base their deceptive reports on previously experienced events [14]Verified Exploring liars' strategies for creating deceptive reports
Confirms liars overwhelmingly base deceptive reports on previously experienced events — 67% in Study 1 and 86% in Study 2.

Understanding these mechanisms is crucial because they inform treatment approaches. Effective therapy for pathological lying addresses the underlying psychological needs that lying fulfills, rather than simply attempting to suppress the behavior.

Prevalence and Demographics

Estimating the prevalence of pathological lying is challenging because the condition itself makes reliable self-reporting difficult. However, the most robust research provides important data:

Curtis and Hart's 2020 study, published in Psychiatric Research and Clinical Practice, found that pathological lying has a prevalence of 8-13% [3]Verified Pathological Lying: Theoretical and Empirical Support for a Diagnostic Entity
Confirms pathological lying prevalence of 8-13%, with 13% of 623 participants self-identifying as pathological liars, and provides empirical support for PL as a diagnostic entity. In their study of 623 participants, 13% indicated that they self-identified or that others had identified them as pathological liars, defined as telling numerous lies each day for longer than six months [3]Verified Pathological Lying: Theoretical and Empirical Support for a Diagnostic Entity
Confirms pathological lying prevalence of 8-13%, with 13% of 623 participants self-identifying as pathological liars, and provides empirical support for PL as a diagnostic entity. The researchers acknowledged that their recruitment from mental health forums may have resulted in a slightly larger prevalence than the general population [3]Verified Pathological Lying: Theoretical and Empirical Support for a Diagnostic Entity
Confirms pathological lying prevalence of 8-13%, with 13% of 623 participants self-identifying as pathological liars, and provides empirical support for PL as a diagnostic entity.

The general population prevalence of clinically significant pseudologia fantastica remains formally unknown [15]Verified Pathological Lying: Symptom or Disease?
Confirms that general population prevalence of pathological lying is unknown, and that a study of 1,000 juvenile offenders found close to 1% prevalence; King and Ford review showed equal sex ratio. An early study of 1,000 repeat juvenile offenders found a prevalence of close to 1% [15]Verified Pathological Lying: Symptom or Disease?
Confirms that general population prevalence of pathological lying is unknown, and that a study of 1,000 juvenile offenders found close to 1% prevalence; King and Ford review showed equal sex ratio. Separate research by Hart found that about 5% of people tell half of all lies, and these prolific liars are often referred to as pathological, compulsive, or habitual liars [7]Verified Have You Ever Met a Pathological Liar?
Confirms 91% of respondents believed they had contact with a pathological liar, and that about 5% of people tell half of all lies.

A review of 72 documented case reports by King and Ford (1988) found that the average age of onset was 16 years and the average age of discovery was 22 [15]Verified Pathological Lying: Symptom or Disease?
Confirms that general population prevalence of pathological lying is unknown, and that a study of 1,000 juvenile offenders found close to 1% prevalence; King and Ford review showed equal sex ratio. The same review showed the sex ratio to be approximately equal [15]Verified Pathological Lying: Symptom or Disease?
Confirms that general population prevalence of pathological lying is unknown, and that a study of 1,000 juvenile offenders found close to 1% prevalence; King and Ford review showed equal sex ratio [16]Verified Pseudologia Fantastica (Pathological Lying) Demographics
Confirms conflicting research on gender prevalence in PF, with some studies showing equal rates and others suggesting male predominance. Some studies on general deception suggest a slight male predominance in lying behavior overall [17]Verified Face-to-Face Lying: Gender and Motivation to Deceive
Confirms that men tend to lie more than women in experimental deception research, with significant gender effects on lying behavior, though research on pathological lying specifically regarding gender remains conflicting [16]Verified Pseudologia Fantastica (Pathological Lying) Demographics
Confirms conflicting research on gender prevalence in PF, with some studies showing equal rates and others suggesting male predominance. The onset of pathological lying most commonly occurs during adolescence and the condition tends to be chronic without intervention [3]Verified Pathological Lying: Theoretical and Empirical Support for a Diagnostic Entity
Confirms pathological lying prevalence of 8-13%, with 13% of 623 participants self-identifying as pathological liars, and provides empirical support for PL as a diagnostic entity [11]Verified Executive Functioning and Pathological Lying in Adolescence: Examining Prevalence and Etiology
Confirms association between pathological lying and executive function deficits in adolescents, with pathological liars reporting 9.6 lies per day.

Before You Begin: Important Guidelines

This assessment consists of 24 questions organized into 8 behavioral categories. For this test to be meaningful, the most important requirement is radical honesty with yourself. This is a private self-reflection exercise — no one else needs to see your answers. The more truthful you are, the more useful the results will be.

Rate each statement using the following scale:

Strongly Agree (4 points): This describes me very accurately Agree (3 points): This describes me most of the time Neutral (2 points): I'm unsure or this sometimes applies Disagree (1 point): This rarely describes me Strongly Disagree (0 points): This does not describe me at all

Take your time with each question. Consider your behavior patterns over the past 12 months rather than isolated incidents. Everyone lies occasionally — this assessment looks for persistent patterns, not one-time occurrences.

Category 1: Frequency of Lying

This category examines how often lying occurs in your daily life and whether it has become a habitual pattern rather than a situational response. Research shows pathological liars report telling an average of 10 lies per day [3]Verified Pathological Lying: Theoretical and Empirical Support for a Diagnostic Entity
Confirms pathological lying prevalence of 8-13%, with 13% of 623 participants self-identifying as pathological liars, and provides empirical support for PL as a diagnostic entity.

1. I lie frequently, even when there is no apparent benefit to doing so. Consider whether you fabricate information in casual conversations, professional settings, or personal interactions even when the truth would serve you equally well.

2. I often tell lies about trivial, inconsequential matters. Think about whether you find yourself inventing details about small things — what you ate for lunch, where you were, or minor personal details — for no clear reason.

3. Lying has become an automatic habit that I engage in without conscious decision. Reflect on whether lies emerge spontaneously before you even consider telling the truth, as if deception is your default mode of communication.

Category 2: Ease of Lying

This category assesses how naturally and comfortably you engage in deception. Research on unanticipated questions in deception detection demonstrates that liars who find lying easy can still be detected through strategic questioning techniques [18]Verified Outsmarting the liars: The benefit of asking unanticipated questions
Confirms unanticipated questions enabled correct classification of up to 80% of liar and truth-teller pairs.

4. I find it easy to lie without feeling guilty or uncomfortable. Most people experience some degree of guilt, anxiety, or discomfort when lying. Consider whether lying feels emotionally neutral or even pleasurable to you.

5. I can lie convincingly without much effort or preparation. Think about whether you can fabricate detailed, believable stories on the spot without needing time to construct them.

6. I often lie spontaneously without planning or intending to beforehand. Assess whether lies emerge reflexively in conversation, surprising even yourself with what comes out of your mouth.

Category 3: Motivations for Lying

Understanding why you lie reveals whether your motivations align with pathological patterns versus situational dishonesty. Curtis and Hart's research found that pathological lying often involves telling lies without a specific reason, with lies growing from an initial lie [3]Verified Pathological Lying: Theoretical and Empirical Support for a Diagnostic Entity
Confirms pathological lying prevalence of 8-13%, with 13% of 623 participants self-identifying as pathological liars, and provides empirical support for PL as a diagnostic entity.

7. I lie to make myself look better, more accomplished, or more interesting. Consider whether you exaggerate achievements, fabricate experiences, or embellish your background to impress others.

8. I lie to avoid consequences, accountability, or trouble. Reflect on whether deception is your primary strategy for avoiding negative outcomes, even when honesty would be more appropriate.

9. I lie to gain sympathy, attention, or emotional support from others. Think about whether you fabricate or exaggerate problems, illnesses, or hardships to elicit concern from those around you.

Category 4: Impact on Relationships

Pathological lying almost always damages interpersonal relationships. Research shows that the most common negative consequences for pathological liars are poor emotional and social outcomes, including being ostracised or having tumultuous relationships [7]Verified Have You Ever Met a Pathological Liar?
Confirms 91% of respondents believed they had contact with a pathological liar, and that about 5% of people tell half of all lies.

10. My lies have caused significant problems in my personal relationships. Consider arguments, conflicts, trust breakdowns, or emotional distance that resulted directly from dishonesty.

11. People close to me frequently catch me lying or question my truthfulness. Think about how often partners, friends, family members, or colleagues have confronted you about dishonesty. Research shows that careless liars are often caught due to inconsistencies.

12. I have lost friendships or seriously damaged relationships because of my lies. Reflect on whether lies have been the direct or primary cause of relationship endings or severe deterioration.

Category 5: Self-Awareness of Lying

This category explores your level of insight into your own lying behavior, including whether you can recognize and control it.

13. I sometimes lie without realizing it until after the fact. Consider whether you have moments of recognition where you realize you just told a lie without conscious intent.

14. I am aware that I lie frequently but cannot seem to stop the behavior. Reflect on whether you have tried to reduce your lying but find it difficult or impossible to maintain honesty consistently. Curtis and Hart found that pathological liars reported their lying behavior was "out of their control" [3]Verified Pathological Lying: Theoretical and Empirical Support for a Diagnostic Entity
Confirms pathological lying prevalence of 8-13%, with 13% of 623 participants self-identifying as pathological liars, and provides empirical support for PL as a diagnostic entity.

15. I often rationalize or justify my lies to myself with internal excuses. Think about whether you create mental narratives that make your lying seem reasonable, necessary, or harmless.

Category 6: Lying as a Defense Mechanism

For many pathological liars, dishonesty serves as a psychological shield against vulnerability, criticism, or uncomfortable truths about themselves. Research by Fisher (2013) shows that liars overwhelmingly base their deceptive reports on previously experienced events — 67% in one study and 86% in another [14]Verified Exploring liars' strategies for creating deceptive reports
Confirms liars overwhelmingly base deceptive reports on previously experienced events — 67% in Study 1 and 86% in Study 2.

16. I lie to protect myself from criticism, judgment, or negative evaluation. Consider whether your default response to potential criticism is to fabricate stories that deflect blame or present you more favorably.

17. I lie to hide my insecurities, weaknesses, or perceived inadequacies. Reflect on whether you create false narratives to conceal aspects of yourself that you feel ashamed about or fear others would reject.

18. I lie to avoid facing uncomfortable truths about myself or my life. Think about whether deception helps you maintain a version of reality that is more comfortable than the truth. For perspectives on the moral dimensions of lying, see is lying a sin?.

Category 7: Consequences of Lying

This category examines the practical, real-world consequences your lying behavior has generated.

19. I have faced significant real-world consequences because of my lies. Consider whether lying has led to job loss, legal problems, financial difficulties, or other tangible negative outcomes. Curtis and Hart found that pathological liars reported greater impaired functioning across multiple life domains [3]Verified Pathological Lying: Theoretical and Empirical Support for a Diagnostic Entity
Confirms pathological lying prevalence of 8-13%, with 13% of 623 participants self-identifying as pathological liars, and provides empirical support for PL as a diagnostic entity.

20. My lies have created complicated situations that I struggle to manage or untangle. Reflect on whether you have found yourself trapped in webs of deception that require additional lies to maintain. Research on verifiable details in deception shows that liars include fewer verifiable details, making their stories eventually harder to sustain [19]Verified Exploiting liars' verbal strategies by examining the verifiability of details
Confirms liars include fewer verifiable details than truth-tellers, with 79% accuracy in classification based on verifiable detail frequency.

21. I have difficulty remembering my lies, leading to contradictions others notice. Think about whether keeping track of your fabrications has become cognitively challenging, resulting in inconsistencies.

Category 8: Regret, Remorse, and Desire to Change

This final category assesses your emotional response to lying and your motivation for change. These questions can also indicate the degree to which empathy is intact.

22. I often regret lying after the fact and wish I had been honest. Consider whether you experience retrospective remorse about your dishonesty, even if you could not stop yourself in the moment.

23. I feel genuine remorse when my lies hurt or betray other people. Reflect on whether the impact of your lies on others causes you emotional pain, guilt, or distress. Curtis and Hart's research indicates that pathological liars do experience remorse, which distinguishes them from psychopathic liars [13]Verified George Santos and The Science of Pathological Lying
Confirms Curtis and Hart's finding that 13% of participants identified as pathological liars, and that repeated lying decreases amygdala activation over time.

24. I genuinely want to stop lying but find it extremely challenging to do so. Think about whether you have a sincere desire to change your behavior but feel unable to achieve consistent honesty on your own.

How to Calculate Your Score

Add up the point values for all 24 questions using the following scale:

Strongly Agree: 4 points Agree: 3 points Neutral: 2 points Disagree: 1 point Strongly Disagree: 0 points

Your total score will fall between 0 and 96 points. The score ranges below are based on the distribution of responses across the 8 behavioral categories and provide a general indication of where your lying tendencies fall on the spectrum.

Score Interpretation Ranges

Score 0-24: Low Likelihood of Pathological Lying. Your responses suggest normal or below-average lying tendencies. Everyone is occasionally dishonest, and your behavior falls within typical ranges. Research confirms that most people are relatively honest, with only occasional lying [11]Verified Executive Functioning and Pathological Lying in Adolescence: Examining Prevalence and Etiology
Confirms association between pathological lying and executive function deficits in adolescents, with pathological liars reporting 9.6 lies per day. No action is required, though continued self-awareness is always beneficial.

Score 25-48: Moderate Lying Tendencies. Your responses indicate a pattern of dishonesty that exceeds normal ranges. You may lie more frequently than average and may have experienced some negative consequences as a result. This score does not necessarily indicate pathological lying, but it suggests that examining your relationship with honesty could be beneficial. Consider discussing these patterns with a therapist or counselor.

Score 49-72: High Likelihood of Pathological Lying Tendencies. Your responses indicate significant and pervasive lying tendencies that may be causing harm to yourself and others. The patterns you have identified are consistent with what clinicians observe in pathological liars. Professional evaluation by a qualified mental health provider is strongly recommended. A survey of psychotherapists found that 73% recommend cognitive behavioral therapy (CBT) for this level of pathological lying [8]Verified Pathological Lying: Psychotherapists' Experiences and Ability to Diagnose
Confirms 73% of surveyed psychotherapists recommend CBT for pathological lying and that 56% of PL patients were diagnosed with personality disorders.

Score 73-96: Very High Likelihood of Pathological Lying. Your responses strongly suggest pathological lying tendencies that are likely causing significant disruption in multiple areas of your life. At this level, lying has likely become your default mode of communication and may be connected to deeper psychological factors requiring professional assessment. Seeking evaluation from a psychiatrist or clinical psychologist experienced in personality disorders is strongly encouraged.

Important Scoring Caveats

Several important factors should inform your interpretation of these results:

Self-report bias: By definition, individuals with pathological lying tendencies may underreport their behaviors. If you were not fully honest while completing this assessment, your score may underestimate your actual tendencies.

Context matters: High scores on individual categories may be more informative than the total score. For example, high scores on Category 2 (Ease of Lying) combined with low scores on Category 8 (Remorse) may indicate a different profile than the reverse pattern.

Not a diagnosis: This assessment cannot diagnose pathological lying, pseudologia fantastica, or any personality disorder. Only a qualified mental health professional can provide a clinical diagnosis after comprehensive evaluation [4]Verified Pseudologia Fantastica - StatPearls
Confirms PF is not recognized as a distinct diagnostic entity, treatment includes CBT and medications, and neurobiological dysfunction in prefrontal cortex is implicated. The diagnosis of pseudologia fantastica involves psychological testing, comprehensive medical evaluations, and gathering collateral information [4]Verified Pseudologia Fantastica - StatPearls
Confirms PF is not recognized as a distinct diagnostic entity, treatment includes CBT and medications, and neurobiological dysfunction in prefrontal cortex is implicated.

Fluctuating behavior: Lying patterns can change with stress levels, life circumstances, and mental health status. A single assessment provides a snapshot, not a permanent characterization.

Understanding the Spectrum of Deception

Not all liars are the same. Research distinguishes several categories along the deception spectrum:

Normal liars: Most people tell occasional lies. Some research suggests people tell an average of two lies per day [3]Verified Pathological Lying: Theoretical and Empirical Support for a Diagnostic Entity
Confirms pathological lying prevalence of 8-13%, with 13% of 623 participants self-identifying as pathological liars, and provides empirical support for PL as a diagnostic entity, though more recent studies found that a majority of people reported telling no lies within the past 24 hours, while a small subset reported telling numerous lies [3]Verified Pathological Lying: Theoretical and Empirical Support for a Diagnostic Entity
Confirms pathological lying prevalence of 8-13%, with 13% of 623 participants self-identifying as pathological liars, and provides empirical support for PL as a diagnostic entity.

Prolific liars: Research by Hart and colleagues found that about 5% of people tell half of all lies [7]Verified Have You Ever Met a Pathological Liar?
Confirms 91% of respondents believed they had contact with a pathological liar, and that about 5% of people tell half of all lies. These prolific liars lie significantly more than average but may not meet the threshold for pathological lying.

Compulsive liars: Some mental health professionals distinguish compulsive from pathological liars, though others consider them equivalent [5]Verified Pathological lying - Wikipedia
Confirms pathological lying is listed in DSM-5 as a symptom of other disorders, not standalone, and first described in 1891 by Anton Delbrück. Compulsive liars may lie without conscious control but may lack the elaborate, self-aggrandizing quality of pathological lies.

Pathological liars: These individuals meet the threshold identified by Curtis and Hart — telling numerous lies each day for longer than six months, with impaired functioning, significant distress, and increased danger [3]Verified Pathological Lying: Theoretical and Empirical Support for a Diagnostic Entity
Confirms pathological lying prevalence of 8-13%, with 13% of 623 participants self-identifying as pathological liars, and provides empirical support for PL as a diagnostic entity. Their lies are qualitatively different: dramatic, detailed, complicated, and often featuring the liar as the hero or victim [6]Verified Pseudologia Fantastica in the Emergency Department: A Case Report and Review of the Literature
Confirms key characteristics of pseudologia fantastica including lies featuring the pseudologue as hero or victim and lying on a spectrum between deceit and delusion.

For more on the different types of deceptive behavior, explore our guide to careless liars.

What Drives Pathological Lying?

The causes of pathological lying are multifaceted, involving neurological, psychological, and developmental factors:

Neurobiological factors: Yang et al.'s structural MRI studies demonstrated increased prefrontal white matter in pathological liars [9]Verified Prefrontal white matter in pathological liars
Confirms pathological liars showed 22-26% increase in prefrontal white matter and 36-42% reduction in grey/white ratios compared with controls [10]Verified Localisation of increased prefrontal white matter in pathological liars
Confirms 22-26% increase in orbitofrontal cortex, 32-36% in inferior frontal cortex, and 28-32% in middle frontal cortex white matter in pathological liars. The prefrontal cortex dysfunction linked to PF may contribute to difficulties in inhibiting dishonest behavior [4]Verified Pseudologia Fantastica - StatPearls
Confirms PF is not recognized as a distinct diagnostic entity, treatment includes CBT and medications, and neurobiological dysfunction in prefrontal cortex is implicated. A history of central nervous system abnormality has been found in 40% of documented cases of pseudologia fantastica [15]Verified Pathological Lying: Symptom or Disease?
Confirms that general population prevalence of pathological lying is unknown, and that a study of 1,000 juvenile offenders found close to 1% prevalence; King and Ford review showed equal sex ratio.

Personality disorders: A survey of psychotherapists found that more than half (56%) of patients exhibiting pathological lying were diagnosed with a personality disorder, including antisocial personality disorder (16%), borderline personality disorder (13%), and narcissistic personality disorder (5%) [8]Verified Pathological Lying: Psychotherapists' Experiences and Ability to Diagnose
Confirms 73% of surveyed psychotherapists recommend CBT for pathological lying and that 56% of PL patients were diagnosed with personality disorders.

Childhood and developmental factors: The onset of pathological lying most commonly occurs during adolescence [3]Verified Pathological Lying: Theoretical and Empirical Support for a Diagnostic Entity
Confirms pathological lying prevalence of 8-13%, with 13% of 623 participants self-identifying as pathological liars, and provides empirical support for PL as a diagnostic entity [11]Verified Executive Functioning and Pathological Lying in Adolescence: Examining Prevalence and Etiology
Confirms association between pathological lying and executive function deficits in adolescents, with pathological liars reporting 9.6 lies per day. Curtis and Hart found that adults who were pathological liars indicated that their problematic lying behavior began in adolescence [3]Verified Pathological Lying: Theoretical and Empirical Support for a Diagnostic Entity
Confirms pathological lying prevalence of 8-13%, with 13% of 623 participants self-identifying as pathological liars, and provides empirical support for PL as a diagnostic entity. Research on teens found that pathological liars reported telling an average of 9.6 lies per day and showed association with executive functioning deficits [11]Verified Executive Functioning and Pathological Lying in Adolescence: Examining Prevalence and Etiology
Confirms association between pathological lying and executive function deficits in adolescents, with pathological liars reporting 9.6 lies per day. Learn more about how early experiences contribute in our guide on whether lying is a sign of childhood trauma.

Low self-esteem and identity: Multiple case reports confirm that PF is prevalent in individuals with a fragile sense of self and low self-esteem [4]Verified Pseudologia Fantastica - StatPearls
Confirms PF is not recognized as a distinct diagnostic entity, treatment includes CBT and medications, and neurobiological dysfunction in prefrontal cortex is implicated. Psychodynamically, the lies serve to fulfill vanity, seek revenge, or satisfy unmet psychological needs [4]Verified Pseudologia Fantastica - StatPearls
Confirms PF is not recognized as a distinct diagnostic entity, treatment includes CBT and medications, and neurobiological dysfunction in prefrontal cortex is implicated.

Substance use: Pathological lying frequently co-occurs with substance use disorders [6]Verified Pseudologia Fantastica in the Emergency Department: A Case Report and Review of the Literature
Confirms key characteristics of pseudologia fantastica including lies featuring the pseudologue as hero or victim and lying on a spectrum between deceit and delusion. For families dealing with both issues, our guide on polygraph services for uncovering substance abuse provides practical guidance.

Recognizing Pathological Lying in Others

Identifying a pathological liar can be difficult, but research has highlighted several key warning signs:

Frequent lying about verifiable facts: Pathological liars tell lies that are easily disprovable, yet continue the behavior despite this [15]Verified Pathological Lying: Symptom or Disease?
Confirms that general population prevalence of pathological lying is unknown, and that a study of 1,000 juvenile offenders found close to 1% prevalence; King and Ford review showed equal sex ratio. Research on deception detection has shown that asking unanticipated questions can correctly classify up to 80% of liar and truth-teller pairs [18]Verified Outsmarting the liars: The benefit of asking unanticipated questions
Confirms unanticipated questions enabled correct classification of up to 80% of liar and truth-teller pairs.

Grandiose or heroic narratives: The stories typically feature the pseudologue as the hero or victim, designed to achieve acceptance, admiration, and sympathy [6]Verified Pseudologia Fantastica in the Emergency Department: A Case Report and Review of the Literature
Confirms key characteristics of pseudologia fantastica including lies featuring the pseudologue as hero or victim and lying on a spectrum between deceit and delusion. This pattern aligns with what King and Ford identified in their 1988 review of 72 cases [15]Verified Pathological Lying: Symptom or Disease?
Confirms that general population prevalence of pathological lying is unknown, and that a study of 1,000 juvenile offenders found close to 1% prevalence; King and Ford review showed equal sex ratio.

Inconsistencies over time: Pathological liars struggle to maintain their fabrications consistently. Research on exploiting liars' verbal strategies found that liars include fewer verifiable details than truth-tellers, and classifying participants by verifiable detail frequency alone achieved 79% accuracy [19]Verified Exploiting liars' verbal strategies by examining the verifiability of details
Confirms liars include fewer verifiable details than truth-tellers, with 79% accuracy in classification based on verifiable detail frequency.

Defensiveness when questioned: When confronted with contradictions, pathological liars typically create additional lies or become defensive. A case study noted that when "gently confronted with inconsistencies, the patient appeared unperturbed and easily provided further elaborate details to explain them" [6]Verified Pseudologia Fantastica in the Emergency Department: A Case Report and Review of the Literature
Confirms key characteristics of pseudologia fantastica including lies featuring the pseudologue as hero or victim and lying on a spectrum between deceit and delusion.

Relationship damage pattern: Repeated trust breakdowns across multiple relationships is a strong indicator. Research confirms that the most common negative consequences for pathological liars are poor emotional and social outcomes [7]Verified Have You Ever Met a Pathological Liar?
Confirms 91% of respondents believed they had contact with a pathological liar, and that about 5% of people tell half of all lies.

Lying about lying: Pathological liars may deny their lying even when presented with clear evidence. This connects to the broader challenges explored in why someone lying might agree to a polygraph test.

Can Pathological Liars Beat a Polygraph?

One of the most common questions about pathological lying relates to polygraph testing. Polygraph examinations measure involuntary physiological responses controlled by the autonomic nervous system — including changes in blood pressure, heart rate, respiration, and skin conductivity [20]Verified Beyond the Polygraph: Deception Detection and the Autonomic Nervous System
Confirms polygraph measures autonomic nervous system responses including blood pressure, heart rate, respiration, and perspiration. These responses occur automatically when a person experiences the stress associated with deception.

While pathological liars may be more comfortable with lying at a conscious level, research suggests that the autonomic nervous system still generates measurable stress responses during deception. A pivotal study by Dr. Robert Hare found that even psychopaths — who share characteristics with pathological liars — exhibited detectable physiological responses when lying, including increased electrodermal activity and heart rate deceleration [21]Verified Can A Psychopath Or A Pathological Liar Pass A Polygraph Test?
Confirms Dr. Robert Hare's 1978 study showing psychopaths exhibited detectable physiological responses on polygraph, with no false negatives. Not a single participant in Hare's study successfully "beat" the polygraph [21]Verified Can A Psychopath Or A Pathological Liar Pass A Polygraph Test?
Confirms Dr. Robert Hare's 1978 study showing psychopaths exhibited detectable physiological responses on polygraph, with no false negatives.

However, it is important to acknowledge complexities. Some research suggests pathological liars may exhibit reduced physiological responses because they experience less emotional conflict when lying [22]Verified Do 'lie detectors' work? What psychological science says about polygraphs
Confirms that lying can cause physiological responses measured by polygraphs, though same changes can occur when people are nervous. The neurological finding that pathological liars show reduced prefrontal activation when telling lies — unlike normal individuals who show increased activation — suggests that lying may require less cognitive effort for them [5]Verified Pathological lying - Wikipedia
Confirms pathological lying is listed in DSM-5 as a symptom of other disorders, not standalone, and first described in 1891 by Anton Delbrück.

The question of whether auxiliary case information influences polygraph diagnoses is also relevant. Research by Frank Hunter (1975) found that auxiliary case information can demonstrably bias polygraph diagnostic outcomes [23]Verified The Influence of Auxiliary Sources of Information in Polygraph Diagnoses
Confirms that auxiliary case information can demonstrably bias polygraph diagnostic outcomes, highlighting the importance of rigorous, standardized testing protocols. Modern polygraph techniques, including the comparison-question technique, are designed to detect deception even in individuals who are practiced liars [20]Verified Beyond the Polygraph: Deception Detection and the Autonomic Nervous System
Confirms polygraph measures autonomic nervous system responses including blood pressure, heart rate, respiration, and perspiration.

For anyone considering polygraph testing in this context, understanding the factors that can contaminate exam results is essential. Similarly, those with anxiety disorders or OCD should understand how their conditions may interact with testing.

Evidence-Based Approaches to Treatment

Treatment for pathological lying is available and offers genuine hope for change. According to the NIH StatPearls clinical resource, treatment for pseudologia fantastica typically includes cognitive behavioral therapy and medications such as SSRIs and SNRIs to address comorbid conditions like depression or anxiety [4]Verified Pseudologia Fantastica - StatPearls
Confirms PF is not recognized as a distinct diagnostic entity, treatment includes CBT and medications, and neurobiological dysfunction in prefrontal cortex is implicated.

Cognitive Behavioral Therapy (CBT): This is the most commonly recommended treatment. A survey of 295 psychotherapists found that 73% suggested CBT as part of treatment for pathological lying, with 41% recommending CBT alone [8]Verified Pathological Lying: Psychotherapists' Experiences and Ability to Diagnose
Confirms 73% of surveyed psychotherapists recommend CBT for pathological lying and that 56% of PL patients were diagnosed with personality disorders. CBT helps individuals identify and challenge the distorted thoughts and beliefs that fuel lying behavior, and teaches healthier coping mechanisms [8]Verified Pathological Lying: Psychotherapists' Experiences and Ability to Diagnose
Confirms 73% of surveyed psychotherapists recommend CBT for pathological lying and that 56% of PL patients were diagnosed with personality disorders. Research has indicated some success with using CBT to decrease lie-telling behavior and increase mood [24]Verified Can Pathological Liars Be Cured?
Confirms CBT is an effective approach for pathological lying, and that DBT and pharmacological interventions are additional options.

Dialectical Behavior Therapy (DBT): Originally developed for borderline personality disorder, DBT combines elements of CBT with mindfulness techniques and teaches patients to regulate emotions, tolerate distress, and improve interpersonal relationships [24]Verified Can Pathological Liars Be Cured?
Confirms CBT is an effective approach for pathological lying, and that DBT and pharmacological interventions are additional options. This is particularly valuable for pathological liars whose deception stems from emotional dysregulation.

Habit Reversal Training: Emerging research on pathological lying in adolescents suggests that treatments centered around executive functioning, including Habit-Reversal Training, may be effective for patients who present lying patterns associated with poor impulse control [11]Verified Executive Functioning and Pathological Lying in Adolescence: Examining Prevalence and Etiology
Confirms association between pathological lying and executive function deficits in adolescents, with pathological liars reporting 9.6 lies per day.

Pharmacological interventions: While medications alone are unlikely to treat pathological lying, they may help with comorbid conditions. Researchers have examined treatments such as fluoxetine and lithium, though there is not yet compelling evidence that pharmacological interventions alone can successfully decrease problematic lying [24]Verified Can Pathological Liars Be Cured?
Confirms CBT is an effective approach for pathological lying, and that DBT and pharmacological interventions are additional options.

Group and family therapy: Since lying is a social phenomenon, addressing it from a social perspective can help pathological liars understand how their dishonesty harms their connections. Group members and family members can provide accountability and help develop honest relating patterns [24]Verified Can Pathological Liars Be Cured?
Confirms CBT is an effective approach for pathological lying, and that DBT and pharmacological interventions are additional options.

For professionals working with these clients, our therapist's guide to requesting a client polygraph and resources on lie detector tests in sexual addiction therapy offer practical guidance.

Practical Guidance for Those Affected

Living with or being close to a pathological liar can be deeply distressing. Research confirms that experiences with pathological liars are overwhelmingly negative [7]Verified Have You Ever Met a Pathological Liar?
Confirms 91% of respondents believed they had contact with a pathological liar, and that about 5% of people tell half of all lies. Here are evidence-based strategies:

Document inconsistencies: Keep factual records rather than relying on memory when dealing with someone you suspect of pathological lying. Research on exploiting liars' verbal strategies shows that liars include fewer verifiable details than truth-tellers [19]Verified Exploiting liars' verbal strategies by examining the verifiability of details
Confirms liars include fewer verifiable details than truth-tellers, with 79% accuracy in classification based on verifiable detail frequency, so focusing on verifiable facts is key.

Set clear boundaries: Communicate that honesty is a non-negotiable requirement in your relationship. Be prepared to enforce consequences when boundaries are violated.

Avoid becoming an enabler: When you detect a lie, address it calmly but directly. Research shows that pathological liars' stories tend to grow from an initial lie [3]Verified Pathological Lying: Theoretical and Empirical Support for a Diagnostic Entity
Confirms pathological lying prevalence of 8-13%, with 13% of 623 participants self-identifying as pathological liars, and provides empirical support for PL as a diagnostic entity, so allowing small lies can escalate the pattern.

Seek your own support: Consider therapy for yourself to process the emotional toll of being in a relationship with someone who lies chronically. The impact of chronic deception on partners is significant and well-documented.

Consider professional verification: In situations where the truth is essential — such as suspected infidelity, substance abuse, or legal matters — professional polygraph examination can provide objective clarity. This is especially relevant in cases of gaslighting.

Encourage professional help: Frame your concern around care, not accusation. Sharing that treatment options exist, including CBT, can make the conversation more productive. Remember that 73% of psychotherapists recommend CBT for pathological lying [8]Verified Pathological Lying: Psychotherapists' Experiences and Ability to Diagnose
Confirms 73% of surveyed psychotherapists recommend CBT for pathological lying and that 56% of PL patients were diagnosed with personality disorders, providing hope for meaningful change.