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Researcher file
S. Leal
17 peer-reviewed polygraph studies — 2008–2022.
17Studies
2008–2022Active period
33Co-authors
3Research areas
7Journals
Researcher record
NameS. Leal
Publications17 peer-reviewed studies in this database
Active period2008–2022
Research methodology profile
Research areas
Co-author network
Researchers who have co-authored studies with S. Leal.
Publications [17]
All peer-reviewed studies by S. Leal in our database.
[001]
2022 Psychiatry Psychology and Law
How researchers can make verbal lie detection more attractive for practitioners
The paper proposes focusing on "complications" (clusters of details that make stories more complex) as a practical real-time alternative to counting total details, and recommends effective verbal baselining that controls… [002] 2021Verbal cues to deceit when lying through omitting information: Examining the effect of a Model Statement interview protocol
Truth tellers consistently reported more complications than lie tellers across omission scenarios, while lie tellers provided more total details than truth tellers—a pattern opposite to fabrication-based deception. [003] 2020 Acta PsychologicaApplying the verifiability approach to deception detection in alibi witness situations
Truth-telling pairs provided significantly more checkable details demonstrating they were together than lying pairs, while lying pairs provided more uncheckable details. Collective statements enhanced the production of verifiable details for… [004] 2020 Legal and Criminological PsychologyVerbal cues to deceit when lying through omitting information
Truth tellers reported more complications than lie tellers after Model Statement exposure, but no significant difference emerged for total details — an atypical finding suggesting omission lies may reveal different… [005] 2018Using the model statement to elicit verbal differences between truth tellers and liars: The benefit of examining core and peripheral details
After exposure to a model statement, liars reported significantly more peripheral details than truth tellers, while both groups provided similar amounts of core details. This core-peripheral distinction revealed deception cues… [006] 2018 Legal and Criminological PsychologyWithin-subjects verbal lie detection measures: A comparison between total detail and proportion of complications
Proportion of complications significantly differentiated truth-tellers from liars in the post-model statement phase, proving more diagnostic than total detail count when combined with the model statement interview technique. [007] 2018 Legal and Criminological PsychologyCross-cultural verbal deception
Cultural cues overshadowed deception cues across all measures. While truth tellers provided more details than liars in all three cultures, the effect was significantly stronger for British (low-context) participants than… [008] 2017 Acta PsychologicaInsurance based lie detection: Enhancing the verifiability approach with a model statement component
Adding a Model Statement to the Verifiability Approach increased lie detection accuracy from 65% to 90% in insurance claim scenarios. [009] 2017 Acta PsychologicaUsing the Model Statement to elicit information and cues to deceit in interpreter-based interviews
The Model Statement successfully restored information yield in interpreter-mediated interviews to levels comparable with direct interviews. Verbal deception cues remained diagnostically valid across interpreter conditions, with truth tellers providing more… [010] 2016 Cheating, corruption, and concealment: The roots of dishonest behaviorA cognitive approach to elicit nonverbal and verbal cues of deceit
The cognitive approach produces superior detection accuracy (71% total detection) compared to traditional passive observation methods (56%), with techniques including reverse order recall, model statements, and unanticipated questions effectively amplifying… [011] 2013 Legal and Criminological PsychologyTwo heads are better than one? How to effectively use two interviewers to elicit cues to deception
Truth tellers provided significantly more detail than liars only in the supportive second interviewer condition, despite participants looking at the second interviewer less than 10% of the time. Liars displayed… [012] 2012 Journal of Nonverbal BehaviorWindows to the Soul? Deliberate Eye Contact as a Cue to Deceit
Liars displayed significantly more deliberate eye contact than truth tellers as an impression management strategy, whereas gaze aversion showed no difference between groups. This finding challenges the widely held belief… [013] 2011 Legal and Criminological PsychologyUsing sketch drawing to induce inconsistency in liars
Liars showed significantly lower consistency between sketches and verbal reports than truth-tellers, with classification accuracy of 80-100% for truth-tellers and 70-77% for liars across two experiments. [014] 2011 Legal and Criminological PsychologyUsing sketch-drawing to induce inconsistency in liars
Liars demonstrated significantly lower consistency between sketch drawings and verbal reports compared to truth-tellers, with correct classification rates of 70-100% across two experiments, substantially exceeding typical deception detection accuracy. [015] 2010 Psychology, Crime & LawThe occurrence of eye blinks during a guilty knowledge test
Eye blink suppression during crime-relevant questions successfully distinguished guilty from innocent participants with 76% overall accuracy, supporting the use of cognitive load-based ocular measures in the Concealed Information Test. [016] 2008 Journal of Nonverbal BehaviorBlinking During and After Lying
Liars displayed significantly decreased blink rates during deception followed by compensatory increases afterward, while truth tellers showed increased blink rates during the target period with no rebound effect—a striking behavioral… [017] 2008 Law and Human BehaviorIncreasing cognitive load to facilitate lie detection: The benefit of recalling an event in reverse order
Liars interviewed in reverse chronological order were detected with 60% accuracy compared to 42% in forward order—a 42% improvement. Reverse order interviews produced amplified diagnostic cues including more speech hesitations,…Explore all research.
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