Corrigendum: Detecting Deception within Small Groups: A Literature Review

This comprehensive literature review examines deception detection within groups of co-offenders, an area significantly neglected in deception research. The review analyzes both individual interviewing (suspects interviewed separately) and collective interviewing (interviewed simultaneously) approaches, highlighting unique cues to deceit that emerge only when groups are involved.

Systematic literature review synthesizing research on group deception detection, examining individual and collective interview approaches, consistency analysis, transactive memory theory, and group dynamics in deception contexts.

Background & Context

Investigators often have multiple suspects to interview to determine guilt or innocence, yet co-offending has been significantly neglected within the deception detection literature. This comprehensive review represents the first of its kind to discuss co-offending and the importance of examining deception detection within groups.

Traditional deception research has focused almost exclusively on solitary liars—individual suspects lying about individual acts. However, many crimes involve multiple perpetrators who must coordinate their deception. Groups can be interviewed individually (separate interviews) or collectively (simultaneous interviews), and these differing styles create unique opportunities to identify deception.

Research Design & Methodology

This is a systematic literature review examining the emerging field of group deception detection. The authors synthesized research on interviewing approaches and deception cues that emerge when multiple suspects are involved in the same incident.

The review examined two primary interviewing approaches:

• Individual interviewing: Group members interviewed separately, allowing examination of within-group consistency
• Collective interviewing: Group members interviewed simultaneously, allowing examination of communication and interaction cues
• Theoretical frameworks: Transactive memory theory, consistency heuristic, reconstructive memory
• Research base: Predominantly dyadic studies, with limited research on triads and larger groups

Results & Key Findings

Truth-telling groups show distinctive social behaviors: When truth-tellers recall shared events collectively, they exhibit interactions that cannot emerge in individual interviews—posing questions to one another, correcting each other, adding information, and finishing sentences—and these behaviors occur more frequently for truth-telling groups than lying groups.

Lying groups lack transactive memory: Lying groups are inventing shared events without the shared transactive memory system for encoding and retrieving information, relying instead on individual cognitive abilities to create a coherent story, making it difficult to illustrate the same degree of interactive behaviors as truth-tellers.

Key behavioral differences:

• Deceptive communication characterized by absence of social and interactive behaviors
• Lying group members merely recall planned, vague, fabricated stories
• Truth-tellers demonstrate reconstructive memory processes while liars attempt to repeat rehearsed narratives
• Most studies involve dyads, with only a few examining triads or quartets

Discussion & Significance

This review establishes group deception as a distinct domain requiring specialized investigative approaches. Within-group consistency can be measured when interviewing individually, while communication and interaction cues emerge during collective interviews—neither of which can be assessed when interviewing lone individuals about solo crimes.

The transactive memory framework provides theoretical grounding for understanding why truth-telling groups naturally exhibit collaborative recall behaviors that lying groups find difficult to replicate. Despite progress, there remains a long way to go before a complete understanding of deception within groups is established.

Limitations & Considerations

Deception studies predominantly involve dyads, with very few considering larger groups. The theoretical frameworks developed for pairs may not fully generalize to triads, quartets, or larger conspiratorial groups where coordination complexity increases.

The review identifies several gaps: need for research on larger groups, exploration of cultural differences (individualism vs. collectivism), development of interview protocols specifically designed for groups, and examination of group dynamics and strategies over time. Until recently, focus was purely on individual interviewing, and collective interviewing research is still emerging.

Practical Applications

Investigators facing multiple suspects should consider both interview approaches strategically. Interviewing group members separately allows assessment of statement consistency—do their stories align on details, or do contradictions emerge? Interviewing them together reveals whether they exhibit the natural collaborative behaviors of people recalling genuine shared experiences.

The findings suggest that collective interviews may be particularly diagnostic when combined with specific questioning techniques that require coordinated recall. However, investigators need specialized training to recognize and interpret group-specific cues, as traditional deception detection training focuses exclusively on individual behavior. The absence of natural interaction—not its presence—becomes the key diagnostic indicator of group deception.