Increasing pressure does not benefit lie detection: a reply to Ten Brinke et al. (2015)

When passively attending to suspects, observers are poor at distinguishing lies from truths. Deception research has therefore shifted to examining interview styles aimed at eliciting and enhancing deception cues. Based upon a literature review and three empirical studies, ten Brinke, L., Khambatta, P., and Carney, D. R. [2015. Physically scarce (vs. enriched) environments decrease the ability to successfully tell lies. Journal of Experimental Psychology: General, 144, 982–992. doi:10.1037/xge0000103] recommend increasing pressure on interviewees as it would increase lie detection accuracy. In this comment, we argue that these authors (1) misinterpret the literature when concluding that lie detection benefits from increasing pressure on interviewees, and (2) their data do not show that lie detection is more accurate when pressure is increased. In absence of such data, we recommend that increasing pressure on interviewees should be avoided: it hampers the elicitation of valuable information and can lead to false confessions.     

Behavioral Cues to Deception vs. Topic Incriminating Potential in Criminal Confessions

Coding statements of criminal suspects facilitated tests of four hypotheses about differences between behavioral cues to deception and the incriminating potential (IP) of the topic. Information from criminal investigations corroborated the veracity of 337 brief utterances from 28 videotaped confessions. A four-point rating of topic IP measured the degree of potential threat per utterance. Cues discriminating true vs. false comprised word/phrase repeats, speech disfluency spikes, nonverbal overdone, and protracted headshaking. Non-lexical sounds discriminated true vs. false inthe reverse direction. Cues that distinguished IP only comprised speech speed, gesticulation amount, nonverbal animation level, soft weak vocal and “I (or we) just” qualifier. Adding “I don't know” to an answer discriminated both IP and true vs. false. The results supported hypothesis about differentiating deception cues from incriminating potential cues in high-stakes interviews, and suggested that extensive research on distinctions between stress-related cues and cues to deception would improve deception detection.     

On the power of secondary confession evidence

Research on primary confessions has demonstrated that it is a powerful form of evidence. The goal of the current research was to investigate whether secondary confessions – the suspect confesses to another individual who in turn then reports the confession to the police – could be as persuasive. In Experiments 1 and 2, participants read a murder trial containing an eyewitness identification, a secondary confession, and character testimony, and made midtrial assessments of the evidence. Results indicated that the secondary confession was evaluated as the most incriminating. In Experiment 3, participants read summaries of four criminal trials, each of which contained a primary confession, a secondary confession, eyewitness identification, or none of the above. The two confession conditions produced significantly higher conviction rates. Our findings suggest that secondary confessions are another powerful and potentially dangerous form of evidence.     

Police interviewing styles and confessions in Japan

Psychological studies of suspects' confessions have been conducted mostly in English-speaking and European countries, and the results may not generalise to countries whose cultures and policing practices differ. In particular, the difference between Japanese and Western laws may affect the roles that police interviewers play in suspects' confessions. This study examined the interviewing techniques used by Japanese police officers and associated features of the suspects' confessions. An extensive questionnaire was completed by 276 police officers across Japan. Detailed ratings of their interview techniques were factor analysed, yielding five factors: Presentation of Evidence, Confrontation, Rapport Building, Active Listening, and Discussion of the Crime. Based on these five factors, we identified four interviewing styles: Evidence-focused, Confrontational, Relationship-focused, and Undifferentiated. When interrogators employed the Relationship-focused interviewing style, suspects were more likely to make full confessions and to provide new information. By contrast, suspects were more likely to make partial confessions and were less cooperative when the police officers employed an Evidence-focused style.     

“只有被告人供述”案件司法证明的谬误与厘清

我国《刑事诉讼法》第55条规定之目的,在于改善司法机关依赖口供定罪的现状,从而避免刑讯逼供等非法取证行为的发生,真正实现保障人权的基本目标。但是实践中不仅存在仅凭口供定罪的情形,还存在通过异化口供形式或者形式化口供补强,以规避第55条约束的现象。异化的口供形式,本质上仍然是“被告人供述”;形式化的口供补强规则,是以“被告人供述”为中心形成虚假印证。考虑到《刑事诉讼法》的根本目标,应当对第55条进行实质解释,既不能通过异化口供来定案,也不能进行形式化口供补强,将口供作为定案的主要依据。换言之,应当不断降低口供在司法证明中的证明力,积极寻找其他客观性证据,并结合排除合理怀疑的证明要求,从而达到我国的刑事证明标准,才是《刑事诉讼法》第55条的合理适用。     

Recent Supreme Court of Canada rulings on criminal defendants' right to counsel

The Supreme Court of Canada recently issued a trilogy of decisions pertaining to suspects' right to legal representation. These rulings further a major difference between the US and Canadian law: Canadian criminal suspects have far less access to legal counsel than suspects in the USA. This paper summarizes these decisions and draws comparisons between Canadian and the US criminal procedure with respect to a suspect's rights to legal representation. We present preliminary data on Canadian citizens' misunderstanding of criminal suspects' right to counsel and also Canadian legal professionals' opinions about the right to counsel. We recommend empirical investigation of the hypothesis that Canadian suspects are more likely than the US suspects to make false confessions.     

Measuring interrogative suggestibility in children: Reliability and validity of the bonn test of statement suggestibility

Abstract

The present paper describes three studies that examined false confessions in the laboratory. Studies 1 (N=56) and 2 (N=9) relied on the by now classic computer crash paradigm introduced by Kassin and Kiechel (Psychological Science, 7, 125–128, 1996). Study 3 (N=12) employed a novel paradigm in which undergraduate participants were falsely accused of exam fraud. Our data indicate that false confessions do occur, even when conditions become more ecologically valid. Furthermore, we explored whether individual differences in compliance, suggestibility, fantasy proneness, dissociation, and cognitive failures are related to false confessions. Of these, only fantasy proneness was associated with false confessions.     

英国非法自白规则论

从理论和实践的角度,对英国程序性违法的自白和采用暴力、威胁、许诺、欺骗等非法方法获取的自白以及毒树之果具体取舍的做法作了较深入探讨.英国非法自白规则采取法定应然性排除和法官自由裁量处理的两种路径.英国对非法自白取舍的标准归根结底在于自白的任意性,而自白的任意性标准是可变的,故英国法官自由裁量的处理仍然是非法自白取舍的主要路径.     

“I’d Know a False Confession if I Saw One”: A Comparative Study of College Students and Police Investigators

College students and police investigators watched or listened to 10 prison inmates confessing to crimes. Half the confessions were true accounts; half were false—concocted for the study. Consistent with much recent research, students were generally more accurate than police, and accuracy rates were higher among those presented with audiotaped than videotaped confessions. In addition, investigators were significantly more confident in their judgments and also prone to judge confessors guilty. To determine if police accuracy would increase if this guilty response bias were neutralized, participants in a second experiment were specifically informed that half the confessions were true and half were false. This manipulation eliminated the investigator response bias, but it did not increase accuracy or lower confidence. These findings are discussed for what they imply about the post-interrogation risks to innocent suspects who confess.     

审前重复供述的排除问题研究

在非法证据排除规则确立后,审前重复供述的排除问题浮出水面.从确保非法证据排除规则有效实施、消极的实证真实发现主义、人权保障以及遏制刑讯的角度看,审前重复供述应该排除.非法取证行为的持续影响效力理论是排除审前重复供述的依据,排除审前重复供述的标准是刑讯逼供等非法行为与重复供述之间存在因果关系.具体来说,排除重复供述,需要有刑讯逼供等非法取供行为,且该行为对被追诉人产生了较大影响,使其供述自由受到了较大限制.排除非法口供后,可反驳地推定重复供述不具有可采性.控方如欲使用重复供述,需要证明不存在因果关系.排除重复供述可能会遇到诸多障碍,需要通过法官独立司法维护司法公正.     

Confessions and denials and the relationship with personality

Purpose. The main aim of the study was to examine the reasons and personality factors associated with confessions and denials. It was hypothesized that antisocial personality traits and active involvement in criminal behaviour would distinguish true confessors and true deniers from false confessors and false deniers. Method. The participants were 1,080 students in further education in Iceland. Each was asked about false admissions made to teachers and parents in the past, as well as about confessions or denials (true and false) made to the police during questioning, and the reasons for having responded in the way they did. The participants also completed questionnaires relating to offending, personality and self‐esteem. Results. One‐quarter (25%) of the participants stated that they had in the past been interrogated by the police in relation to a suspected offence, of whom 59% said they had confessed. A small minority of those interrogated (3.7%; 1% of the total sample) claimed to have made false confessions to the police, whereas 10% claimed to have made false confessions to teachers or parents. Males were significantly more likely to report false confessions than females. False confessions and false denials were significantly associated with antisocial personality traits, with Eysenck Personality Questionnaire Psychoticism being the single best predictor. Those participants who made true confessions and true denials were most normal in their personality. Conclusions. Personality is a significant predictor of who makes false confessions and false denials.     

Interrogative Specialists and False Confessions: Debunking the Con Artist Myth

Within the criminal justice system, confessions are an extremely powerful form of evidence. Unfortunately, innocent people sometimes falsely confess to crimes they did not actually commit. Such travesties of justice have sparked a significant degree of academic research into the false confession phenomenon. Within the existing literature, there exists a conceptual framework that the interrogative methods and actions of law enforcement officers are a key cause of false confessions with some researchers going so far as to suggest that law enforcement interrogators act as confidence men who trick criminal subjects into confessing. However, few researchers have actually questioned law enforcement officers about false confessions and even fewer have consulted with officers who specialize in interrogation. This study is a subset of a larger qualitative case study designed to explore the experiences of 13 federal law enforcement polygraph examiners who specialize in interrogation regarding their approach to criminal interrogation and their experiences with both true and false confessions. This study focused on the personal processes federal law enforcement polygraph examiners use in reviewing Miranda rights and documenting confessions. NVivo software was used to organize the data. Common themes in interview responses were then identified and revealed that participants employ an open, detailed, and straightforward approach in reviewing Miranda rights and documenting the confessions of criminal subjects. These findings contradict the premise that law enforcement interrogators inherently operate as confidence men by tricking and manipulating criminal subjects.     

Jurors’ reactions to recanted confessions: Do the defendant's personal and dispositional characteristics play a role?

Abstract

Confession evidence presented at trial is extremely damaging to the defense. This study examines the impact of a recanted confession on jurors’ perceptions of a murder case in which the defendant claimed to have falsely confessed due either to an underlying medical condition, a psychological disorder, or the general stress of the interrogation. Also included were an inadmissible confession condition and a no-confession control condition. Results showed that the impact of the confession was mediated in part by the circumstances surrounding it. Although probability-of-commission estimates were as high in all of the conditions involving a confession, conviction rates were marginally higher when the disputed confession involved mental illness or interrogation-induced stress than when there was no confession, yet did not differ when the disputed confession involved a medical disorder or there was no confession. These findings show that not all recanted confessions are treated equally and that people selectively discount confessions depending on biases and beliefs they hold.     

Snitching,Lies and Computer Crashes: An Experimental Investigation of Secondary Confessions

Two laboratory studies with 332 student participants investigated secondary confessions (provided by an informant instead of the suspect). Participants allegedly caused or witnessed a simulated computer crash, then were asked to give primary or secondary confessions during interrogation. Study 1 replicated the false evidence effect for primary confessions. Secondary confessions were obtained at a high rate, which was increased by false evidence in combination with incentive to confess. In Study 2 a confederate either confessed to or denied crashing the computer. Incentive increased the rate of secondary confession only in the presence of a denial; that is, incentive increased the number of false secondary confessions only. Implications for the use of incentives during informant interrogation are discussed.     

“I'm Innocent!”: Effects of Training on Judgments of Truth and Deception in the Interrogation Room

The present research examined the extent to which people can distinguish true and false denials made in a criminal interrogation, and tested the hypothesis that training in the use of verbal and nonverbal cues increases the accuracy of these judgments. In Phase One, 16 participants committed one of four mock crimes (breaking and entering, vandalism, shoplifting, a computer break-in) or a related but innocent act. Given incentives to deny involvement rather than confess, these suspects were then interrogated. In Phase Two, 40 observers were either trained in the analysis of verbal and nonverbal deception cues or not trained before viewing the videotaped interrogations and making their judgments. As in past studies conducted in nonforensic settings, observers were generally unable to distinguish between truthful and deceptive suspects. In addition, those who underwent training were less accurate than naive controls—though they were more confident and cited more reasons for their judgments. The implications of these findings are discussed in light of what is known about police interrogations, false confessions, and the wrongful conviction of innocent suspects.     

Offenders' lies and truths: an evaluation of the Supreme Court of Sweden's criteria for credibility assessment

Abstract

The criteria used by Swedish courts for assessing credibility of plaintiffs' accounts were for the first time scientifically evaluated. Furthermore, unlike much previous deception detection research, we used offenders as participants instead of college students. False and truthful confessions by 30 offenders were analysed, and few significant effects were obtained. Truthful confessions were rated as having a higher degree of clarity than false confessions. Women's truthful confessions were rated as more credible than their false confessions. The offenders who were most experienced in being interviewed by the police gave a stronger impression of talking about something self-experienced in their false than in their truthful confessions; hence, it seems that offenders with more police interview experience have developed a kind of expertise in telling a convincing lie about crime. Overall, the criteria for credibility assessment used by Swedish courts had very limited usefulness in discriminating truthful and false confessions. A critique of the current status of evaluating statements in Swedish courts is provided.     

A non-standard method for estimating accuracy of lie detection techniques demonstrated on a self-validating set of field polygraph examinations

Abstract

A unique method for estimating field accuracy of the Comparison Question Test (CQT) – a polygraph technique – is presented, based on a combined probabilistic and algebraic model. It is built on paired examinations in criminal cases in which two opposing versions per case have been subjected to polygraph tests. The developed model is ground-truth free, thus there was no need to rely on external criteria of deception (e.g., confessions or physical evidence) in estimating the accuracy of the CQT. Results indicate an accuracy rate of 0.94 in detecting guilty examinees (Sensitivity) with a 0.06 False Negative rate and an accuracy rate of 0.835 (Specificity) with False Positive of 0.165 for the innocents. These figures excluded 20% of the cases that were ruled inconclusive. When no inconclusive calls were allowed, the accuracy rate dropped down to 0.8 with 0.2 error rates for both the guilty and the innocent examinees. The importance of this research stems from its being a field study that due to the unique methodology was not subjected to weaknesses usually found in polygraph field validity studies. This method is applicable to other techniques of deception detection and with some necessary adaptations may be also to eyewitness situations.     

False confessions and the relationship with offending behaviour and personality among Danish adolescents

Purpose . The main aim of the study was to examine false confessions to police, parents and teachers and their relationship to personality and self‐reported offending. Method . The participants were 715 students in further education in Denmark. Each was asked about false admissions made to teachers and parents in the past, as well as about confessions or denials (true and false) made to the police during questioning. The participants completed questionnaires relating to offending and personality. Results . Seventy‐three (10%) of the participants said they had been interrogated by the police, of whom thirty‐seven (51%) said they had committed the offence. Five (7%) said they had given a false confession to police, whereas one hundred and seven (15%) of the total sample said they had given a false confession to parents or teachers. False confessions to teachers and parents were best predicted by the rate of self‐reported offending and high compliance. The single most commonly reported reason for making a false confession was to protect a friend. Conclusions . The findings in the present study corroborate many of those found in similar Icelandic studies, although there were some differences, including fewer people being interrogated in Denmark and a higher base‐rate of innocence of those interrogated. The study indicates that false confessions to police do happen on occasions which needs to be recognized by the authorities.     

The Need for a Positive Psychological Approach and Collaborative Effort for Improving Practice in the Interrogation Room

The White Paper suggests important reforms that will reduce the likelihood of false confessions resulting from police interrogation. The research underlying these suggested reforms has yielded significant advances in our understanding of factors associated with false confessions. As we move forward, we encourage the development of empirically based approaches that provide a viable alternative to current practice. In doing so, we suggest that researchers pursue a positive psychological approach that involves partnering with practitioners to systematically develop interrogative methods that are shown to be more diagnostic. By taking such an approach, we believe that the recommendations offered in the current White Paper can be supplemented by methods that carry the support of both scientific and law enforcement communities.