Psychophysiological Responses of People with Psychopathic Tendencies to the Concealed Information Test

This study was designed to investigate differences in psychophysiological responses among individuals with psychopathic tendencies. A total 40 students were participated and were divided into two groups based on Levenson Self‐Report Psychopathy Scale (LSRP) scores: a high psychopathic tendency group selected from the top 5% of LSRP scores, and a low psychopathic tendency group selected from the bottom 5% of LSRP scores. All participants were instructed to perform a mock crime and complete the concealed information test (CIT). Results indicate that significant differences between crime‐relevant questions and irrelevant questions were observed for respiration line length and skin conductance response in both groups, but heart rate did not significantly differ between groups. There were no differences in psychophysiological responses between the groups. In conclusion, CIT was found to be an effective method for detecting crime‐relevant information in individuals with psychopathic tendencies.     

Extracting Concealed Information from Groups*

Abstract: Lie detection procedures are typically aimed at determining guilt or innocence of a single suspect. Serious security threats, however, often involve groups, such as terrorist networks or criminal organizations. In this report, we describe a variant of the skin conductance‐based Concealed Information Test (CIT) that allows for the extraction of critical information from such groups. Twelve participants were given information about an upcoming (mock) terrorist attack, with specific instructions not to reveal this information to anyone. Next, each subject was subjected to a CIT, with questions pertaining to the details of the attack. Results showed that for every question, the average skin conductance response to the correct answer option differed significantly (p < 0.05) from those to all other options. These results show that the information about the upcoming attack could be extracted from the group of terror suspects as a whole.     

ID‐Check: Online Concealed Information Test Reveals True Identity

The Internet has already changed people's lives considerably and is likely to drastically change forensic research. We developed a web‐based test to reveal concealed autobiographical information. Initial studies identified a number of conditions that affect diagnostic efficiency. By combining these moderators, this study investigated the full potential of the online ID‐check. Participants (n = 101) tried to hide their identity and claimed a false identity in a reaction time‐based Concealed Information Test. Half of the participants were presented with personal details (e.g., first name, last name, birthday), whereas the others only saw irrelevant details. Results showed that participants′ true identity could be detected with high accuracy (AUC = 0.98; overall accuracy: 86–94%). Online memory detection can reliably and validly detect whether someone is hiding their true identity. This suggests that online memory detection might become a valuable tool for forensic applications.     

The saliency of gestural misinformation in the perception of a violent crime

Recent research has revealed that misinformation from gestures can influence eyewitness memory. However, it is still unclear whether gestural misinformation can emulate the effects of verbal misinformation on the reporting of major details in serious crimes. To investigate the salience of suggestions provided nonverbally, and how these compare to those made verbally, two experiments were conducted. In Experiment 1, participants watched footage of a crime scene and were presented with one of two types of gestures during questioning that suggested different interpretations of the crime. The results confirmed that the gestures influenced responses, with participants altering their interpretation of the crime according to the information gestured to them. Experiment 2 built on this to investigate how comparable gestural influence was to verbal influence. The results revealed that gestural misinformation caused participants to alter their interpretation of the crime and elicited the same effects as verbal misinformation. Across the two experiments, participants were unlikely to identify the misleading gestures or report feeling misled by them. These results reveal new insights into the strength of gestural misinformation and show that, despite their subtle nature in communication, gestures can exert a powerful influence in eyewitness interviews.     

Concealed information under stress: A test of the orienting theory in real‐life police interrogations

Purpose. The concealed information test (CIT) is a polygraph test that assesses recognition of critical (e.g., crime) information. Laboratory studies showing stronger heart rate deceleration to concealed compared to control information indicate that the orienting response (OR) accounts for responding in the CIT. An important restriction to these findings is that laboratory circumstances impose little or no stress on the examinees, and that under real‐life stress defensive responding may occur. Method. To examine the validity of the CIT under realistic stress, we analysed the data from 65 card tests conducted during real‐life police polygraph interrogations. Results. Baseline heart rate was higher than that observed in the laboratory, confirming that the situation was stress inducing. As in the laboratory, the concealed cards elicited greater heart rate deceleration compared to the control cards. Conclusions. The data support the OR theory of the CIT under real‐life stress.     

Detecting concealed information: The role of individual differences in executive functions and social desirability

The aim of the study was to assess the relationship between deception efficiency and individual differences in executive functioning (EF) and personality, with a particular focus on the influence of social desirability. A mock crime scenario was used, followed by a Concealed Information Test based on reaction times (RT-based CIT). Individual measures of EF (inhibition, shifting, and working memory [WM]) and personality (the Eysenck Personality Questionnaire – Revised, EPQ-R), plus a measure of social desirability (Balanced Inventory of Desirable Responding, BIDR) were collected in a distinct session. Results indicated that better executive functions were associated with faster responses to irrelevant items in the RT-based CIT. In a regression analysis, individual differences in shifting and spatial WM were significant predictors of the extra-time taken to lie, compare to truth-telling. No significant relations between deception outcomes and personality measures were noted. Looking at social desirability, the Impression Management scale predicted a further portion of variance in the extra time required to lie, beyond the contribution of executive functions. The utility of an individual differences approach to deception is advocated.     

Eyewitness Memory,Suggestibility, and Repeated Recall Sessions in Children with Mild and Moderate Intellectual Disabilities

This study of eyewitness memory questioned children with mild and moderate intellectual disabilities (ID) about a live staged event 1 day later and, again, 2 weeks later. Children with mild ID performed as well as typically-developing children of the same age in response to free recall instructions, and they were just as able as same age peers to resist misleading questions. However, they performed more poorly on general questions, probing for further information after free recall. The children with mild ID also changed their responses to specific questions more often in the repeated interview. The group of children with moderate ID showed markedly lower performance than peers of the same age on nearly every type of eyewitness memory question. Comparisons of the children with ID to mental age-matched peers indicated that performance was similar, although children with ID gave more information in response to free recall instructions and changed their answers in the repeated interview more often. Standardized measures of verbal memory (TOMAL) and suggestibility (Gudjonsson Suggestibility Scale) were modest to moderate predictors of eyewitness memory performance.     

What do you expect?: The influence of people's prior knowledge of crime categories on fact-finding

Jurors have accumulated prior knowledge of crime categories that influences their verdict choices (V. L. Smith, 1991, 1993). The present research investigates whether this prior knowledge also influences the fact-finding process by operating as an expectancy for information processing. Consistent with the expectancy hypothesis, Study 1 demonstrated that people are more susceptible to misleading information that is perceived to be typical of the crime in question than misleading information that is atypical. Studies 2 and 3 revealed that people's intrusion errors also contain more typical than atypical information. These results indicate that people's prior knowledge of crime categories does indeed serve as an expectancy for fact-finding. Thus, prior knowledge plays a broader role than previously appreciated. The implications of this breadth are discussed.     

The effects of immediate recall on eyewitness accuracy and susceptibility to misinformation

Eyewitnesses can be influenced by misinformation that they encounter when discussing the event with a co-witness. Some studies have found that an immediate recall of the event can inoculate eyewitnesses against such misinformation; others have found that it increases susceptibility to misinformation. These different findings may be due to methodological factors, so the aim of this study was to investigate the effects of three different recall conditions. An immediate cued recall, free recall or no recall was given to 88 participants after they watched a crime video. They then discussed the video with a confederate who introduced correct and incorrect information about the video. Accuracy and amount of recall was tested one week later. It was found that the immediate-recall questionnaire did not make participants more susceptible to misinformation in comparison to no-recall participants, indeed the data trended the other way, suggesting that immediate-recall inoculated participants against misinformation. Furthermore, the provision of correct post-event information increased memory accuracy, especially after immediate recall.     

Inconsistencies across repeated eyewitness interviews: supportive negative feedback can make witnesses change their memory reports

Past work shows that direct negative feedback and suggestive questioning can lead eyewitnesses to change their memory reports. Applying Gudjonsson’s [2003. The psychology of interrogations and confessions: A handbook. West Sussex: Wiley] model of interrogative suggestibility to interviews with witnesses, the present two experiments examined how indirect negative feedback delivered in a supportive manner from an interviewer can make witnesses change what they report they remember experiencing. After viewing a video of a crime, participants were interviewed twice, with either supportive negative feedback (i.e. with the interviewer sympathetically suggesting why many people’s memory may be inaccurate) or neutral feedback between the two rounds of questions. Results showed that people given supportive negative feedback changed significantly more of their responses than those given neutral feedback. Lower confidence ratings were associated with greater response change, but overall, despite having changed more responses, people given supportive negative feedback did not have reduced confidence or perceived accuracy. Type of feedback did not impact accuracy, and accuracy was not systematically related to confidence or perceived accuracy. Given the role that eyewitness reports play in the criminal justice system, better understanding factors that impact consistency and reliability is vital.     

Value of DNA evidence in detecting crime

DNA material is now collected routinely from crime scenes for a wide range of offences and the timely processing of the DNA is seen as key to its success in investigating and detecting crime. An analysis of DNA material recovered from the volume crime offences of residential burglary, commercial burglary, and theft of motor vehicle in Northamptonshire, U.K., in 2004 has enabled the DNA to be categorized into seven sources. Further analysis using a logistical regression has revealed a number of predictors, other than timeliness, that greatly influence whether the DNA material recovered from a crime scene enables the crime to be detected. The results indicate that a number of these predictors are of statistical significance and may be just as relevant in determining whether DNA successfully detects the crime as the timeliness of the processing of the DNA material. The most significant predictor was found to be investigating officer accreditation with location, quantity, and type of DNA material at the crime scene also being relevant. Accreditation of the Crime Scene Examiner recovering the DNA material was found not to be significant. Consideration is given to where further emphasis is needed by the U.K. police service to maximize the opportunities to detect volume crime with DNA.     

Can a witness report hearsay evidence unintentionally? The effects of discussion on eyewitness memory

Abstract

When eyewitnesses are exposed to misinformation about an event from a co-witness, they often incorporate this misinformation in their recall of the event. The current research aimed to investigate whether this memory conformity phenomenon is due to change in the witness's memory for the event, or to social pressures to conform to the co-witness's account. Participants were shown a crime video and then asked to discuss the video in groups, with some receiving misinformation about the event from their discussion partners. After a one-week delay some participants were warned about possible misinformation before all participants provided their own account of the event. In Study 1, participants made remember/know judgments about the items recalled, and in Study 2 they indicated the source of their memories. Co-witness information was incorporated into participants’ testimonies, and this effect was not reduced by warnings or source monitoring instructions, suggesting memory change may have occurred. However, there was some indication that remember/know judgments may help distinguish between ‘real’ memories and co-witness information.     

The Griffiths Question Map: A Forensic Tool For Expert Witnesses’ Assessments of Witnesses and Victims’ Statements

Expert witnesses are sometimes asked to assess the reliability of young witnesses and victims’ statements because of their high susceptibility to memory biases. This technical note aims to highlight the relevance of the Griffiths Question Map (GQM) as a professional forensic tool to improve expert witnesses’ assessments of young witnesses and victims’ testimonies. To do so, this innovative question type assessment grid was used to proceed to an in‐depth analysis of the interview of an alleged 13‐year‐old victim of a sexual assault and two rapes. Overall, the GQM stressed how the interview was mainly conducted in an inappropriate manner. The results are examined with regard to scientific knowledge on young witnesses and victims’ memory. Finally, it is argued that expert witnesses in inquisitorial systems might use the GQM while encountering difficulties to fulfill the legal standards for expert evidence in adversarial systems because of the lack of studies regarding its reliability.     

THE SIGNIFICANCE OF WHITE-COLLAR CRIME FOR A GENERAL THEORY OF CRIME

Advocates of the concept of white-collar crime have failed to make the case for its scientific value. Steffensmeier's efforts to save the concept further support our view that it is flawed and misleading. His efforts support our contention that the correlates of white-collar crime are the same as the correlates of crime, that the age distribution of offending is the same for white-collar crimes as for other crimes, that official statistics have sufficient validity for many etiological purposes, and that the search for a general theory of crime holds great promise for criminology.     

True and false memories in middle childhood: the relationship with cognitive functioning

This study was designed to investigate developmental changes in true and false memories and to detect links among them in middle childhood. Participants were 372 Italian children (from 6 to 11 years, 174 males) divided into two age groups. After hearing a story, children provided a free-recall and their true and false retrieved information was measured. Then children were repeatedly asked some true and misleading questions about the story and their cued-recall and interrogative suggestibility were measured. Finally, children again recalled the story to assess the post-event misinformation effect of the suggested information. Individual differences in fluid intelligence, working memory and executive functions were also assessed to investigate their relationships with true and false memories. Typical age effects were found in memory recall and interrogative suggestibility. Interesting links among true, spontaneous and suggested false memories were found. Finally, analyses did not reveal the existence of a relationship between suggestibility and cognitive functioning.     

Forensic Evidence and Criminal Investigations: The Impact of Ballistics Information on the Investigation of Violent Crime in Nine Cities,

We explore the impact of information from ballistics imaging hit reports on the investigation into violent crimes. Ballistics imaging hits link two crimes involving the same firearm by forensically matching tool marks on the fired bullets or cartridge cases. Interview data collected from detectives who received a hit report were used to explore the relationship between the presence of a hit report and outcomes in 65 gun‐related violent crime investigations in nine U.S. police agencies. Findings indicate hit reports rarely contribute to identification, arrest, charging, or sentencing of suspects, because of delays in producing hit reports. On average, hit reports were completed 181.4 days after the focal crime. This delay forces investigations to proceed without the benefit of information from ballistics analysis. Additionally, hit reports rarely contained detailed information that was immediately useful to investigators. Instead, hit reports required additional research by the investigator to unlock useful information.     

Information does not affect the validity of a comparison question test

Purpose . Detailed information about the comparison question test (CQT) and possible countermeasures are now available on the Internet. This study examined whether the provision of such information would affect the validity of the Test for Espionage and Sabotage, a directed lie variant of the CQT. Method . Forty participants were divided into four equal groups: guilty, guilty informed, innocent, and innocent informed. During a first appointment, participants either did or did not commit a mock crime: then some were provided with a book containing detailed information on the CQT, including possible countermeasures. After 1 week with the book, all participants were administered a CQT during their second appointment. Following the polygraph, participants responded to a questionnaire that asked them about their behaviour and perceptions during their examination. Results . There were no significant effects of providing information on the validity of the CQT. However, the reported use of countermeasures was associated with a lower probability of truthfulness. Results of the debriefing questionnaire were found to support predictions made by the theory of the CQT. Conclusions . Concerns that readily available information will enable guilty individuals to produce false‐negative errors seem unfounded. Moreover, the results actually indicate that the use of countermeasures was associated with a lower probability of truthfulness, which was exactly the opposite outcome predicted by the CQT critics.     

如何认定“知悉内幕信息”

随着证券市场的发展,证券犯罪日趋众多,虽然刑法、证券法等对证券违法犯罪都做了较为详尽的规定,但仍有许多急待完善的环节。内幕交易罪是证券犯罪中最为典型、数量最多的一种。本文拟就“知悉内幕信息”的认定与分析进行一些探讨,以完善内幕交易罪的有关规定,增强其可操作性。     

How Cross‐Examination on Subjectivity and Bias Affects Jurors’ Evaluations of Forensic Science Evidence

Contextual bias has been widely discussed as a possible problem in forensic science. The trial simulation experiment reported here examined reactions of jurors at a county courthouse to cross‐examination and arguments about contextual bias in a hypothetical case. We varied whether the key prosecution witness (a forensic odontologist) was cross‐examined about the subjectivity of his interpretations and about his exposure to potentially biasing task‐irrelevant information. Jurors found the expert less credible and were less likely to convict when the expert admitted that his interpretation rested on subjective judgment, and when he admitted having been exposed to potentially biasing task‐irrelevant contextual information (relative to when these issues were not raised by the lawyers). The findings suggest, however, that forensic scientists can immunize themselves against such challenges and maximize the weight jurors give their evidence by adopting context management procedures that blind them to task‐irrelevant information.