The prevalence of co-witnesses and co-witness discussions in real eyewitnesses

Abstract

Several laboratory studies have shown that eyewitness discussions can negatively affect memory recall. The current study looked at the prevalence of multiple witnesses using real witnesses at a UK identification suite. We investigated the frequency of co-witness discussion, what the co-witnesses tended to discuss and whether there was an association between this information, and the outcome of the identification. Sixty witnesses at the Force Identification Unit in Brighton (UK) filled out a questionnaire following the identification procedure. Co-witnesses were reported by 88% of the sample, with the average number of co-witnesses being 4.02 (SD=6.52). In addition, 58% of the multiple witnesses had discussed the criminal event with at least one co-witness. The most common areas of discussion were ‘general crime details’ (52%) and ‘suspect details’ (39%). The implications of these findings are discussed.     

Remembering remotely: would video-mediation impair witnesses' memory reports?

Witnesses often experience lengthy delays prior to being interviewed, during which their memories inevitably decay. Video-communication technology – favored by intergovernmental organizations for playing larger roles in judicial processes – might circumvent some of the resourcing problems that can exacerbate such delays. However, whereas video-mediation might facilitate expeditious interviewing, it might also harm rapport-building, make witnesses uncomfortable, and thereby undermine the quality and detail of their reports. Participants viewed a crime film and were interviewed either one day later via video-link, one day later face-to-face, or 1–2 weeks later face-to-face. Video-mediation neither influenced the detail or the accuracy of participants' reports, nor their ratings of the quality of the interviews. However, participants who underwent video-mediated interviews after a short delay gave more accurate, detailed reports than participants who waited longer to be interviewed face-to-face. This study provides initial empirical evidence that video-mediated communication (VMC) could facilitate the expeditious conduct of high-quality investigative interviews.     

The Self-Administered Interview: a means of improving children's eyewitness performance?

Abstract

In order to obtain the most informative and correct statements, witnesses should be heard as soon as possible after the incident. However, this is not always possible. This experimental study investigated whether completing a Self-Administered Interview form (SAI) immediately after a critical event could enhance children's witness performance at a later stage. Children (N = 194, age 11–12) reported their memory of an event in a structured SAI, an open SAI, or did not report their memory (control). Two weeks later, the children were interviewed about the event. Before the interview, half of the children were subjected to social influence from a co-witness. Children's free recall of the event was enhanced by the SAI. More precisely, children in the SAI-Structured condition reported more details about the event than children in the SAI-Open condition and the control condition, without a loss of accuracy. The SAI manipulation did not, however, reduce children's vulnerability to social influence. The results suggest that the use of a SAI might prove a simple and yet effective way of increasing the quality of statements from child witnesses in some situations.     

Memory conformity and suggestibility

Abstract

The present study examined whether the degree to which participants engage in memory conformity, which occurs when a person alters their memory report of an event to be consistent with another person, can be predicted by their levels of interrogative suggestibility (IS), which is the degree to which people are susceptible to altering their memory reports during questioning. Memory conformity was introduced by having participant and confederate pairs study words and then complete a social recognition test where they took turns to make judgements to the same items. When the participants responded after the confederate, they tended to conform to confederate's judgements regardless of whether the confederate had made a correct or incorrect response. IS was measured using the Gudjonsson Suggestibility Scale 2. This scale allows separate measures of Yield, which is a measure of how susceptible people are to altering their memory reports of events as a result of leading questions, and Shift, which is a measure of how susceptible people are to changing responses to questions when placed under pressure to do so. Only Yield was a significant predictor of memory conformity.     

Eye-closure improves memory for a witnessed event under naturalistic conditions

Eye-closure may help people remember live and videotaped mundane events and videotaped violent events. The present study extended this research by examining memory for a forensically relevant live event (a staged verbal altercation) and by interviewing witnesses under naturalistic conditions. Ninety-six witnesses were interviewed either inside in a quiet setting or outside on a busy street, with eyes open or closed. In free recall, eye-closure significantly increased the number of correct details reported, without harming testimonial accuracy. These benefits were significant for witnesses interviewed inside but not for witnesses interviewed outside. This finding highlights the potential role of spontaneous mental context reinstatement in the eye-closure effect. In cued recall, eye-closure improved fine-grain correct recall of visual details for both groups of witnesses. From an applied perspective, the findings suggest that police interviewers should instruct witnesses to close their eyes, both during initial statements taken on the street and during full interviews conducted at the police station.     

Encouraging eyewitnesses to falsely corroborate allegations: effects of rapport-building and incriminating evidence

Building rapport involves developing a harmonious relationship with another person and conveying understanding and acceptance towards that person. Law enforcement officers use rapport-building to help gather information from witnesses. But could rapport-building, in some situations, work to contaminate eyewitness testimony? Research shows that compelling incriminating evidence can lead people to corroborate false accusations made against another person. We investigated whether rapport-building – when combined with either Verbal or Verbal+Visual false evidence – might boost these corroboration rates. Subjects took part in a pseudo-gambling task, in which their counterpart was falsely accused of cheating. Using a 2 (Rapport: Rapport vs. No-rapport) × 2 (Incriminating Evidence: Verbal vs. Verbal+Visual) between-subjects design, we persuaded subjects to corroborate the accusation. We found that both rapport and verbal+visual incriminating evidence increased the compliance rate. Even when the incriminating evidence was only presented verbally, rapport-building subjects were almost three times as likely to corroborate a false accusation compared to subjects who did not undergo rapport-building. Our results suggest that although there is widespread and strong support for using rapport-building in interviews, doing so also has the potential to aggravate the contaminating power of suggestive interview techniques.     

Crises of confidence: Rhetorical constraints for incumbent party successors

Crises of confidence have plagued the American presidency since the introduction of television into the political sphere. Recognizing from previous research that unpopular incumbents use rhetoric in an effort to regain their credibility, this study looks at these rhetorical choices to see how they constrain or provide opportunities for the incumbent party's successors. Specifically, the study looks at the rhetoric surrounding instances where presidents have dropped 20 points in Gallup approval ratings within the last two years of their terms.

The study reveals that an unpopular incumbent's interest in regaining the public's faith is frequently at odds with his successor's interests. Incumbents need to remove themselves as the cause of the crisis, convince the public that they have the solution to the problem, and bide enough time to affect the situation. These choices tend to constrain the simplicity, flexibility, and timeliness of the successor's choices for rhetorically resolving the crises.     

证人的目击面孔心理重建及认知检测

提取目击证人对犯罪嫌疑人的面孔记忆是一项困难的工作,由于证人在识记面孔时有多种影响因素,在提取和再认记忆时又会有各种认知因素的影响,导致面孔心理重建的失真。因此,从认知心理学和实验心理学的角度入手,分析影响心理重建的因素,并用最佳的手段提取记忆,可以使面孔重建的可靠性最大化。认知相关电位在记忆检测领域的日臻完善,使目击证人的再认正确与否有了可靠的参照,从记忆反应的脑电图形分析,可以有效判断证人对列队辨认中的面孔是否存有记忆。     

潜能开发之我见

新的世纪对人的能力提出了更高、更新的要求,而不断发展的脑科学也不断揭示出人脑的新的功能,为潜能的开发提供了新的理论依据。