Equipping witnesses with transferable skills: the Self-Administered Interview©

The Self-Administered Interview^© (SAI) is a novel investigative interview tool with potential practical benefits. Research revealed that the SAI increases the recall of correct information without a decrease in accuracy. In addition, it seems to prevent forgetting. Participants who had completed the SAI after viewing an event remembered more correct details following a delay than participants who did not have this early recall opportunity. The current study examined whether the beneficial effects of the SAI go beyond the well-established testing effect. Does the SAI make a good witness for one event or for a better witness in general? If the SAI provides general skills, its effects may transfer at least partially to a new event. Two groups of participants watched an event followed by SAI or free recall (FR) instructions. After a one-week delay participants were presented with a second event and received FR instructions. In addition to replicating the SAI effect, experienced SAI participants recalled more correct details for the second event than inexperienced individuals. The findings suggest that the SAI equips witnesses with transferable skills they can use during future retrieval of new events.     

The cognitive interview: A meta-analysis

Abstract

A meta-analysis was performed on the effects of the cognitive interview on correct and incorrect recall. The database comprised 42 studies with 55 individual comparisons involving nearly 2500 interviewees. A strong overall effect size was found for the increase of correctly recalled details with the cognitive interview compared to a control interview (d = 0.87). The overall effect size for the increase in incorrect details, although considerably smaller, was also significant toward the cognitive interview (d = 0.28). However, the accuracy rates (proportion of correct details relative to the total amount of details reported) were almost identical in both types of interview (85% for the cognitive interview and 82% for standard interviews, respectively). Taking methodological factors into consideration it was found that effect sizes for correct details were larger if staged events were used as the to-be-remembered episode (as compared to video films) and if the interviewees actively participated in the event. With regard to incorrect details effect sizes were larger for adults as compared to children. Furthermore, the enhanced version of the cognitive interview produced more errors than the original version.     

Using the cognitive interview with adults with mild learning disabilities

Abstract

Forty-seven adults with mild learning disabilities (mild intellectual disabilities) attending day-centres and thirty-eight adults from the general population viewed a videorecording of an accident. A day later the participants were interviewed using either a cognitive interview (CI) or a structured interview (SI, a control interview). Compared with their counterparts with learning disabilities, adults from the general population recalled more correct information and made fewer confabulations about persons and objects. Nevertheless, the type of interview had an impact. For both groups, the CI was more effective than the SI in enhancing recall although, for the ‘learning disabilities’ group, the CI also produced a disproportionate increase in the reporting of person confabulations. All the same, the accuracy ratios were similar across interview types (80% for the CI and 82% for the SI). It is suggested that the CI could be helpful in assisting people with learning disabilities to provide information about events they have seen.     

Modifying the cognitive interview: countenancing forensic application by enhancing practicability

The UK investigative interview model advocates police officers use the cognitive interview (CI). However, research has indicated that many officers perceive the CI as too cumbersome, complex, and time consuming for some types of crime. With this in mind we investigate the efficacy of two CI procedures, which have been substantially modified to enhance forensic practicability and retain the empirically demonstrated CI superiority effect. Employing the mock witness paradigm, both are compared to the procedure currently taught to UK police officers. Participant's memorial performance revealed no differences across interview conditions for the amount of correct and incorrect recall. However, those interviewed using the modified procedures confabulated less and were more accurate. Considering type of information recalled (person, action, object, and surrounding), no differences were found across conditions for correct or confabulated type recall. However, the two modified CIs elicited fewer incorrect person and object information items. Further, they were shorter in duration than the current procedure. Hence, for frontline less serious crime, or in time critical situations, the modified procedures may be viable alternatives. These findings and their implications are discussed.     

Detecting deception in suspects: verbal cues as a function of interview strategy

Research on deception has consistently shown that people are poor at detecting deception, partly due to lack of consistent cues to deception. This research focuses on eliciting verbal cues to deception when questioning suspects who deny crime and how such cues differ due to type of questioning. An experiment examined verbal differences between innocent and guilty mock suspects (N=96) as a function of veracity and interview style (Free recall, Probes, or Free recall plus Probes). Guilty (vs innocent) suspects omitted more crime-relevant information and their statements were more likely to contradict the evidence, showing that statement–evidence inconsistency was a cue to deception. This cue to deception was more pronounced when the interview contained probes. Lie-catchers (N=192) obtained an accuracy rate higher than chance (61.5%) for detecting deceptive denials. Implications for further research on verbal cues to deception are discussed.     

Providing eyewitnesses with initial retrieval support: what works at immediate and subsequent recall?

The effect of retrieval support on eyewitness recall was investigated in two experiments. Based on the outshining hypothesis, Experiment 1 tested whether retrieval support enhances witness performance (compared to free recall) especially when witnessing conditions are suboptimal (e.g., because witnesses were distracted during the crime). Eighty-eight participants watched a videotaped crime with either full or divided attention and subsequently received retrieval support with the Self-Administered Interview© (SAI) or completed a free recall (FR). One week later (Time 2 – T2) all participants completed a second FR. Unexpectedly, retrieval support did not lead to better memory performance than FR under divided attention conditions, suggesting that retrieval support is not effective to overcome adverse effects of divided attention. Moreover, presence of retrieval support at Time 1 (T1) had no effect on memory performance at T2. Experiment 2 (N = 81) tested the hypothesis that these T2-results were due to a reporting issue undermining the memory-preserving effect of T1-retrieval support by manipulating retrieval support (SAI vs. FR) at T1 and T2. As expected, T1-retrieval support led to increased accuracy at T2. Thus, the beneficial value of T1-retrieval support seems greatest with high-quality T2-interviews. Interviewers should consider this when planning a subsequent interview.     

The Effects Of Children'S Age and Delay on Recall in a Cognitive or Structured Interview

The study examined; (i) whether the enhanced cognitive interview (ECI) would aid event recall when used with children, (ii) whether the effects of a delay between the witnessed event and interview would have an impact on the effectiveness of the ECI, (iii) whether the age of the child would have a bearing on the effectiveness of the ECI, and (iv) which category(ies) of event recall might be effected. Thirty-two 8 to 9 year old children and thirty-two 11 to 12 year old children were shown a video recording of a staged shoplifting. Half were interviewed four hours after viewing the event and half after a six day delay. Children were interviewed individually using either the ECI or a structured interview (SI). Those interviewed using the ECI recalled significantly more correct details (especially detail pertaining to actions) with no increase in the reporting of erroneous information. The ECI was found to be a reliable interviewing technique regardless of age and delay.     

Protecting Eyewitness Evidence: Examining the Efficacy of a Self-Administered Interview Tool

Given the crucial role of eyewitness evidence, statements should be obtained as soon as possible after an incident. This is not always achieved due to demands on police resources. Two studies trace the development of a new tool, the Self-Administered Interview (SAI), designed to elicit a comprehensive initial statement. In Study 1, SAI participants reported more correct details than participants who provided a free recall account, and performed at the same level as participants given a Cognitive Interview. In Study 2, participants viewed a simulated crime and half recorded their statement using the SAI. After a delay of 1 week, all participants completed a free recall test. SAI participants recalled more correct details in the delayed recall task than control participants.     

The cognitive interview and its effect on misleading postevent information

Abstract

The present study investigated the effectiveness of the cognitive interview on reducing the impact of the misinformation effect. A 2×2 between-groups design was used, with interview type (cognitive or structured) and narrative type (misleading or neutral) as the independent variables. Adults (n=40) viewed video footage depicting a bank robbery and then received either a misleading or neutral postevent narrative. Participants were interviewed with either a cognitive or a structured interview regarding their memory for the original footage. The cognitive interview produced significantly more correct pieces of information than the structured interview, without an increase in errors or confabulations. An anomalous significant interaction was found regarding the number of incorrect pieces of information, where recipients of the structured interview made more recall errors when receiving neutral postevent information compared to neutral postevent information. A misinformation effect was successfully achieved but the enhancing effects of the cognitive interview were unable to reduce it. Results are discussed within the misinformation effect theoretical framework. The limitations of the present study are also discussed.     

Does free recall moderate the effect of mental context reinstatement instructions on children's cued recall?

Cognitive Interview instructions increase children's recall of events; one important instruction is the mental reinstatement of context. We examined one factor that may affect mental context reinstatement: whether children had the opportunity to freely recall the event before answering cued recall questions. One hundred and fifty-two children aged 6, 9, or 11 years were interviewed twice about a staged event. The event consisted of an argument between two adults about whose turn it was to show the children a film. One week after the event, some of the children received mental context reinstatement instructions before having their cued recall tested. Some children also received a free recall test immediately before the cued recall test. In the second interview, 2 weeks after the first interview, all children freely recalled the event. The results showed no effects of mental context reinstatement instructions and no moderating effect of free recall on children's cued recall. The implications of these findings and directions for future research are discussed.     

The cognitive interview: A survey of its forensic effectiveness

Abstract

The cognitive interview has been shown to have the potential to enhance witness recall. Consequently, it has been adopted by all police forces in England and Wales. The present paper surveyed 96 police officers trained in the cognitive interview and 65 untrained police officers, using a questionnaire. Officers rated how frequently they used and how useful they found components of the cognitive interview. Trained officers were significantly more likely to use instructions to mentally reinstate context, use different orders, change perspectives and imagery. Amongst trained officers there was a consensus that some components of the cognitive interview were used more frequently and were believed to be more useful than others. Rated as most useful and most frequently used were establish rapport, report everything, encourage concentration, witness compatible questioning, and mental reinstatement of context. Rated as less useful and less frequently used were recall in different orders, imagery, change perspectives and transfer control. Further responses indicated that the cognitive interview was generally perceived to be a useful procedure that increases correct recall, although officers were still aware that incorrect information can also be generated. However, a major problem for many officers was that they do not have the time to conduct a full cognitive interview.     

Suggestibility and children with mild learning disabilities: The use of the cognitive interview

Abstract

The aims of this paper were firstly to identify any differences in the level of suggestibility between 20 7–9-year-old children with mild learning disabilities and 20 children with average academic ability using the Gudjonsson Suggestibility Scale 2 (GSS2) and, secondly, to note the impact of the cognitive interview on the response patterns of children with mild learning disabilities.

On the GSS2, average academic ability children recalled significantly more correct details than children with mild learning disabilities. There was no significant difference between the two groups of children on distortions, fabrications, total confabulations or on any of the four measures of suggestibility.

In the second part of the study, 38 children with mild learning disabilities watched a filmed event and then were interviewed using either a standard or a modified version of the cognitive interview. Following this, all participants were asked specific questions, some of which incorporated misleading information. One week later each participant was re-questioned. This time critical questions were included about the truth of the presuppositions introduced in the initial interview session. It was found that the cognitive interview elicited significantly more correct and incorrect details than a standard interview with no significant difference in fabrications. Use of the cognitive interview did not significantly affect susceptibility to subsequent misleading suggestions.     

The cognitive interview: Much more than simply “try again”

Abstract

In the legal context, the elicitation of complete and accurate statements from witnesses and victims is essential. The Cognitive Interview (CI) was devised to improve eyewitnesses' memory by using mnemonic strategies which ask witnesses to think about what happened and encourage them to make as many retrieval attempts as possible. However, no known study has experimentally examined whether (or not) the CI superiority effect is something more than merely asking a witness to retrieve information four times. The aim of this study was to compare the recall obtained by means of the CI - in which mnemonics are used - to that obtained as a result of asking subjects to make a multiple free recall task - without using mnemonics - in a single interview session. It was expected that significant differences would still exist. Results confirmed this hypothesis.     

How Can We Help Witnesses to Remember More? It’s an (Eyes) Open and Shut Case

Five experiments tested the idea that instructing a witness to close their eyes during retrieval might increase retrieval success. In Experiment 1 participants watched a video, before a cued-recall test for which they were either instructed to close their eyes, or received no-instructions. Eye-closure led to an increase in correct cued-recall, with no increase in incorrect responses. Experiments 2-5 sought to test the generality of this effect over variations in study material (video or live interaction), test format (cued- or free-recall) and information modality (visual or auditory details recalled). Overall, eye-closure increased recall of both visual detail and auditory details, with no accompanying increase in recall of false details. Collectively, these data convincingly demonstrate the benefits of eye-closure as an aid to retrieval, and offer insight into why hypnosis, which usually involves eye-closure, may facilitate eyewitness recall.     

Accuracy,confidence and consistency in repeated recall of events

Abstract

In legal practice, both confidence and consistency of the testimony of eyewitnesses are often used as indicators for accuracy, but their usefulness has been questioned. The present study was designed to determine the relationship between accuracy, confidence and consistency in episodic memory. After viewing a video of a complex series of events, one group of participants was given an initial cued recall test after one week, and repeated recall tests after three and five weeks. A second group of participants was tested after three and five weeks, and a third group was tested only once after five weeks. Accuracy and confidence (at least for incorrect answers) decreased with longer initial retention intervals, but there was no decrease in either accuracy or confidence when recall was repeated. Repeated testing also did not lead to confidence inflation. Correlations between accuracy, confidence and consistency varied from medium to large. Inconsistencies were mainly caused by forgetting and reminiscence. These inconsistencies were recalled almost as accurately as consistently recalled information.     

Police officers’ and Registered Intermediaries’ use of drawing during investigative interviews with vulnerable witnesses

ABSTRACT

Attempts to enhance episodic retrieval focus largely on verbal strategies which do not always address the limited or impaired free recall ability of vulnerable witnesses. Asking a witness to draw while recalling episodic information has long been deemed an effective method of improving communication and cognitive performance. Thus far, research has revealed these effects within laboratory settings but with scarce attention paid to real-life interview practice. In this paper, we explore police officers’ and Registered Intermediaries’ use of drawing during investigative interviews with vulnerable witnesses. A sample of specialist practitioners (n?=?85), comprising of vulnerable witness interviewing police officers (n?=?50) and Registered Intermediaries (n?=?35) completed a self-report questionnaire. As expected, frequent use of drawing was reported by both practitioner groups, and there was a positive correlation between reported use and perceived effectiveness. There were similarities between groups in reported techniques employed when using drawing, but some differences were apparent and these were attributed to the differing functions in police and Registered Intermediary roles. Overall, a consensus between empirical research and practice is evident, but these findings warrant further exploration in order to establish whether such practice is wide-spread.     

Eyewitness identification: Simulating the “Weapon effect”

The present experiment investigates the effect of weapons on eyewitness recall and recognition using a new experimental paradigm in which a syringe serves as weapon simulation. Contrary to previous weapon manipulations using slides or films of armed targets, the syringe paradigm is personally threatening to the subject. In a 2×2 design, 86 nonpsychology students were approached by an experimenter who was either holding a syringe or a pen and either did or did not threaten to administer an injection. Exposure to the syringe greatly decreased lineup recognition,p<.05, while enhancing the accuracy of recall for hand cues,p<.05. Contrary to predictions derived from the cue utilization hypothesis, threat of injection was not found to interact with the syringe manipulation. Investigation of individual differences indicated greater accuracy of recall for facial details the lower the subjects' fear of injections and the greater their cognitive abilities (closure and memory).This research project was supported in part by a grant of the Deutsche Forschungsgemeinschaft to Günther Köhnken. The authors would like to thank Gabriele Knaab, Gabriele Dieckmann, and Ursula Dannenberg for ably conducting the research.     

Recollections of a robbery

One week after committing a simulated robbery while intoxicated or sober, each of 142 subjects recalled the event within a “cognitive interview”. In an initial exploratory experiment, alcohol consumption reduced the accuracy of recall of a variety of types of information, in particular, information about persons. In the second experiment, person identification suffered following the consumption of alcohol, but only when arousal was low. Higher levels of arousal appeared instead to minimize the negative impact of alcohol upon encoding and recall. Second, whereas the recollections by subjects of what they saw during the crime were not impaired by alcohol consumption, their recollections of what they did were impaired. Both experiments examined the effects of arousal upon the subjects' recalls, and Experiment 2 tested the hypothesis that increased arousal serves to reduce attention to peripheral sources of information. This hypothesis was supported because the identification of persons central to the crime benefited from increased arousal but the identification of persons peripheral to the crime did not. A similar hypothesis about the effects of alcohol received only mixed support because the subjects' behaviors reflected “alcohol myopia” but their identifications of target persons did not. Finally, manipulations at the time of retrieval of the subjects' beliefs about how much alcohol had been consumed also altered accuracy of recall. These experiments were supported by research grants from the Alberta Law Foundation to the first author and from the Social Sciences and Humanities Research Council of Canada to the second author. The authors are indebted to the following people, whose assistance was invaluable: Matthew Davidson, Vanessa Farr, Corinne Kuzma, Eileen McFadzen, Laura Mensch, Debbie Robb, Todd Schultz, and Evelyn Tan. We also thank John Vokey, Brian Cutler, Beth Loftus, Garrett Berman, Marisa Caiola, and an anonymous reviewer who provided critical comments on an earlier version of this paper. This research was presented at the meetings of the American Psychology—Law Society, Williamsburg, March, 1990.     

The effect of odour reinstatement on children's episodic memory

Children's memory reports are often sparse, which increases the need for efficient interview methods. The present study investigated whether odour reinstatement can aid children's memory and increase the amount of information recalled from an experienced event. Children (N = 106, mean age 10 years, 8 months) experienced a magic show where a vanilla odour was present and were interviewed about their memory of the event either one week, or six months, after the magic show. During the interview, half of the children re-experienced the same vanilla odour. In contrast to studies on adult participants, no odour-reinstatement effect was found with the child participants in the present study. On the other hand, odour reinstatement reduced the children's ratings of how strong their emotions were during the event. Thus, odour reinstatement may affect different forensically relevant factors, and this should be considered in future research.