Effect on Eyewitness Accuracy When Witnesses Are Told versus Not Told That They Will Be Allowed a Second Viewing

Lindsay, Lea, and Fulford (J Appl Psychol 76:741–745, 1991) found that false identifications increased, correct rejections decreased, and correct identifications minimally increased when witnesses were allowed a second viewing of a sequential lineup. We conducted a similar study in which we allowed mock witnesses a second viewing of a sequential lineup. Results indicated that participants who were allowed a second viewing made mostly incorrect identifications. Participants correctly identified the perpetrator more often when they were not told in advance that they would have a second viewing than when they were told. Additionally, those participants who were told that they would be allowed a second viewing incorrectly rejected the lineup more often than those who were not told. The findings yielded conclusions similar to those of Lindsay et al. (J Appl Psychol 76:741–745, 1991) suggesting that witnesses should not be allowed to view the lineup a second time. The results also suggest that, if a repeated lineup is used, witnesses should not be informed of that in advance.     

An analysis of multiple choices in MSL lineups,and a comparison with simultaneous and sequential ones

Abstract

Simultaneous lineups allow witnesses to compare lineup members, causing excessive mistaken identifications. Levi (1998b) has tested MSL lineups: they are sequential, larger, and allow multiple choices. [The MSL lineup was originally termed a Modified Sequential Lineup (Levi, 1998b). However, there are other modified sequential lineups.]

Each factor decreases mistaken identifications. However, witnesses make fewer single choices of culprits. Sometimes witnesses choose suspects more confidently than any foil. This analysis examines such multiple choices in four experiments. They account for half of multiple choices with culprits. Few foils are chosen, and such responses are rare in culprit-absent lineups, no more than single choices. They are therefore identifications too.

An experiment comparing simultaneous, sequential, and MSL lineups is also reported. The culprit was identified more in simultaneous lineups than in sequential ones. The simultaneous lineup had more mistaken choices than sequential and MSL lineups, whose results were identical. The simultaneous and sequential lineups were equally diagnostic, while the MSL lineup, four times larger, was more than four times more reliable.     

Non-biased lineup instructions do matter – a problem for older witnesses

Abstract

From the limited literature on older witnesses’ identification performance it is known that they are less accurate on lineups compared to younger witnesses. What is less certain is why they show this age deficit and what can be done to aid their performance. Witnesses forgot being given non-biased lineup instructions informing witnesses that the perpetrator may or may not be present. More older witnesses than younger witnesses forgot and witnesses who failed to report remembering these instructions were significantly less accurate on the lineups. In addition, the current study investigated the use of sequential lineup presentation and stringent decision criteria to aid the performance of older witnesses. Sequential presentation was beneficial to both younger and older adults when the lineup was target absent (TA) but was detrimental when the lineup was target present (TP). Stringent decision criteria had no significant beneficial effect. Future directions for aiding older witnesses’ performance are discussed.     

The information gained from witnesses' responses to an initial "blank" lineup

Wells ("The psychology of lineup identifications," Journal of Applied Social Psychology, 1984, 14, 89-103) proposed that a blank lineup (an initial lineup of known-to-be-innocent foils) can be used to screen eyewitnesses; witnesses who chose from a blank lineup (initial choosers) were more likely to make an error on a second lineup that contained a suspect than were witnesses who rejected a blank lineup (initial nonchoosers). Recent technological advances (e.g., computer-administered lineups) may overcome many of the practical difficulties cited as a barrier to the use of blank lineups. Our research extended knowledge about the blank lineup procedure by investigating the underlying causes of the difference in identification performance between initial choosers and initial nonchoosers. Studies 1a and 1b (total, N = 303) demonstrated that initial choosers were more likely to reject a second lineup than initial nonchoosers and witnesses who did not view a blank lineup, implying that cognitive biases (e.g., confirmation bias and commitment effects) influenced initial choosers' identification decisions. In Study 2 (N = 200), responses on a forced-choice identification test provided evidence that initial choosers have, on average, poorer memories for the culprit than do initial nonchoosers. We also investigated the usefulness of blank lineups for interpreting identification evidence. Diagnosticity ratios suggested that suspect identifications made by initial nonchoosers (cf. initial choosers) should have a greater impact on estimates of the likely guilt of the suspect. Furthermore, for initial nonchoosers, higher confidence in blank lineup rejections was associated with higher diagnosticity for subsequent suspect identifications. These results have implications for policy to guide the collection and interpretation of identification evidence. (PsycINFO Database Record (c) 2012 APA, all rights reserved).     

Research note: evidence for moving to an 84-person photo lineup

The traditional six-to-ten person lineup is known to be extremely unreliable. Witnesses who choose someone when the suspect is innocent are too likely to choose that suspect. One solution is to enlarge the lineup in a manner that reduces mistaken identification far more than it lowers correct identification of the culprit. This experiment was built on past research, and it displayed to witnesses lineups consisting of sets of 12 photographs in an album, either two sets (24 photos) or seven sets (84 photos). No difference was found between witnesses for the 24-person lineup or the 84-person lineup in either their ability to identify the target whom they had seen previously, or in the number of mistaken choices of someone in lineups where the target was absent. Since the chance that the witness might mistakenly identify the suspect is far less in the 84-person lineup, lineups should consist of at least that number.

Children's and adults' eyewitness identification accuracy when a culprit changes his appearance: Comparing simultaneous and elimination lineup procedures

Adults' (N = 239) and children's (N = 177, age range 8–13 years) identification abilities were examined when a culprit underwent a change in appearance following the commission of a crime. Simultaneous and elimination lineup procedures were compared to determine the reliability of each under ‘change in appearance’ conditions. Participants viewed a staged, videotaped theft and then examined a target‐present or ‐absent lineup. Correct identifications (target‐present lineups) decreased following a change in appearance regardless of age of witness and lineup procedure. Children's correct rejection rates (target‐absent lineups) were lower than those of adults. The elimination procedure compared with the simultaneous procedure was more effective at increasing correct rejections when the lineup members matched the culprit's appearance for children and adults. When lineup members did not match the culprit's appearance, correct rejection rates were similar across the two identification procedures for both aged groups.     

What We Know Now: The Evanston Illinois Field Lineups

A Freedom of Information Act lawsuit secured 100 eyewitness identification reports from Evanston, Illinois, one of three cities of the Illinois Pilot Program. The files provide empirical evidence regarding three methodological aspects of the Program’s comparison of non-blind simultaneous to double-blind sequential lineups. (1) A-priori differences existed between lineup conditions. For example, the simultaneous non-blind lineup condition was more likely to involve witnesses who had already identified the suspect in a previous lineup or who knew the offender (non-stranger identifications), and this condition also entailed shorter delays between event and lineup. (2) Verbatim eyewitness comments were recorded more often in double-blind sequential than in non-blind simultaneous lineup reports (83% vs. 39%). (3) Effective lineup structure was used equally in the two lineup conditions.     

Mug Shot Exposure Effects: Does Size Matter?

This research tested whether mug book size moderates mug shot exposure effects. Witnesses to a simulated theft searched either a small, a large, or no mug book, followed by a perpetrator-absent lineup containing a critical foil from the mug book. Contrary to predictions of a transference effect, critical foil lineup identifications did not differ across conditions. To test for a commitment effect, only participants who selected the critical foil in the mug book were considered; there was evidence of a commitment effect in the large mug book condition. Finally, there were more lineup-correct rejections in the large mug book condition; this was explained in terms of the criterion for making mug book choices carrying over to lineup choices.

Identification Accuracy of Children versus Adults: A Meta-Analysis

Identification accuracy of children and adults was examined in a meta-analysis. Preschoolers (M = 4 years) were less likely than adults to make correct identifications. Children over the age of 5 did not differ significantly from adults with regard to correct identification rate. Children of all ages examined were less likely than adults to correctly reject a target-absent lineup. Even adolescents (M = 12–13 years) did not reach an adult rate of correct rejection. Compared to simultaneous lineup presentation, sequential lineups increased the child–adult gap for correct rejections. Providing child witnesses with identification practice or training did not increase their correct rejection rates. Suggestions for children's inability to correctly reject target-absent lineups are discussed. Future directions for identification research are presented.     

Eyewitness Accuracy Rates in Sequential and Simultaneous Lineup Presentations: A Meta-Analytic Comparison

Most police lineups use a simultaneous presentation technique in which eyewitnesses view all lineup members at the same time. Lindsay and Wells (R. C. L. Lindsay & G. L. Wells, 1985) devised an alternative procedure, the sequential lineup, in which witnesses view one lineup member at a time and decide whether or not that person is the perpetrator prior to viewing the next lineup member. The present work uses the technique of meta-analysis to compare the accuracy rates of these presentation styles. Twenty-three papers were located (9 published and 14 unpublished), providing 30 tests of the hypothesis and including 4,145 participants. Results showed that identification of perpetrators from target-present lineups occurs at a higher rate from simultaneous than from sequential lineups. However, this difference largely disappears when moderator variables approximating real world conditions are considered. Also, correct rejection rates were significantly higher for sequential than simultaneous lineups and this difference is maintained or increased by greater approximation to real world conditions. Implications of these findings are discussed.     

Realism and eyewitness identification research

The importance of realism in eyewitness identification research is examined as the basis for both the credibility and utility of the information it provides. Without knowledge of how laboratory eyewitnesses behave differently from real eyewitnesses, the relevance and external validity of identification studies may be questioned. Factors differentiating these identification contexts are discussed. Witnesses in identification studies are in social decision-making contexts similar to those of real eyewitnesses when their decision to choose someone or to reject the lineup may have a significant impact on others' lives. Two studies are reported which preserve aspects of realism. Both presented witnesses with a realistic vandalism. The second maintained realism through the identification situation. The first study demonstrated effects of biased instructions on witnesses' willingness to make a lineup choice and on identification errors (with the offender present and absent). The second study showed an unexpected preference of witnesses for making an identification when the supposed consequences for the suspect were to be severe. To evaluate the generalizability and utility of laboratory studies it is important to determine whether their results and related theoretical analyses survive the transposition to more realistic contexts. Realistic studies should serve as benchmarks against which simulations are compared and their generalizability evaluated.     

Children’s Susceptibility to Misidentifying a Familiar Bystander From a Lineup: When Younger is Better

Children from 5 to 12 years of age (N=779) were shown a videotape where a preschool teacher has money stolen from her wallet. Children were shown a lineup, and for children in the bystander condition, the lineup contained a familiar bystander without the thief. Children in the control condition viewed the same lineup but they had not seen the bystander in the videotape. Among the 11–12-year olds, participants in the bystander condition were significantly more likely than control participants to misidentify the familiar bystander. This effect was not found in children from 5 to 10 years of age. When children in the control condition were shown a lineup that contained the thief without the bystander, the 11–12-year olds were significantly more likely than the younger children to correctly identify the thief. These findings demonstrate that age can both increase and decrease the accuracy of children’s lineup identification accuracy depending on the task at hand and the content of a lineup.     

Much better than the sequential lineup: a 120-person lineup

Abstract

Large lineups may be more reliable than small ones. However, research has found greatly reduced identifications in 40-person lineups of photos shown sequentially one at a time. The task may be more difficult than necessary. Grouping photos may provide an easier one. Three studies had compared seven-page lineups (42, 84, or 168 members) with lineups of about 20. In the first two studies identification and mistaken choice rates were identical in the large and smaller lineup. Identifications in the 168-person lineup were much less. This study tested a 10-page 120-person lineup, and added a 12-person lineup. No difference was found between the 120- and 24-person lineups, and an interaction in 12-person lineups was found between graduate lab student witnesses and others. False identifications, and the probability that the suspect is innocent when ‘identified’, is much less in 120-person lineups than the 24- or 12-person lineups, or the sequential lineup.     

Confidence and accuracy of eyewitness identification from lineups

Recent studies of confidence-accuracy correlations in eyewitness-identification experiments have produced highly variable results (Deffenbacher, 1980; Wells & Murray, 1984) with some correlations near 0 (Malpass & Devine, 1981) and others as high as 0.5 (Brigham et al., 1982). Much of this variability may be accounted for by differences, in the design of the research. Specifically, lineup experiments in which the to-be-identified person (target) is always present tend to produce higher confidence-accuracy correlations than studies also providing blank or target-absent lineups replacing the target with a lookalike. A reanalysis of previously collected data (Lindsay & Wells, 1980; Wallbridge & Lindsay, 1982) revealed that lineup foils (nontargets) were identified with significantly less confidence than targets or lookalikes but that targets and lookalikes were identified with equal confidence. Two experiments were conducted to test the hypothesis that confidence of identification is a function of the similarity of the identified person to the original target. The first experiment using nonstudent subjects (n=53) and multiple targets (n=14) to increase generalizability, demonstrated that the person in the lineup who most closely resembled the target was identified with the highest mean level of confidence. The second experiment examined confidence in identification following a crime staged for 260 introductory psychology students. The results indicated that the similarity of foils to the target (established by independent ratings) was predictive of both the frequency and confidence of identification of faces.     

PC_Eyewitness and the Sequential Superiority Effect: Computer-Based Lineup Administration

Computer technology has become an increasingly important tool for conducting eyewitness identifications. In the area of lineup identifications, computerized administration offers several advantages for researchers and law enforcement. PC_Eyewitness is designed specifically to administer lineups. To assess this new lineup technology, two studies were conducted in order to replicate the results of previous studies comparing simultaneous and sequential lineups. One hundred twenty university students participated in each experiment. Experiment 1 used traditional paper-and-pencil lineup administration methods to compare simultaneous to sequential lineups. Experiment 2 used PC_Eyewitness to administer simultaneous and sequential lineups. The results of these studies were compared to the meta-analytic results reported by N. Steblay, J. Dysart, S. Fulero, and R. C. L. Lindsay (2001). No differences were found between paper-and-pencil and PC_Eyewitness lineup administration methods. The core findings of the N. Steblay et al. (2001) meta-analysis were replicated by both administration procedures. These results show that computerized lineup administration using PC_Eyewitness is an effective means for gathering eyewitness identification data.     

An attempt to reduce guessing behavior in children's and adults' eyewitness identifications

The effects of age of witness, gender of witness, lineup presentation, and practice on eyewitness testimony were investigated. Ninety-six elementary-school children and 96 college students viewed a slide sequence of a crime, followed by target-present or target-absent photo identification in sequentially or simultaneously presented lineups. Prior to photo identification, half the subjects received a practice lineup. Children had a higher rate of choosing than adults, resulting in more foil identification errors in both target-present and target-absent lineups. Without prior practice, sequential presentation as compared to simultaneous presentation reduced errors in target-absent lineups for adult witnesses and showed a similar but nonsignificant reduction for child witnesses. With prior practice, sequential presentation lost the advantage over simultaneous presentation in target-absent error reduction. Practice reduced target-absent errors in simultaneous-presentation lineups for both age groups.