An exploration of visual behaviour in eyewitness identification tests

The contribution of internal (eyes, nose and mouth) and external (hair‐line, cheek and jaw‐line) features across eyewitness identification tests was examined using eye tracking. In Experiment 1 , participants studied faces and were tested with lineups, either simultaneous (test faces presented in an array) or sequential (test faces presented one at a time). In Experiment 2, the recognition of previously studied faces was tested in a showup (a suspect face alone was presented). Results indicated that foils were analysed for a shorter period of time in the simultaneous compared to the sequential condition, whereas a positively identified face was analysed for a comparable period of time across lineup procedures. In simultaneous lineups and showups, a greater proportion of time was spent analysing internal features of the test faces compared to sequential lineups. Different decision processes across eyewitness identification tests are inferred based on the results. Copyright © 2010 John Wiley & Sons, Ltd.     

Development of Recognition of Face Parts from Unfamiliar Faces

The present study examined developmental changes in the ability to recognize face parts. In Experiment 1, participants were familiarized with whole faces and given a recognition test with old and new eyes, noses, mouths, inner faces, outer faces, or whole faces. Adults were above chance in their recognition of the eye and mouth regions. However, children did not naturally encode and recognize face parts independently of the entire face. In addition, all age groups showed comparable inner and outer face recognition, except for 8‐ to 9‐year‐olds who showed a recognition advantage for outer faces. In Experiment 2, when participants were familiarized with eyes, noses, or mouths and tested with eyes, noses, or mouths, respectively, all ages showed above‐chance recognition of eyes and mouths. Thirteen‐ to 14‐year‐olds were adult‐like in their recognition of the eye region, but mouth recognition continued to develop beyond 14 years of age. Nose recognition was above chance among 13‐ to 14‐year‐olds, but recognition scores remained low even in adulthood. The present findings reveal unique developmental trajectories in the use of isolated facial regions in face recognition and suggest that featural cues (as a class) have a different ontogenetic course relative to holistic and configural cues. Copyright © 2012 John Wiley & Sons, Ltd.     

Eye remember you: the effects of gaze direction on face recognition in children and adults

Children and adults were tested on a forced‐choice face recognition task in which the direction of eye gaze was manipulated over the course of the initial presentation and subsequent test phase of the experiment. To establish the effects of gaze direction on the encoding process, participants were presented with to‐be‐studied faces displaying either direct or deviated gaze (i.e. encoding manipulation). At test, all the faces depicted persons with their eyes closed. To investigate the effects of gaze direction on the efficiency of the retrieval process, a second condition (i.e. retrieval manipulation) was run in which target faces were presented initially with eyes closed and tested with either direct or deviated gaze. The results revealed the encoding advantages enjoyed by faces with direct gaze was present for both children and adults. Faces with direct gaze were also recognized better than faces with deviated gaze at retrieval, although this effect was most pronounced for adults. Finally, the advantage for direct gaze over deviated gaze at encoding was greater than the advantage for direct gaze over deviated gaze at retrieval. We consider the theoretical implications of these findings.     

Participants' free‐hand drawings of a target face can influence recognition accuracy and the confidence–accuracy correlation

Two experiments were conducted to examine the effects of participants' free‐hand drawings on recognition accuracy and confidence for targets presented in a standard recognition paradigm and a lineup identification task. For both experiments, drawing a target influenced recognition accuracy and the confidence–accuracy correlation. In Experiment 1, the confidence–accuracy correlation was higher for participants completing a drawing than controls. Experiment 2 examined the drawings in relation to participants' decision to choose from the lineups. Once choosing was statistically controlled, the confidence–accuracy correlation for drawers was not higher than controls. These results suggest that the drawing influences the confidence–accuracy correlation by decreasing the likelighood of erroneously rejecting a target‐present lineup. Copyright © 2002 John Wiley & Sons, Ltd.     

Multiple confidence estimates as indices of eyewitness memory

Eyewitness identification decisions are vulnerable to various influences on witnesses' decision criteria that contribute to false identifications of innocent suspects and failures to choose perpetrators. An alternative procedure using confidence estimates to assess the degree of match between novel and previously viewed faces was investigated. Classification algorithms were applied to participants' confidence data to determine when a confidence value or pattern of confidence values indicated a positive response. Experiment 1 compared confidence group classification accuracy with a binary decision control group's accuracy on a standard old-new face recognition task and found superior accuracy for the confidence group for target-absent trials but not for target-present trials. Experiment 2 used a face mini-lineup task and found reduced target-present accuracy offset by large gains in target-absent accuracy. Using a standard lineup paradigm, Experiments 3 and 4 also found improved classification accuracy for target-absent lineups and, with a more sophisticated algorithm, for target-present lineups. This demonstrates the accessibility of evidence for recognition memory decisions and points to a more sensitive index of memory quality than is afforded by binary decisions.     

Effects of cannabis on eyewitness memory: A field study

Eyewitnesses to crimes are regularly under the influence of drugs, such as cannabis. Yet there is very little research on how the use of cannabis affects eyewitness memory. In the present study, we assessed the effects of cannabis on eyewitness recall and lineup identification performance in a field setting. One hundred twenty visitors of coffee shops in Amsterdam viewed a videotaped criminal event, were interviewed about the event, and viewed a target‐present or target‐absent lineup. Witnesses under the influence of cannabis remembered significantly fewer correct details about the witnessed event than did sober witnesses, with no difference in incorrect recall. Cannabis use was not significantly associated with lineup identification performance, but intoxicated witnesses were significantly better at judging whether their lineup identification was accurate. Theoretical and practical implications of the findings are discussed.     

Face recognition memory: The effects of exposure duration and encoding instruction

Two experiments test the effects of exposure duration and encoding instruction on the relative memory for five facial features. Participants viewed slides of Identi-kit faces and were later given a recognition test with same or changed versions of each face. Each changed test face involved a change in one facial feature: hair, eyes, chin, nose or mouth. In both experiments the upper-face features of hair and eyes were better recognized than the lower-face features of nose, mouth, and chin, as measured by false alarm rates. In Experiment 1, participants in the 20-second exposure duration condition remembered faces significantly better than participants in the 3-second exposure duration condition; however, memory for all five facial features improved at a similar rate with the increased duration. In Experiment 2, participants directed to use feature scanning encoding instructions remembered faces significantly better than participants following age judgement instructions; however, the size of the memory advantage for upper facial features was less with feature scanning instructions than with age judgement instructions. The results are discussed in terms of a quantitative difference in processing faces with longer exposure duration, versus a qualitative difference in processing faces with various encoding instructions. These results are related to conditions that affect the accuracy of eyewitness identification.     

Post‐identification feedback: exploring the effects of sequential photospreads and eyewitnesses' awareness of the identification task

Two experiments tested whether the sequential photospread procedure would protect eyewitnesses against memory distortion from post‐identification feedback. In Experiment 1, participants (N = 245) watched a videotaped event and then viewed a sequential or simultaneous target‐absent photospread. After their identification, participants were randomly assigned to hear confirming feedback ‘Good, you identified the suspect.’ or no feedback (control). Participants then completed a questionnaire assessing testimony‐relevant retrospective judgments. Post‐hoc analyses revealed that the sequential photospread only protected against post‐identification feedback effects for participants who reported that, while they watched the video, they did not expect to make an identification. A second experiment (N = 320) was conducted to manipulate expectations about the identification task and the presence of the target. This experiment revealed that the post‐identification feedback effect persists across witnesses' expectations and lineup type. Copyright © 2006 John Wiley & Sons, Ltd.     

‘Good,you identified the suspect…but please ignore this feedback’: can warnings eliminate the effects of post‐identification feedback?

The present experiments focus on whether the post‐identification feedback effect can be reduced by providing participants with warnings. Participants viewed a crime on video and identified a suspect from a target‐absent lineup (Experiment 1) or target‐present lineup (Experiment 2). Participants then received positive feedback, negative feedback or no feedback. Half of the participants received a warning saying their feedback was randomly generated by the computer, and the other half received no warning. Robust post‐identification feedback effects were observed in both experiments in the no warning condition. These effects were largely eliminated when participants received a warning. In Experiments 3 and 4, we failed to find an ameliorative effect of a forensically realistic warning. These results indicate that warnings can reduce the effect of post‐identification feedback in principle, but the application of warnings in practice may be more difficult. Copyright © 2006 John Wiley & Sons, Ltd.     

More Inaccurate But Not More Biased: Anxiety During Encoding Impairs Face Recognition Accuracy But Does Not Moderate the Own‐Ethnicity Bias

Heightened state anxiety can have a deleterious impact on memory for faces. In this paper we investigated whether anxiety: (i) moderates the own‐ethnicity bias (OEB) and (ii) impairs face recognition accuracy at the encoding or retrieval phase of an OEB face‐recognition task. Using a typical OEB task, anxiety was induced during encoding and retrieval in Experiment 1, but only during retrieval in Experiment 2. An OEB was found in both experiments, but anxiety did not moderate the OEB in either experiment. In Experiment 1, anxious participants were poorer at face recognition for both own‐ and other‐ethnicity faces. In Experiment 2 anxiety did not impair face recognition. Together, these studies suggest that anxiety impaired participants' encoding, but not retrieval, of faces. The implications of these findings are discussed. Copyright © 2015 John Wiley & Sons, Ltd.     

A cross-race effect in metamemory: Predictions of face recognition are more accurate for members of our own race

The Cross-Race Effect (CRE) is the well-replicated finding that people are better at recognizing faces from their own race, relative to other races. The CRE reveals systematic limitations on eyewitness identification accuracy, suggesting that some caution is warranted in evaluating cross-race identification. The CRE is problematic because jurors value eyewitness identification highly in verdict decisions. We explore how accurate people are in predicting their ability to recognize own-race and other-race faces. Caucasian and Asian participants viewed photographs of Caucasian and Asian faces, and made immediate judgments of learning during study. An old/new recognition test replicated the CRE: both groups displayed superior discriminability of own-race faces. Importantly, relative metamnemonic accuracy was also greater for own-race faces, indicating that the accuracy of predictions about face recognition is influenced by race. This result indicates another source of concern when eliciting or evaluating eyewitness identification: people are less accurate in judging whether they will or will not recognize a face when that face is of a different race than they are. This new result suggests that a witness's claim of being likely to recognize a suspect from a lineup should be interpreted with caution when the suspect is of a different race than the witness.     

Eye movements are functional during face learning

In a free viewing learning condition, participants were allowed to move their eyes naturally as they learned a set of new faces. In a restricted viewing learning condition, participants remained fixated in a single central location as they learned the new faces. Recognition of the learned faces was then tested following the two learning conditions. Eye movements were recorded during the free viewing learning condition, as well as during recognition. The recognition results showed a clear deficit following the restricted viewing condition, compared with the free viewing condition, demonstrating that eye movements play a functional role during human face learning. Furthermore, the features selected for fixation during recognition were similar following free viewing and restricted viewing learning, suggesting that the eye movements generated during recognition are not simply a recapitulation of those produced during learning.     

Positive and negative effects of physical context reinstatement on eyewitness recall and identification

The impact of context reinstatement (CR) on eyewitness recall and identification was explored in this study. Participants viewed a video of a staged theft and, following a 1‐week interval, were asked to identify the culprit and recall the event in either the same or in a different physical environment. Results suggested that CR enhanced the perceived familiarity of the lineup members, which in turn increased participants' willingness to identify someone in the lineup. Although CR significantly improved facial discrimination and identification accuracy when the target was present, it also increased confidence ratings beyond that warranted by the increase in accuracy. In terms of recall, reinstating the study context improved participants' free recall of both central and peripheral details and cued recall of peripheral details. The results were consistent with a (mis)attribution of familiarity and the outshining hypothesis. Copyright © 2009 John Wiley & Sons, Ltd.     

Eye remember you two: gaze direction modulates face recognition in a developmental study

The effects of gaze direction on memory for faces were studied in children from three different age groups (6-7, 8-9, and 10-11 years old) using a computerized version of a task devised by Hood, Macrae, Cole-Davies and Dias (2003). Participants were presented with a sequence of faces in an encoding phase, and were then required to judge which faces they had previously encountered in a surprise two-alternative forced-choice recognition test. In one condition, stimulus eye gaze was either direct or deviated at the viewing phase, and eyes were closed at the test phase. In another condition, stimulus eyes were closed at the viewing phase, with either direct or deviated gaze at the test phase. Modulation of gaze direction affected hit rates, with participants demonstrating greater accuracy for direct gaze targets compared to deviated gaze targets in both conditions. Reaction times (RT) to correctly recognized stimuli were faster for direct gaze stimuli at the viewing phase, but not at the test phase. The age group of participants differentially affected these measures: there was a greater hit rate advantage for direct gaze stimuli in older children, although RTs were less affected by age. These findings suggest that while the facilitation of face recognition by gaze direction is robust across encoding and recognition stages, the efficiency of the process is affected by the stage at which gaze is modulated.     

“All I remember is the black eye”: A distinctive facial feature harms eyewitness identification

Many crimes occur in which a perpetrator has a distinctive facial feature, such as a tattoo or black eye, but few eyewitness identification (ID) studies have involved such a feature. We conducted an experiment to determine how eyewitness ID performance is impacted by a distinctive facial feature, and how police could deal with this issue. Participants (N = 4,218) studied a target face with or without a black eye, and later viewed a simultaneous photo lineup either containing the target or not. For those who saw a target with a black eye, this feature was either replicated among all lineup members or was removed. The black eye harmed empirical discriminability regardless of replication or removal, which did not differ. However, participants responded more conservatively when the black eye was removed, compared to replication. Lastly, immediate confidence was consistently indicative of accuracy.     

Long‐Term Memory Effects of Eye Closure on Children Eyewitness Testimonies

Previous studies conducted on adults and children found that closing the eyes while recalling an event increased memory accuracy for both free and cued recall. One possible explanation to this phenomenon is that eye closure increases the amount of cognitive resources devoted to the task reducing external stimulation, but it is still not clear whether the beneficial effect is only due to a better focus on the task or to a better encoding of the material leading to an advantage over time. In this study, we evaluated the effect of eye closure instruction on children memory accuracy for a short clip in an immediate and delayed recall. We observed that asking participants to close their eyes while performing a memory task helped them to remember more details and that this effect persisted after a time delay. Copyright © 2012 John Wiley & Sons, Ltd.     

Effects of mugshot commitment on lineup performance in young and older adults

Two experiments assessed the effects of mugshot commitment on the ability to make a subsequent lineup identification. Young (17–37 years) and older (55–87 years) participants viewed a crime video featuring a younger (20 years) or older (64 years) culprit. Some participants viewed a 50‐photograph culprit‐absent mugbook. Following a 1‐week delay, participants returned to view a culprit present lineup. In Experiment 1, mugbook choosers tended to select their prior selection in the lineup and mugbook nonchoosers tended to reject the lineup. In Experiment 2, mugshot choosers rejected a lineup that did not contain their prior selection. Commitment to a prior selection and commitment to a selection strategy were the cause of the majority of lineup errors. As previously reported, mugshot exposure harms subsequent lineup identification, and this appears to be primarily the result of commitment effects. Copyright © 2008 John Wiley & Sons, Ltd.     

Aberrant first fixations when looking at inverted faces in various poses: The result of the centre‐of‐gravity effect?

Face recognition is essential in everyday human life, and all faces are encountered in different poses. However, when a face is inverted, difficulties arise for recognition and eye movements may (Barton, Radcliffe, Cherkasova, Edleman, & Intriligator, 2006) or may not be disrupted (Williams & Henderson, 2007). The present study explored the effects of orientation and pose on recognition and eye movements during a standard old/new recognition task in order to resolve whether inversion disrupts eye movements. Eye‐tracking data looked at the first fixations, the number of fixations, and the duration of fixations over a face. A standard inversion effect was observed, but the three‐quarter view advantage was not observed. Eye‐movement data revealed that the eyes were the most sampled feature (in terms of first fixation, number of fixations, and duration of fixation) for all upright faces, however, other features were sampled first for inverted faces. These results are consistent with Barton et al.'s (2006) but not Williams and Henderson's (2007) findings: possible explanations for this are discussed with the caveat that the same images were used from learning to test.