Receiver operating characteristic analysis of age-related changes in lineup performance

In the basic face memory literature, support has been found for the late maturation hypothesis, which holds that face recognition ability is not fully developed until at least adolescence. Support for the late maturation hypothesis in the criminal lineup identification literature, however, has been equivocal because of the analytic approach that has been used to examine age-related changes in identification performance. Recently, receiver operator characteristic (ROC) analysis was applied for the first time in the adult eyewitness memory literature to examine whether memory sensitivity differs across different types of lineup tests. ROC analysis allows for the separation of memory sensitivity from response bias in the analysis of recognition data. Here, we have made the first ROC-based comparison of adults’ and children’s (5- and 6-year-olds and 9- and 10-year-olds) memory performance on lineups by reanalyzing data from Humphries, Holliday, and Flowe (2012). In line with the late maturation hypothesis, memory sensitivity was significantly greater for adults compared with young children. Memory sensitivity for older children was similar to that for adults. The results indicate that the late maturation hypothesis can be generalized to account for age-related performance differences on an eyewitness memory task. The implications for developmental eyewitness memory research are discussed

Supporting child witnesses during identification lineups: Exploring the effectiveness of Registered Intermediaries

Performance at identification lineup was assessed in 85 6- to 11-year-old typically developing children. Children viewed a live staged event involving two male actors, and were asked to identify the perpetrators from two separate lineups (one perpetrator present lineup, and one perpetrator absent lineup). Half the children took part in lineups adapted by a Registered Intermediary (an impartial, trained professional who facilitates understanding and communication between vulnerable witnesses and members of the justice system), and half took part in ‘Best-Practice’ lineups, according to current guidance for eyewitness identification in England and Wales. Children receiving assistance from a Registered Intermediary (relative to children who received ‘Best-Practice’ lineups) were more accurate in their identifications for perpetrator present lineups, and there was some evidence that they were also more accurate for perpetrator absent lineups. This provides the first empirical evidence for the effectiveness of Registered Intermediary support during identification lineups

The rehabilitation of face recognition impairments: A critical review and future directions

While much research has investigated the neural and cognitive characteristics of face recognition impairments (prosopagnosia), much less work has examined their rehabilitation. In this paper, we present a critical analysis of the studies that have attempted to improve face-processing skills in acquired and developmental prosopagnosia, and place them in the context of the wider neurorehabilitation literature. First, we examine whether neuroplasticity within the typical face-processing system varies across the lifespan, in order to examine whether timing of intervention may be crucial. Second, we examine reports of interventions in acquired prosopagnosia, where training in compensatory strategies has had some success. Third, we examine reports of interventions in developmental prosopagnosia, where compensatory training in children and remedial training in adults have both been successful. However, the gains are somewhat limited-compensatory strategies have resulted in labored recognition techniques and limited generalization to untrained faces, and remedial techniques require longer periods of training and result in limited maintenance of gains. Critically, intervention suitability and outcome in both forms of the condition likely depends on a complex interaction of factors, including prosopagnosia severity, the precise functional locus of the impairment, and individual differences such as age. Finally, we discuss future directions in the rehabilitation of prosopagnosia, and the possibility of boosting the effects of cognitive training programmes by simultaneous administration of oxytocin or non-invasive brain stimulation. We conclude that future work using more systematic methods and larger participant groups is clearly required, and in the case of developmental prosopagnosia, there is an urgent need to develop early detection and remediation tools for children, in order to optimize intervention outcome. © 2014 Bate and Bennetts

A comparison of video and static photo lineups with child and adolescent witnesses

In the UK video parades are the preferred method of identification employed in criminal cases. This policy implementation has been employed with little or no evidence concerning its validity. The reported research examines the effect of new video technology on children's identification evidence. The study compared 7–9 and 13–15-year olds' ability to make identifications from either video or static photo lineups. Two hundred and fifteen participants witnessed a live event and then after a delay of 2–3 days viewed a target present (TP), or target absent (TA) video or photo lineup. For video and photo TP lineups, correct responses did not differ as a function of age. Video lineups produced lower rates of false identifications for the TA lineups, but only for adolescent witnesses. It is concluded that there is nothing contra-indicated in the use of video identification procedures with children, and possibly certain benefits can accrue from its use

Faces in Motion: Age-Related Changes in Eyewitness Identification Performance in Simultaneous, Sequential, and Elimination Video Lineups

The identification performance of children (5 to 6 years, n = 180; 9- to 10- years, n = 180) and adults (n = 180) was examined using three types of video lineup procedures: simultaneous, sequential and elimination. Participants viewed a videotaped staged theft and then attempted to identify the culprit from a target-present or target-absent video lineup. Correct identifications in simultaneous and elimination video lineups did not differ as a function of age. The sequential video lineup was associated with a reduction in correct identifications for both child groups compared to adults. With respect to the target-absent lineup condition, the video elimination lineup was associated with an increase in correct rejection rates for adult witnesses. Age was also significantly associated with accuracy. Differences in correct rejection rates were observed between adults and children and also between the two child groups. Implications and future directions are discussed

Analysis of proteolytic enzyme-derived fragments of murine alpha-fetoprotein

The purpose of this study was (i) to generate proteolytic enzyme-derived fragments of murine alpha-fetoprotein (AFP); (ii) to characterize some of their physicochemical and immunological properties; and (iii) to isolate the fragments from proteolytic digests of mouse AFP. Significant differences in digestion patterns produced by the limited proteolysis of AFP were apparent. Proteolysis under denaturing conditions was most efficient and yielded smaller peptide fragments of narrower molecular weight range. Similar findings were observed for larger scale digests using milligram amounts of AFP. Some of the cleavage products were found to possess antigenic properties of the parent AFP molecule as demonstrated by immunoblotting experiments. Attempts were made to isolate individual AFP peptides from digests of 20-40 mg of the glycoprotein. Only partial separation of the proteolytic fragments was accomplished. Experiments were performed which involved testing the immunoregulatory activity of synthetic AFP peptides on an in vitro lymphocyte reaction known to be sensitive to AFP-mediated suppression. Anti-proliferative activity was observed with one of the peptides, AFP-34/48, which represents an amino acid sequence near the N-terminus of the parent molecule