Age differences in the effects of social influence on children's eyewitness performance and their metacognitive monitoring

The current work investigated the effects of social influence on children's recall accuracy and metacognitive monitoring. Two studies were conducted in which 8- and 10-year-olds were confronted with postevent information in an interview situation. An interviewer (Study 1) or a confederate (Study 2) provided postevent information with two levels of assertiveness, inducing (a) a variation of conformity pressure and (b) a variation of information credibility. Afterwards, children's confidence judgments were assessed. The results revealed significant age differences in children's ability to adequately cope with variations of social influence. Although conformity pressure was especially important for the 8-year-olds, effects of informative social influence were independent of age. However, 10-year-olds were also able to act appropriately on low credibility, thereby demonstrating a more sophisticated consideration of social influence sources. Moreover, varying assertiveness also affected the quality of children's confidence judgments by improving their metacognitive differentiation skills.     

Child witnesses' metamemory realism

This study investigated the degree of realism in the confidence judgments of 11 to 12-year-olds (41 girls and 40 boys) of their answers to questions relating to a short film clip showing a kidnapping event. Four different confidence scales were used: a numeric scale, a picture scale, a line scale and a written scale. The results demonstrated that the children showed a high level of overconfidence in their memories. However, no significant differences between the four confidence scales were found. Weak gender differences were found in that the girls were slightly, but significantly, better calibrated than the boys. In addition, although both boys and girls overestimated the total number of memory questions they had answered correctly, the boys gave higher estimates compared with the girls. In brief, the results indicate that, at least in the context investigated, 11-12 year-old children's confidence in and estimations of their own event memory show poor realism (overconfidence and overestimation). A comparison with previous research on adults indicates that 11 to 12-year-old children show noticeably poorer realism.     

"I saw it with my own ears": the effects of peer conversations on preschoolers' reports of nonexperienced events

The study was designed to explore the effects of naturally occurring peer interactions and repeated suggestive interviews on preschoolers' (N=96, Meanage=54 months) memories for a personally experienced event, namely a staged archaeological dig. During the dig, one third of the children witnessed two "target" activities. A second third of the children were the classmates of those in the first group, but did not witness the target activities. The remaining children were not the classmates of those who witnessed the target activities, nor did they witness the target activities themselves, and thus served to provide a baseline against which to assess the effects of peer contact. Following the dig, the children were interviewed in either a neutral or suggestive manner on three occasions. Results from a fourth interview by a new examiner revealed that the combination of suggestive interviews and peer exposure led to claims of witnessing the target activities by the classmate group that were comparable to the children who actually did witness these activities. Further, assent rates to misleading questions employing peer pressure and false claims of actually seeing versus merely hearing about the target activities were elevated following opportunities to discuss these activities with peers.     

Children's memories of experienced and nonexperienced events following repeated interviews

The present study compared 3- and 5-year-olds' reports of a true or false play interaction following repeated interviews. Final interviews were conducted either by the same researcher or by a new researcher. Age-related improvements in performance were evident. Also, 3-year-olds questioned repeatedly about an entirely false event made more errors in response to specific questions than 3-year-olds questioned repeatedly about false details of a true event. Five-year-olds who were questioned about the false event, however, were particularly accurate when answering questions about never-experienced body touch. Interviewer familiarity was associated with decreases in the amount of narrative detail 5-year-olds provided in free-recall and with increases in 3-year-olds' accuracy in response to direct questions. Both errors and response latency on a cognitive matching task were related to children's suggestibility.     

ROC analyses in eyewitness identification research

There has been a recent surge of interest in analyzing the results of eyewitness identification experiments using Receiver Operating Characteristic (ROC) curves. Proponents of this approach have argued not only that ROC analyses are useful but that more traditional approaches are deficient and should not be used. Three arguments might be made for why researchers would prefer ROC approaches over other techniques. The first is that ROC analyses can provide an index of underlying memory discriminability. The second is that ROC analyses provide useful information about the practical utility of identification procedures. The third is that ROC analyses are useful for testing theory. In this article, I critically examine each of these arguments and conclude that recent claims that ROC methods provide the only justifiable method of comparing identification procedures are overstated.     

证据顺序和证词自信度对学前末期儿童因果推理的影响

开展两个实验探究证据顺序和证词自信水平对5岁儿童因果推理的影响机制。132名和127名5岁儿童分别参与实验1和实验2。实验1发现证据顺序对儿童因果推理的影响表现为近因效应,但证词的自信水平差异不影响儿童的因果推理;实验2发现如果儿童注意到证词的自信水平信息,他们更倾向于在自信证词条件依据证词推断因果关系,证据顺序的影响力被削弱。研究结果说明证据顺序变化导致易受影响的近因效应。