Neil Brewer

The dynamics of threat and challenge appraisals prior to stressful achievement events.

Research on cognitive appraisal of stressful achievement events has emphasized threat appraisals and anxiety. The present research also focused on challenge and positive emotion. Study 1 used hypothetical scenarios of stressful events. Study 2 explored temporal pattems of appraisal and emotion prior to an exam. Compared with threat appraisals, trait and state challenge appraisals were associated with more confident coping expectancies, lower perceptions of threat, higher positive emotion, and more beneficial perceptions of the effects of appraisal and emotion on performance. Beneficial perceptions of state appraisals were associated with higher exam performance. These findings were interpreted in the context of theoretical perspectives on the cognitive appraisal of stressful events and the adaptive functions of challenge and positive emotion.

The confidence-accuracy relationship in eyewitness identification: effects of lineup instructions, foil similarity, and target-absent base rates

Discriminating accurate from mistaken eyewitness identifications is a major issue facing criminal justice systems. This study examined whether eyewitness confidence assists such decisions under a variety of conditions using a confidence-accuracy (CA) calibration approach. Participants (N = 1,200) viewed a simulated crime and attempted 2 separate identifications from 8-person target-present or target-absent lineups. Confidence and accuracy were calibrated for choosers (but not nonchoosers) for both targets under all conditions. Lower overconfidence was associated with higher diagnosticity, lower target-absent base rates, and shorter identification latencies. Although researchers agree that courtroom expressions of confidence are uninformative, our findings indicate that confidence assessments obtained immediately after a positive identification can provide a useful guide for investigators about the likely accuracy of an identification.

The influence of motives and goal orientation on feedback seeking

This study examined the relationships between feedback seeking, goal orientation, performance and four motives which, though generally considered to underlie the feedback seeking process, have not previously been measured comprehensively. Both the likelihood and the number of instances of feedback seeking were measured in two samples (employees and students) in association with perceived or selfassessed above- and below-average performance. Self-assessed performance was a major predictor of feedback seeking; also influential were goal orientation and the goal orientation-performance interaction. Increased feedback seeking was associated with the desire for useful information motive, and reduced feedback seeking with the ego defence and defensive impression management motives. The desire for useful information motive mediated the influence of performance-prove goal orientation for employees, and that of a learning goal orientation for students.

Parental Identification of Early Behavioural Abnormalities in Children with Autistic Disorder

The aim of the study was to identify early behavioural abnormalities in children later diagnosed with autistic disorder. Accurate identification of such deficits has implications for early diagnosis, intervention and prognosis. The parents of 153 children with autistic disorder completed a questionnaire asking them to describe early childhood behaviours of concern and to recall the age of onset. Core deficit-linked behaviours were then identified and the ontogeny of their development was noted. Behaviour categories were: (1) gross motor difficulties, (2) social awareness and play deficits, (3) language and communication difficulties, and (4) unusual preoccupations. The findings supported the notion that the nature and prevalence of these deficits depend on age. Consistent with past research, there was a significant interval between parents first noticing abnormalities and the making of a definitive diagnosis. The implications for this delay are discussed.

Beliefs and data on the relationship between consistency and accuracy of eyewitness testimony

Two studies concerned with consistency and accuracy of eyewitness testimony were conducted. In Study 1 potential jurors indicated the degree to which they considered that various witness on-stand behaviours indicated testimonial accuracy. Witness statements that were inconsistent with previous statements were considered to be the strongest indicators of inaccuracy. Study 2 examined the relationship between consistency and accuracy of testimony. Witnesses viewed a film of a robbery and were interviewed twice (2 weeks apart) about the crime in a 4 (interview format)×2 (interview occasion) design. Regardless of whether consistency was operationalised in terms of direct contradictions between interviews, or degree of agreement on detail across interviews, no more than 10% of the variance in overall accuracy rate was explained by any individual measure. Number of contradictions and overall agreement between interviews did, however, make additive contributions to prediction of overall accuracy. Also, higher correlations between contradiction-based consistency measures and interview two accuracy rate were detected. Neither consistency nor accuracy for specific testimonial dimensions were predictive of accuracy on the other dimensions, or overall accuracy. Copyright

The Incidence of Criminal Victimisation of Individuals With an Intellectual Disability

The extent of criminal victimisation of individuals with an intellectual disability was compared to the nondisabled population. The results indicated significantly higher levels of victimisation in regard to both personal and property offences. Victimisation rates varied between organisations that provided services to individuals with different levels of disability. The mildly-moderately disabled clients of one organisation were particularly susceptible to both personal and property crimes. The organisation dealing with the more severely disabled cohort was faced with very high personal victimisation rates, but relatively low property victimisation rates. In addition, risk of victimisation varied with residential situation, the greatest risk experienced when living alone or with other disabled individuals. Examination of the extent of crime reporting indicated that while police were likely to become aware of the crime, it was unlikely to be the disabled victim who did the reporting.

Confidence-Accuracy Calibration in Absolute and Relative Face Recognition Judgments

Confidence-accuracy (CA) calibration was examined for absolute and relative face recognition judgments as well as for recognition judgments from groups of stimuli presented simultaneously or sequentially (i.e., simultaneous or sequential mini-lineups). When the effect of difficulty was controlled, absolute and relative judgments produced negligibly different CA calibration, whereas no significant difference was observed for simultaneous and sequential mini-lineups. Further, the effect of difficulty on CA calibration was equivalent across judgment and mini-lineup types. It is interesting to note that positive (i.e., old) recognition judgments demonstrated strong CA calibration whereas negative (i.e., new) judgments evidenced little or no CA association. Implications for eyewitness identification are discussed.

How normal and retarded individuals monitor and regulate speed and accuracy of responding in serial choice tasks.

These experiments investigate whether or not differences in the way that retarded and nonretarded individuals monitor and regulate speed and accuracy of responding contribute to the slower and more variable performance of retarded subjects on choice reaction time (RT) tasks. Rabbitt (1979, 1981) suggested that efficient choice RT performance is mediated by subjects tracking increasingly faster RT bands on successive trials until, by making and recognizing errors, they discover those very fast RT levels that should be avoided and those safe bands, just above typical error levels, that should be tracked. Experiments 1A and 1B established that most retarded subjects detect their errors as efficiently as nonretarded controls, a finding that excludes the possibility that retarded subjects do not monitor accuracy efficiently but achieve comparable levels of accuracy by consistently responding within very slow RT bands that minimize likelihood of errors. Experiment 2 showed that while a qualitatively similar trial-by-trial tracking mechanism mediates the performance of both groups, retarded subjects are less efficient at constraining RTs within very fast, but safe, bands. Increasing error probabilities at longer RTs suggest that momentary fluctuations in stimulus discriminability and/or attention are factors affecting RT variability in retarded subjects. The RT patterns for various sequences of correct responses initiated and terminated by errors suggest that the effective past experience (EPEX) guiding trial-by-trial RT adjustments of retarded subjects is short and inadequate, and it was argued that this can account for much of the remaining RT variability contributing to retarded-nonretarded differences. Not only does a short EPEX increase variability by giving rise to long error-free sequences of slower than average RT but also, when combined with occasional specified random fluctuations, it suggests why retarded subjects can achieve, but not sustain, RT levels maintained by nonretarded subjects.

The influence of schemas, stimulus ambiguity, and interview schedule on eyewitness memory over time.

The authors examined how a crime schema influenced the types of details witnesses recalled over multiple interviews that varied in delay before the initial interview and between subsequent interviews. Accuracy data showed that, in general, schema-irrelevant traces experienced greater decay than schema-consistent and schema-inconsistent traces after the initial interview and that delaying the initial interview negatively affected recall at the initial interview but led to less decay over subsequent interviews. Ambiguity of the crime stimulus was also manipulated. Witnesses used their schema to interpret ambiguous information and, as a result, made more schema-consistent intrusions and less correct responses and were more likely to report false memories that involved conscious recollection (using the remember-know paradigm).

The effect of judgment type and confidence scale on confidence-accuracy calibration in face recognition.

Confidence-accuracy calibration was examined for both absolute (recognizing single faces as old or new) and relative (selecting which of pairs of faces is old) judgments, using both full- (0%-100%) and half-range (50%-100%) confidence scales. The half-range confidence scale demonstrated superior calibration to the full-range scale, for which a confidence-accuracy association was evident only for the upper half (i.e., 50%-100%) of the scale. Good calibration was observed for the absolute judgment conditions, but the relative judgment conditions evidenced marked underconfidence. Also, in the absolute judgment conditions, good calibration for positive recognition decisions and poorer calibration for negative decisions was observed. These results are discussed in the context of theories of confidence and accuracy in face recognition memory and also of eyewitness identification research.