The effects of memory trace strength on eyewitness recall in children with and without intellectual disabilities

Children with mild moderate intellectual disabilities (ID) were compared with typically developing peers of the same chronological age (CA) on an eyewitness memory task in which memory trace strength was manipulated to examine whether increased memory trace strength would benefit those with ID more than those without ID. No evidence was found for this claim or for the notion that different mechanisms are implicated in memory processes for children with ID versus CA controls. Fuzzy-trace theory was also used to contrast question types that probed verbatim memory versus gist memory. Manipulations of trace strength, when used with immediate recall (to reduce the impact of decay), were predicted to improve verbatim memory more than gist memory. The results broadly supported the predictions. Performance was not improved in the stronger trace strength condition on measures of recall that tapped gist memory (e.g., open-ended recall), whereas performance was significantly better in the stronger trace strength condition on two of the three measures of recall that tapped verbatim memory (i.e., closed misleading questions, open-ended specific questions). Differences in performance between the groups were quite marked on several question types, supporting previous findings that those with ID have certain vulnerabilities as potential witnesses compared with peers of the same CA.     

Identifying vulnerability markers in prodromal patients: a step in the right direction for schizophrenia prevention

Research has shown that many of the long-term deficits that are observable in schizophrenia populations are present prior to the emergence of psychotic symptoms. Recent research suggests schizophrenia has a "prodromal" period, whereby significant changes from premorbid functioning can be observed. Accurate classification of this period could have far-reaching implications for schizophrenia prevention. This article aims to provide an indepth evaluation of the perceived benefits of vulnerability marker research in this unique phase. It is hoped that identification of such markers may improve the predictive potency of prodromal criteria, and perhaps pave the way for future screening and primary prevention strategies.     

The wish for revenge

The wish for revenge is a ubiquitous response to narcissistic injury, and particularly to the narcissistic injury that accompanies oedipal defeat. Vengeful fantasy serves to represent and manage rage and to restore the disrupted sense of self and internalized imagining audience that have resulted from injury. Clinical and literary examples demonstrate the split within the representation of the self and the imagining other that underlies the wish for revenge, and the way that this split operates differently in the psychic economy of the transiently and the chronically vengeful.     

Search, enumeration, and aging: eye movement requirements cause age-equivalent performance in enumeration but not in search tasks

Response time (RT) and fixation frequency were measured for young and older adults in search and enumeration tasks under high- and low-attentional competition conditions. There was an age-related decrement in search rates for single targets both for RT and fixation frequency, but there was no deficit in enumeration rates either with or without distractors even though serial enumeration rates were much slower than single target search rates. Fixation frequency per item in serial enumeration was much greater than in serial visual search for a single target. Enumerating targets with distractors produced an overall increase in RT and fixation frequency that was greater for older adults. The data are contrary to a generalized slowing account, and an alternative is proposed on the basis of the need to make eye movements in enumeration but not in search tasks.     

The efficiency of feature-based subitization and counting

The enumeration of small numbers of objects (approximately 4) proceeds rapidly, accurately, and with little effort via a process termed subitization. Four experiments examined whether it was possible to subitize the number of features rather than objects present in a display. Overall, the findings showed that when features are presented randomly and are uncorrelated with object numerosity, efficient enumeration is not possible. This suggests that the visual system does not have parallel access to multiple feature maps and that subitization processes operate exclusively on representations coding the locations of objects. The data are discussed with respect to theories of visual enumeration and search.     

The effects of the presence of a face and direct eye gaze on voice identity learning

We rarely become familiar with the voice of another person in isolation but usually also have access to visual identity information, thus learning to recognize their voice and face in parallel. There are conflicting findings as to whether learning to recognize voices in audiovisual vs audio-only settings is advantageous or detrimental to learning. One prominent finding shows that the presence of a face overshadows the voice, hindering voice identity learning by capturing listeners' attention (Face Overshadowing Effect; FOE). In the current study, we tested the proposal that the effect of audiovisual training on voice identity learning is driven by attentional processes. Participants learned to recognize voices through either audio-only training (Audio-Only) or through three versions of audiovisual training, where a face was presented alongside the voices. During audiovisual training, the faces were either looking at the camera (Direct Gaze), were looking to the side (Averted Gaze) or had closed eyes (No Gaze). We found a graded effect of gaze on voice identity learning: Voice identity recognition was most accurate after audio-only training and least accurate after audiovisual training including direct gaze, constituting a FOE. While effect sizes were overall small, the magnitude of FOE was halved for the Averted and No Gaze conditions. With direct gaze being associated with increased attention capture compared to averted or no gaze, the current findings suggest that incidental attention capture at least partially underpins the FOE. We discuss these findings in light of visual dominance effects and the relative informativeness of faces vs voices for identity perception.     

Primacy and recency effects in task analyses: Preliminary results

Performance for three independent living tasks were examined via task analyses. Given the relatively small sample size (n = 56) of individuals with intellectual and developmental disabilities, we simulated 1000 replications based upon observed results using Monte Carlo techniques. The results of the current study suggest that: (1) adaptive behavior was more related to task performance than IQ; and (2) after statistically controlling for adaptive behavior, task performance was influenced by the first step. Task performance appear to be over-estimated with the inclusion of the first step.     

AIDS/HIV in the work of family therapy trainees

A group of family therapy trainees were asked about their experience at work and knowledge of AIDS/HIV. The majority had already encountered AIDS-related issues in the context of their work. On the whole, they were well informed about AIDS/HIV, although specific gaps in their knowledge were identified. It is recommended that provision be made for the training of family therapists in this area.     

Does Drawing Attention to the Referent Constrain the Way in Which Children Construct Verbal Messages?

Tasks which assess children's speaker skills in the referential communication paradigm frequently mark the target item in some way to indicate which picture should be described. It was hypothesized that this procedure would interfere with effective scanning of the visual array (comparison processing) assumed to be necessary for the production of accurate messages. It was also predicted that, when one item was highlighted, more redundant features would be included in messages. An experiment which compared a marked with an unmarked target condition across three age ranges (6, 8, 10 years) found that message accuracy was not affected by highlighting. But significantly more redundant features were reported in the marked condition, indicating that, where redundancy is the focus of interest, a highlighting procedure should be avoided. Two age effects were also found: Message accuracy improved with age, while redundancy reduced with age.     

Patterns of parent perception differentiating clinic from nonclinic children

The responses of 393 parents of clinic-referred and welladjusted children to the Children's Behavior Checklist were analyzed. Of 154 items, 66 proved to discriminate between clinic and nonclinic groups. Many of these items were reflective of the general dimensions of Competence and Impulsivity yielded by an overall factor analysis. More specific patterns of factors emerged for subgroups of parents. Interparent agreement in perception was found to be a complex function of a child's age, sex, and adjustment level. The implications of the results for clinical assessment of children and families and for studies of parentchild relations are discussed.