Working memory, psychiatric symptoms, and academic performance at school

Previous studies of the relationship among working memory function, academic performance, and behavior in children have focused mainly on clinical populations. In the present study, the associations of the performance in audio- and visuospatial working memory tasks to teacher reported academic achievement and psychiatric symptoms were evaluated in a sample of fifty-five 6-13-year-old school children. Working memory function was measured by visual and auditory n-back tasks. Information on incorrect responses, reaction times, and multiple and missed responses were collected during the tasks. The children's academic performance and behavioral and emotional status were evaluated by the Teacher Report Form. The results showed that good spatial working memory performance was associated with academic success at school. Children with low working memory performance, especially audiospatial memory, were reported to have more academic and attentional/behavioral difficulties at school than children with good working memory performance. An increased number of multiple and missed responses in the auditory and visual tasks was associated with teacher reported attentional/behavioral problems and in visual tasks with teacher reported anxiety/depressive symptoms. The results suggest that working memory deficits may underlie some learning difficulties and behavioral problems related to impulsivity, difficulties in concentration, and hyperactivity. On the other hand, it is possible that anxiety/depressive symptoms affect working memory function, as well as the ability to concentrate, leading to a lower level of academic performance at school.     

The Effects of Supervisor's Race and Level of Support on Perceptions of Supervision

The effects of supervision support and supervisor race were examined in a 2 × 2 factorial design (high vs. low support × African American vs. Caucasian supervisor), with the inclusion of a no-supervision control condition. Sixty Caucasian women served as counselors in two counseling sessions with a confederate client. They were supervised by 1 of 6 experienced supervisors—3 African American and 3 Caucasian. Dependent variables included measures of counselor anxiety, perceived performance, satisfaction, and perceptions of the supervisory relationship. Results revealed a significant main effect for supervisor level of support but no significant effects for supervisor race. Implications of the findings and directions for future research are discussed.     

Relation between police image and police visibility

The purpose of this study was to build a model for the public image and visibility of the police. These variables were seen as central to successful community policing. Explanatory variables included were contacts with the police, victimisation and background characteristics of the respondents. Questionnaire data were obtained from a sample of 3271 adults (mean age 42) and 986 youngsters (mean age 15.5) in two Finnish cities. Using multi‐sample structural equation modelling, a four‐factor model with two image factors (Friendliness and Closeness) and two visibility factors (Patrol‐Car‐Related and Police‐on‐Foot Activities) was confirmed by the data. As hypothesised, for both adults and youngsters, seeing police‐on‐foot activities was positively correlated with both image factors, while seeing Patrol‐Car‐Related Activities was negatively correlated with police image. Relationships of explanatory variables with image factors were to a large extent but not completely mediated by the visibility factors. Some differences were found between adults and youngsters in factor means and in regression relationships. Quality of police visibility proved to be an important factor from the point of view of community policing, in which one of the main purposes is to improve the relationship between the police and the public. Copyright © 2000 John Wiley & Sons, Ltd.     

A microcomputer system for controlling classical conditioning experiments

A microcomputer-based laboratory system for controlling stimulus presentations and data acquisition in classical conditioning experiments is described. The system comprises an Intel 386/486-based microcomputer and a commercially obtained low-cost counter/timer board with input/output lines for stimulus timing and external device control. A simple, yet versatile custom-designed structured programming language is provided for performing an unlimited number of stimulus configurations and their sequences. In electrophysiological studies, the system can be flexibly connected to computer-controlled signal conditioning systems for the amplification and filtering of multiunit and evoked field potential responses and to high-speed data acquisition systems for sampling and analyzing the responses. The costs of reserving an entire microcomputer for experiment control are well compensated for by the simplicity and efficiency of programming and transportability of the control protocols between different setups and laboratories. Furthermore, a data acquisition and analysis system most suitable for the aims of a research project can be selected.     

Who is there? Captive western gorillas distinguish human voices based on familiarity and nature of previous interactions

Animal Cognition - The ability to recognize conspecifics by their acoustic signals is of crucial importance to social animals, especially where visibility is limited, because it allows for...