Within-Person Variability in Response Speed as an Indicator of Cognitive Impairment in Older Adults

ABSTRACT

Within-person variability may be an important indicator of central nervous system compromise. In this study, within-person variability in response speed was examined in community-dwelling older adults, ages 64–92 years, using a new framework that takes into account both the extent (single versus multiple domains affected) and nature (amnestic versus non-amnestic) of the cognitive impairment. Those with multiple domains of impairment were more variable than those who showed an isolated area of impairment, regardless of whether memory was one of the domains affected. Further, for those with difficulties in two or more non-memory domains, increased variability was most evident in more cognitively demanding situations, when individuals had to manipulate information held briefly in mind, switch cognitive set or inhibit an automatic response. Finally, group differentiation was better achieved when within-person variability as opposed to mean speed of performance was considered.     

A Developmental Inquiry into the Effects of Postevent Information on Eyewitness Accounts

Children in the first through eighth grades (n = 128) and college students (n = 32) viewed a film depicting an automobile collision and were subsequently asked to estimate the speed of one of the vehicles. The results indicated that the phrasing of the question significantly affected the subjects' speed estimates. Specifically, subjects at all grade levels provided significantly higher speed estimates when the adverb fast, as opposed to slow, was used. Subjects in the seventh and eighth grades gave higher speed estimates when the verb smashed was used than when hit was used. This latter effect did not occur at other grade levels sampled.     

Replication of the factor structure of the fear of AIDS schedule (FAIDSS) across samples

Abstract

The stability of the Fear of AIDS Scale (FAIDSS) was studied using three samples (two samples of health workers and one of social work students) on Cattel's s index. Using hyperplane cutoffs between 0.35 and 0.45, on the five factor solution of the FAIDSS, there were significant correlations between factors across samples and with few exceptions each factor correlated significantly with only one factor in its comparison samples. Concurrent validity was demonstrated by comparing scores on the Attitudes toward AIDS scale with the FAIDSS. Data indicated that the FAIDSS structure was stable across samples and is an appropriate instrument for measurement of fear of AIDS in the helping professions.     

Health-related behaviours and their correlates in a general population sample of 45-year old women

Abstract

Preventive strategies for menopausal women to reduce the risks for osteoporosis and cardiovascular disease has been the focus of considerable attention, but understanding of mid-aged women's behavioural risk factors for these diseases is meagre. The current study describes a range of health-related behaviours and their psychosocial correlates, in a sample of 45-year old women, recruited from five general practices and assessed by postal survey (N=106, response rate 60%). Results suggest that health promotion for this group might best focus upon increases in regular exercise, calcium intake and breast awareness, and decreases in cigarette and caffeine consumption. The behaviours assessed were generally not inter-related. However, several associations were identified between behaviours and health and psychosocial variables. The main ones were the association between menopausal status and smoking, and the relationship between body weight, self-esteem and physical exercise. It is argued that the menopause transition can be an opportunity for preventive work.     

Real Men Don’t Make Mistakes: Investigating the Effects of Leader Gender, Error Type, and the Occupational Context on Leader Error Perceptions

Purpose

Despite the fact that leaders make mistakes, little attention has been paid to the effects of errors on subordinate perceptions. This study investigated the influence of errors on perceptions of leader competence, effectiveness, and desire to work for the leader. It also examined the effects of gendered expectations on perceptions of male and female leader errors by investigating the interactions that occur between the leader’s gender, the type of error, and the occupational context.

Design/Methodology

A sample of 284 undergraduates read a series of fictional employee emails describing a leader’s behavior and responded to several measures while envisioning themselves as subordinates of the leader.

Findings

Results suggested task and relationship errors exert damaging and differential effects on perceptions of leader task and relationship competence, respectively, and equally damage desire to work for the leader. Male leaders were perceived as less task and relationship competent, desirable to work for, and effective than female leaders for committing errors in a masculinized domain.

Implications

This study suggests leader errors matter, and that current leadership models ought to be expanded to account more clearly for them. Moreover, it offers insight into the role of gendered expectations in determining perceptions of male and female leader errors.

Originality/Value

This study is one of the first to empirically examine leader error perceptions and the effects of gender stereotypes on these perceptions. It represents a step toward understanding evaluations of male and female leaders, not when they succeed, but when they make mistakes.     

Attention and Executive Function Deficits in Adolescent Sex Offenders

Thirty male adolescent sex offenders and 20 age-matched male adolescents completed an extensive battery of attention and executive function tests. Controls were obtained from adolescents from a socially and economically deprived background, typical of the offending group. The attention battery was based on Mirksy, Anthony, Duncan, Ahearn, and Kellam (1991) and the executive function battery on Kelly (2000a). Successful matching for IQ was not achieved and therefore ANCOVA comparisons were made between the groups, with IQ as the covariate. In attention a highly significant difference was found on the focus-execute factor and a significant difference on the shift factor. In executive function there was a highly significant difference only on the response speed factor. In all cases better abilities were demonstrated by the control group. The importance of thorough neuropsychological investigation in the clinical assessment of this forensic group is supported. The clinical implications of neuropsychological deficits in terms of risk assessment and clinical management are discussed.     

Analysis of effects of driver/vehicle characteristics on acceleration noise using GPS-equipped vehicles

Researchers have used acceleration noise, defined by the standard deviation of accelerations of a vehicle, as an attempt to measure the quality of traffic flow. As a potential indicator of traffic flow quality, acceleration noise has been considered to be capable of reflecting vehicle/driver–roadway–traffic interactions within a traffic stream. However, this proposition, in particular for the driver/vehicle, has seldom been investigated, mainly due to the difficulty of data collection. This paper reports the results of an analysis of the effects of driver/vehicle characteristics on acceleration noise using global positioning system (GPS)-equipped instrumented vehicle data obtained from four freeway segments. In the analysis, speed models were developed and compared with acceleration noise models. In addition, the effects were investigated by traffic condition levels defined by the density-based level of service.     

The Mechanisms Involved in the Behavior of White Rats on the Inclined Plane

Semantic tasks, such as lexical decision making and word recognition, have not produced a mood priming effect. Earlier studies have been criticized because they included (a) mood induction techniques that required instruction to feel the mood, and (b) the use of overleamed tasks that did not require controlled processing. In this pair of experiments, the authors attempted to address these criticisms. However, the results of this study did not demonstrate a mood priming effect for happy and sad subjects who appraised sentence content as being happy or sad. The results of this study supported the dissociation of semantic and episodic memory.