Hand preference and its flexibility according to the position of the object: a study in cercopithecines examining spontaneous behaviour and an experimental task (the Bishop QHP task)

The extant literature on manual laterality in non-human primates is inconclusive, plagued by inconsistent or contradictory findings and by disturbing methodological issues (e.g. uncontrolled influential factors, comparability issues). The present study examined hand preference and its flexibility in 15 red-capped mangabeys (C. t. torquatus) and 13 Campbell's monkeys (C. c. campbelli), two species that differ in their degree of arboreality. We investigated the influence of the spatial position of the object on hand preference for reaching. We considered spontaneous behaviour (reaching for food during daily feeding) and an experimental task: the QHP task. The QHP is a task that is used in humans. This is a simple reaching task that involves high spatial constraints on hand use. In our study, the subject had to reach for items that were placed on a semi-circle in front of it on five positions, including in the centre position, in the ipsilateral space and in the contralateral space. We assessed hand preference for reaching in front (baseline condition), and we examined how this preference changed when reaching in lateral positions. For reaching in front, about half of the subjects were lateralized and no group-level bias occurred, for both spontaneous and experimental conditions. When considering reaching in the lateral positions, we observed that the position of the object influenced hand use: individuals used the hand that was closest to the object. The results are discussed in relation to previous findings in humans and in non-human primates and regarding theories on handedness and flexibility of hand preference.     

AIDS and intimate relationships: Adolescents’ knowledge and attitudes

The knowledge level about HIV/AIDS among American adolescents aged 16 to 19 has been assessed on several occasions, showing that in recent years their knowledge base has improved. The knowledge bases of British adolescents and of adolescents younger than 16 have been largely ignored. In attempting to assess the likely impact on present or future behaviors of increasing adolescents’ knowledge base about AIDS it is important to also know something of adolescents’ attitudes to intimate relationships and to sex within those relationships. Previous studies have not linked these two aspects. In this study two hundred London schoolchildren aged 14 and 15 years completed a questionnaire tapping both their knowledge about HIV infection and its transmission and their attitudes to intimate relationships. Their answers revealed that they had absorbed the simple media messages about AIDS, that it kills and that use of a condom during sex offers protection. However they were less well informed on detailed aspects of prevention, although, worryingly, they believed that they knew all that they needed to about preventive measures. The majority had attitudes to intimate relationships that were compatible with the message of restricting their number of sexual partners; however, a significant minority did not. The latter were more likely to deny the risk associated with promiscuity. It is suggested that school-based AIDS education programs should help individuals to develop new attitudes to intimate relationships that are compatible with risk avoidance.     

Comparative effects of externally managed and self-managed response-cost systems on inappropriate classroom behavior

This study compares the relative efficacy of externally managed and self- managed free token response-cost systems in decreasing the inappropriate behavior of two learning-disabled students. The differential effects of the two treatment conditions were assessed by using an alternating treatments design. Experimental control was demonstrated by adding reversal phases comparing the treatments with baseline conditions. The results indicated that the two treatment conditions are equally effective in decreasing inappropriate behavior. The reasons for and implications of the findings are discussed.     

Autobiographical memory and perceptual learning: A developmental study using picture recognition,naming latency,and perceptual identification

Memory &; Cognition - In this paper, we report four experiments aimed at extending the distinction between recognition memory and perceptual memory introduced by Jacoby and Dallas (1981). In...     

Parent-identified problem preschoolers: Mother-child interaction during play at intake and 1-year follow-up

Parent-referred 2- and 3-year-olds and controls, participating in a longitudinal study of hyperactivity and related behavior problems, were observed with their mothers during play at an initial assessment and a 1-year follow-up. Mothers of problem children provided more redirection initially and made more negative control statements at follow-up than mothers of controls; problem youngsters tended to play more aggressively. Sex differences were prominent. Mothers of boys, regardless of referral status, were more directive at the initial assessment; their sons were less cooperative and somewhat more aggressive in their play. Maternal involvement in play decreased over time, possibly as a response to developmental changes in children's play. Group by time interactions indicated that mothers of control children provided fewer negative control statements at follow-up relative to mothers of problem children and to their own levels at the first assessment; mothers of problem youngsters redirected their children less than they had initially. Mothers of boys were also less directive at follow-up relative to their initial levels. Situational and developmental factors are discussed briefly.     

Pre-employment honesty testing: Fakability,reactions of test takers,and company image

Two common employer concerns about pre-employment honesty testing were addressed: fakability and the test taker's reaction to such tests. Students, 84% with work experience in industries where honesty tests are common, took an honesty test under one of three instructional sets: respond honestly, fake good, and respond as if applying for a job. While subjects instructed to fake good could easily do so, the scores of subjects responding as job applicants more closely resembled those of subjects instructed to respond honestly. Strong negative reactions to honesty tests were not found; rather, most subjects felt that such tests were appropriate. The use of pre-employment honesty tests was not found to have a large impact on test taker perceptions of employers using such tests.     

Instructional control of sex-related motor behavior in extremely masculine or feminine adults

The main purpose of this study was to examine the degree to which apparently sex-typed subjects manipulated behaviors on the Sex Role Motor Behavior Checklist in response to instructions to convey specific sex-role impressions. Extremely masculine and feminine males and females (10–12 per group) were assessed for their ability to change sex-related motor behavior upon request. Subjects were able to produce significant increases in masculine and feminine motor behavior, particularly in the areas of walking and sitting. Many individual behaviors, however, showed small or inconsistent changes. Apparently, many of the motor differences naturally displayed by males and females are either not consciously part of sex-typed adults' concept of given sex roles or are relatively inflexible in this population. Secondary purposes of the study were to identify specific sex-related motor behavior (a) to alter when changes in sex role seem desirable and (b) to utilize as dependent measures in measuring changes in sex role. Walking and sitting were shown to be especially important areas.The authors would like to thank David Millsaps, Reid Smith, Donna Gosnell, Ruth Rankin, and Stephanie Stohr for their assistance.     

EFFECTS OF CONTINGENCY CONTRACTING ON STUDY RATE AND TEST PERFORMANCE1

A contingency contracting program designed to increase study rate and subsequent test performance was implemented with a group of undergraduate psychology students. The function of the contingency contracting program in producing increased study rate was evaluated by individual experiments with each student in an experimental contracting group. The overall effect of the program on test performance was assessed by comparing the final scores for the course earned by the experimental group with those earned by two matched control groups. A reversal procedure established that contingency contracting did significantly increase the study rate of students of a wide range of ability. However, it was selectively effective in improving the test performance of below-average students only. Study rate gains in contracted courses did not generalize to noncontracted courses. Self-recording of study time in the absence of scheduled differential consequences did not improve test performance. Study rate under no-consequence conditions varied with test schedule. For both consequence and no-consequence groups, the correlation between study time and final score for the course was only moderate.     

Gender and Sex as Determinants of Hireability of Applicants for Gender-Typed Jobs

The effects of gender and sex of applicants for gender-typed jobs were investigated in the context of a simulation of a post-interview decision. Student subjects (N=102) rated eight applicants for one of three gender-typed jobs. Results indicated that, in general, masculine applicants (of both sexes) were preferred over androgynous applicants who were preferred over feminine applicants. For the neutral job, androgynous applicants were preferred over masculine applicants who were preferred over feminine applicants. Male and female students did not differ in their ratings of the applicants. The results were interpreted as indicating raters' preference for masculine characteristics in any job applicant.