Maternal gestational stress alters adaptive and social behavior in adolescent rhesus monkey offspring

Data from rodent studies have indicated that stress experienced by pregnant mothers may result in behavioral and biological abnormalities in their offspring. However, few studies have examined the effects of prenatal stress on the offspring beyond the childhood period. In this study, 7 prenatally stressed (PNS) monkeys and 7 monkeys from undisturbed pregnancies were tested under mildly challenging conditions at 4 years of age. Following separation from cagemates and group formation, PNS monkeys showed more locomotion, abnormal and disturbance behavior than controls. Controls showed approximately six times more play than PNS animals. The PNS males showed the most clinging to others and the largest increase in contact with other animals over the period. Group differences were also found when the monkeys were observed as groups or alone in a playroom. Controls showed more explanatory behavior in the playroom, whereas PNS monkeys showed more inactivity. Control animals showed a decrease in distress vocalizations over time in the playroom, whereas PNS animals showed the opposite pattern. Control animals spent more time in proximity to and contact with cagemates than PNS animals. These results indicate that prenatal stress can have effects on adaptive and social behavior that persist into adolescence.     

A feminist critique of family therapy

This paper is a feminist critique of traditional family therapy considering the cybernetic epistemology underpinning it as a particular way of seeing the family. The political implications of this way of seeing d be considered in tern of structural inequalities with a preference for, the intergroup perspective. There will be a close examination and discussion of the one parent family structure. The discussion will then move one a practical evaluation of the ecosystemic view of helping families, in particular single parent families.     

Examination of the Relationship Between Self-Efficacy and Affect at Varying Levels of Aerobic Exercise Intensity

Although proposed as an explanation for increases in positive and decreases in negative affect, little evidence supports the notion of a stronger efficacy-affect relationship as acute aerobic exercise intensity increases. Relationships between self-efficacy (SE), positive affect (PA), and negative affect (NA) were examined with respect to 3 randomly assigned conditions: (a) no exercise (control), (b) cycling at 55% VO_2max, and (c) cycling at 70% VO_2max. Twenty subjects (age = 22.6 years; M VO_2max= 47.8 ml · kg⁻¹· min⁻¹) participated in each. Preexercise SE predicted in-task NA and postexercise PA in the 55% condition and postexercise PA in the 70% condition ( ps < .05). Although SE significantly increased from pre- to postexercise, in-task affect failed to predict these increases in SE. These data suggest that in a fit college-aged population, a stronger reciprocal relationship between preexercise SE, in-task affect, and postexercise SE does not exist with increasing levels of exercise intensity. Contrary to self-efficacy theory, no evidence was found for a reciprocal relationship. However, the relationship between efficacy and affect was such that when collapsed across conditions and time, subjects with higher SE scores reported lower NA ( p < .05).     

Mental animation in the visuospatial sketchpad: Evidence from dual-task studies

We used the dual-task paradigm to provide evidence that inferring the motion of a component of a mechanical system (mental animation) is a spatial visualization process. In two experiments, participants were asked to solve mental animation problems while simultaneously retaining either a visuospatial working memory load (a configuration of dots in a grid) or a verbal memory load (a list of letters). Both experiments showed that mental animation interferes more with memory for a concurrent visuospatial load than with memory for a verbal load. Experiment 1 also showed that a visuospatial working memory load interferes more with mental animation than does a verbal memory load. Furthermore, Experiment 2 showed that mental animation interferes more with a visuospatial memory load than does a verbal reasoning task that takes approximately the same amount of time.     

Visual imagery and verbalization with simple tachistoscopic displays

Two experiments, designed to compare the perception and retention of tachisto-scopic displays of four block capital letters and four simple “nonsense” figures are described. The results show that the letters were much better remembered and suggest that this was mainly due to the ease with which they were verbalized. The nonsense figures usually gave rise either to rapidly fading “iconic” images, or to an unstable kind of mixed imagery which was difficult to describe or remember, but in which inadequate verbalization was often a source of error. Subsidiary experiments illustrate the importance, not only of verbalization, but also of symmetry and simplicity in remembering visual display.     

Reconsidering the Role of Attitudes in Exercise Behavior: A Decision Theoretic Approach1

Two studies demonstrated that subjective expected utility (SEU) theory predicted interest in, but not adherence to, a weightlifting exercise program. The studies also showed that attitudes were related to adherence for certain individuals. Specifically, attitudes toward not weightlifting were related to the number of days experienced subjects weightlifted. In addition, in Study 1, experienced subjects had more positive attitudes toward weightlifting and more negative attitudes toward not weightlifting than did inexperienced subjects, and the two groups differed on a number of underlying beliefs. Similarly, in Study 2, experienced subjects had more positive attitudes toward weightlifting and differed from inexperienced subjects on a number of underlying beliefs. These results are discussed in terms of their implications for several issues: the usefulness of SEU theory in the exercise domain; the importance of considering attitudes toward alternative courses of action (including inaction) when attempting to predict exercis–or any other–behavior; the need to distinguish between exercise adoption (initiation) and maintenance (adherence); and the importance of Beach's (1982, 1985) distinction between deasion making and decision implementation.     

Displaced aggression: Frustration or impression management

An experiment is reported testing an impression management interpretation of previous research demonstrating displaced aggression effects. It was found that superior performance by a confederate and not annoyance was related to increased use of shocks by subjects. Path analyses provided additional support for an impression management interpretation of these results, and disconfirmed frustration-aggression theory.