Age differences in integration of components of a motor task.

To study effects of practice on the ability of 6-, 11-, and 18-yr.-old Ss to integrate the components of the Rho task 3 groups of 50 boys performed 30 consecutive trials. (a) With practice all age groups improved in total movement time; (b) 11-yr.-old Ss attained the 18-yr.-olds' level of performance in both components, initial differences existing only the linear component; (c) relative to the 18-yr.-old Ss, the 6-yr.-olds achieved proportionally less improvement in the linear component; (d) unlike 11- and 18-yr.-old Ss, the 6-yr.-olds evidenced increasing specificity of task components across trials. Unlike the two older age groups, the 6-yr.-old Ss were unable to achieve a high degree of integration of task components. The findings were discussed in light of Pascual-Leone's neo-Piagetian model of learning and development.     

Workplace justice outcomes as a function of adversaries' gender composition: A field assessment

There is extensive documentation that the sex of organizational members may bias a wide variety of managerial decisions and workplace outcomes. While such effects have been persuasively demonstrated, the sex context of these effects has received little attention. It is argued here that it is not merely the sex of the actor, but the nature of the dyadic match (male/male; female/female; male/female; female/male) that is a critical influence on outcomes. This hypothesis is strongly supported by gross differences in workplace justice outcomes based on the dyadic composition of the actors involved in dispute proceedings (n=369) in a field setting. These results are tempered, however, inasmuch as analysis also indicates differences in the severity of disputed issues across these dyadic compositions.     

The effect of induced compliance on relative left frontal cortical activity: a test of the action‐based model of dissonance

The action‐based model of dissonance and recent advances in neuroscience suggest that commitment to action should cause greater relative left frontal cortical activity. An induced compliance experiment was conducted in which electroencephalographic activity was recorded following commitment to action, operationalized with a perceived choice manipulation. Perceived high as compared to low choice to engage in the counterattitudinal action caused attitudes to be more consistent with the action. Also, high choice caused greater relative left frontal cortical activity than low choice. Copyright © 2006 John Wiley & Sons, Ltd.     

Memory distortions and anxiety in alcoholism: a directed-forgetting investigation

Alcohol-dependent individuals and healthy social drinkers differ in their physiological, cognitive, and subjective reactivity to alcohol-related stimuli, the mnesic accessibility of alcohol-related concepts, inhibition abilities, or mnesic performance (F. Ryan, 2002; F. Stetter, K. Ackerman, A. Bizer, E. R. Straube, & D. Mann, 1995). The author investigated (a) cognitive inhibition abilities of alcohol-dependent individuals, particularly for alcohol-related words, and (b) the relationship between anxiety and cognitive activation of alcohol-related concepts in alcohol-dependent individuals by using the directed-forgetting paradigm item-by-item and list procedures. The author used a 2 (Alcohol Consumption: alcohol-dependent individuals vs. social drinkers) x 2 (Word Type: neutral vs. alcohol-related) design. Alcohol-dependent individuals had significantly more difficulty than did social drinkers in voluntarily inhibiting alcohol-related verbal stimuli. This effect seems to be general and nonspecific in alcoholism. In alcohol-dependent individuals, a high level of state anxiety was associated with significant difficulties in inhibiting alcohol-related verbal stimuli. Results suggest that anxiety is a key feature in alcoholism, facilitating the activation of alcohol-related concepts in semantic memory.     

Accommodation to Increased Accuracy Demands by the Right and Left Hands

This study was designed to identify the phase of rapid aimed movements responsible for hand differences in motor skill, and to evaluate potential differences between the hands in accommodating to greater accuracy demands. In both experiments, an accelerometer mounted on a stylus allowed key changes in acceleration to be used to partition the movement into phases. In Experiment 1, slower left hand movement times were attributable primarily to a terminal homing-in phase, especially as target size decreased. Since error rates varied as a function of hand and target size, speed-accuracy trade-offs may have occurred. Experiment 2 rigidly controlled error rate and confirmed the major hand difference to occur in the latter phase of the movement where error correction is presumed. Although less pronounced, adjustments were made in the earlier movement phases as well. Accommodation to greater accuracy demands involved moving the stylus closer to the target before decelerating to engage in error correction. This adjustment to gain enhanced precision was more pronounced in the left hand.