Evaluation of a sound-generator chip: The AY 3-8910

Despite the continuing decrease in computer prices, psychoacoustic research is still expensive because of the high cost of sound-generation equipment and software. A single-chip sound generator was evaluated as an inexpensive tone/noise generator, amplitude attenuator, envelope modulator, and sound mixer. Although the chip has some limitations, it offers important advantages for pilot research and laboratory demonstrations.     

Distinguishing between cognitive and somatic trait and state anxiety in children

The study was conducted to develop self-report measures of cognitive and somatic trait and state anxiety for children and to evaluate the utility of distinguishing between cognitive and somatic anxiety. Sixty-seven fourth grade children anticipated and then performed a mathematics task either in a high- or low-stress condition. While the children anticipated performing the task, measures of seven cognitive behaviors were obtained by means of both a think aloud procedure and a questionnaire. The results of the study indicated that reliable trait and state measures of cognitive and somatic anxiety were successfully developed. Further, the trait measures of cognitive and somatic anxiety were found to be relatively impervious to induced anxiety states. As expected, cognitive trait anxiety but not somatic trait or state anxiety was found to be related to task performance. High cognitive state and/or trait anxiety was found to be associated with more preoccupation and performance denigration as well as taking less of an analytic attitude toward the situation. Somatic trait and state anxiety were found to be associated with preoccupation. In general, the results support the construct validity of the measures developed and the utility of distinguishing between cognitive and somatic anxiety in children.     

Risk-sensitive foraging theory and operant psychology.

Hastjarjo, Silberberg, and Hursh (1990) have presented data on the foraging behavior of rats and discussed it in terms of risk-sensitive foraging theory. Because risk-sensitive foraging theory is comprised of several different models, it does not lead to general predictions about when an organism should prefer a foraging option with high variance to a foraging option with low variance. Any comparison of data with the predictions of the theory must be based on an appropriate model. I draw attention to various experiments that are potentially relevant to the results reported by Hastjarjo et al. and show how the time period over which the organism must survive can influence a model's predictions about risk sensitivity.     

Counterfactual Production and Achievement Orientation in Competitive Athletic Settings1

Two studies examined the impact of achievement orientation on counterfactual production in competitive sporting situations. In Study 1, participants created counterfactuals after reading 4 vignettes. Results indicated that participants reading about winners created more subtractive and downward counterfactuals than did participants reading about losers, while participants reading about losers created more additive and upward counterfactuals than did participants reading about winners. In Study 2, using participants in 3-on-3 basketball games, achievement orientation interacted with game outcome to produce adaptive responses for participants who held a mastery orientation and maladaptive responses for participants who held an outcome orientation. In addition to achievement orientation, the margin of victory played an important role in determining the type of counterfactual produced. The implications of these findings are discussed.