Age changes in electrophysiological measures of the superior colliculus and occipital cortex.

Locomotor activity and electrophysiological recordings of the superior colliculus and the occipital cortex were measured for two age groups of rats (100-105 and 230-235 days old) tested in ambient light and dark sensory conditions. Age differences in response to ambient illumination were observed in both behavioral and electrophysiological data. While no age differences were found for the superior colliculus data, cortical activity of the older rats differed from that found in the younger rats. These results are interpreted in terms of potential cortical development and arousal functions.

The relationship of locus of control dimensions to reported hostility and aggression.

The Fatalism and Social System Control dimensions of the Reid-Ware Three-Factor Locus of Control Scale were correlated with the two main factors of the Buss-Durkee Hostility-Aggression Inventory. For the total sample of 61 male and 96 female undergraduates, both locus of control dimensions correlated significantly with the Hostility factor. Externals on each dimension reported greater hostility than did internals. Only the Fatalism dimension correlated with the Aggression factor, with externals reporting more aggression than internals. For males, only the Fatalism dimension was significantly correlated with the Hostility factor. Both the Fatalism and Social System Control dimensions correlated with the Hostility factor among the females, but the correlation with the latter dimension was slightly stronger. Neither locus of control dimension was correlated significantly with the Aggression factor when data from males and females were analyzed separately.