A large body of research has depicted relative arousal of the left and right cerebral hemispheres as related to utilization of particular defensive coping styles, level of anxiety, and perceptual styles. The right and left hemispheres are also presented in the literature as differing in visual-spatial and verbal-auditory short term memory abilities. The present research studied 127 right handed undergraduates' relative performance on forward spatial and digits memory spans in relation to hemispheric lateralization and other perceptual and personality variables hypothesized in the literature to be related to hemispheric arousal. It was hypothesized that the forward spatial and digit memory spans would display asymmetrical sensitivity to hemispheric arousal. That is, in a series of successive factor analyses, a hemispheric balance factor, a trait anxiety factor, and a short term memory factor would emerge. The three factors were hypothesized to be unrelated to each other. During an initial group pretesting, subjects were given pencil and paper measures of handedness, trait anxiety, and several defensive coping styles. During a second individual testing, subjects were administered measures of short term memory, field independence, and a computerized presentation of geometric designs which measured the subjects ability to detect differences which occurred at either the …

This study was designed as an attempt to extend Schneider and Shiffrin's (1977) automatic versus controlled processing distinction into the area of visual perception. Hasher and Zacks (1979) proposed a continuum of automatic processes, with processes which encode the fundamental aspects of the flow of information as the anchor of the continuum. They presented evidence that depressed people perform more poorly than nondepressed on effortful (controlled) memory tasks, but not on automatic tasks. Tachistoscopic and free inspection presentation of Piaget's (1961/1969) primary geometric illusions meet two of Hasher and Zack's criteria for automatic and effortful tasks, respectively. Consequently, multiple regression techniques were used to determine the relationship between depression (operationally defined as score on the Beck Depression Inventory) and method of presentation of a Piagetian primary illusion, the Müller-Lyer. Furthermore, correlations were determined between tachistoscopic versus free inspection of the Müller-Lyer illusion and forward versus backward digit span (operationally defined as score on the WAIS Digit Span subtest), since forward and backward digit span have been linked theoretically to automatic and effortful processing, respectively.