Effects of visual-field and matching instruction on event-related potentials and reaction time

Vertical letter pairs were presented randomly in the left and right visual hemifields in a physical identity match and name identity match condition. The reaction times showed a right visual field superiority for name matches, and a left visual field superiority for physical matches. Event-related potentials to letter pairs showed a sequence of three waves: a negative wave (N2, around 270 msec), a positive wave (P3, around 500 msec), and a broad positive slow wave (SW, around 600-700 msec), respectively. P3 and SW amplitudes were consistently larger at the left hemisphere than at the right hemisphere, regardless of the field of stimulation. At both hemispheres, N2 waves were always larger to stimuli presented in the visual field contralateral to a hemisphere than stimuli presented in the visual field ipsilateral to a hemisphere. The positive waves (P3, SW) showed the opposite pattern: smaller amplitudes to stimuli that were presented contralaterally than stimuli that were presented ipsilaterally to a given hemisphere. These results were attributed to a shift in sustained negativity on the directly stimulated hemisphere, relative to the indirectly stimulated hemisphere, reflecting either sensory at attentional processes in the posterior cerebral hemispheres.     

Sex typing and the coronary-prone behavior pattern

The purpose of this study was to examine the relationship between sex-role orientation and the coronary-prone behavior pattern [Type A]. Ninety-six males and eighty-four females were administered the Bem Sex Role Inventory and the student version of the Jenkins Activity Survey. The results showed that, irrespective of sex, Type A subjects were significantly more instrumental (masculine) and less expressive (feminine) than Type B subjects. Consistent with previous research females were found to be more expressive than males; however, the sole predictor of instrumentality was A/B classification. The potential significance of these findings for refining predictions of coronary artery and heart disease is discussed and recommendations for future research are offered.Portions of this paper were presented at the Third Annual Meeting of the Society of Behavioral Medicine, Chicago, March 1982.     

Andisp: A Turbo pascal program to analyze and display sampled data

ANDISP is a Turbo Pascal program that analyzes, displays, and manipulates sampled data recorded with a PC-compatible data-acquisition system The data analysis routines include “integrate/differentiate a channel”, “rectify,” “smooth,” “filter,” and “add/sub/mult/div a channel by a constant, ” as well as a routine that gives some basic statistics. The data manipulation routines are “copy a channel” or “copy the data buffer to a file.” The versatile display routine can give either oscilloscope-type displays of a data channel or plots of pubUshable quality. Hardware requirements are an IBM-compatible microcomputer and an EGA color monitor.     

The variety of consequence,according to Bolzano

Contemporary historians of logic tend to credit Bernard Bolzano with the invention of the semantic notion, of consequence, a full century before Tarski. Nevertheless, Bolzano's work played no significant rôle in the genesis of modern logical semantics. The purpose of this paper is to point out three highly original, and still quite relevant themes in Bolzano's work, being a systematic study of possible types of inference, of consistency, as well as their meta-theory. There are certain analogies with Tarski's concerns here, although the main thrust seems to be different, both philosophically and technically. Thus, if only obliquely, we also provide some additional historical perspective on Tarski's achievement.