Human sensory dominance

Human Ss matched an auditory and a visual stimulus for subjective magnitude. Then each stimulus was used as a cue in a reaction time task. On occasions when both stimuli were presented simultaneously, Ss’ responding was seen to be dominated by the visual stimulus. Of further interest was the finding that on some occasions of simultaneous light-tone presentation Ss were unaware that the tone had been presented. This apparent prepotency of the visual over the auditory stimulus was seen to persist across a variety of experimental conditions, which included giving Ss verbal instructions to respond to the tone when both stimuli were presented simultaneously.     

Conditioning of cerebral dysrhythmia induced by Pattern Presentation and Eye Closure

Previous communications from the Epilepsy Center of the University of Wisconsin described the conditioning of certain types of sensory-induced epilepsy. These included stroboscopic-induced seizures, startle epilepsy and musicogenic epilepsy. The present communication adds two types of sensory-evoked seizures treated by conditioning techniques. These additional types are the dysrhythmias induced by pattern presentation and by eye closure. The techniques employed are similar in their main concept to those previously reported. The presentation of a noxious stimulus is altered in such a way as to be innocuous, then is presented repeatedly without producing a seizure. Next, the stimulus is altered gradually until the noxious state is reached. Although these techniques are of value in the treatment of refractory cases of sensory-evoked epilepsy, their major importance is the demonstration that it is possible by the use of behavioral techniques to alter the electroencephalogram and the neurophysiological-neurochemical state which is epilepsy.     

Behavioral effects of caffeine, methamphetamine, and methylphenidate in the rat

It was possible to distinguish three closely-related psychomotor stimulants, caffeine, methamphetamine, and methylphenidate, by means of two operant behavior procedures, fixed interval and fixed number. Under the fixed interval procedure, the percentage change in the number of R_Bs per reinforcement was significantly smaller with caffeine than with methamphetamine or methylphenidate (p < .001). Under the fixed number procedure, the percentage change was significantly smaller with methamphetamine than with caffeine or methylphenidate (p < .001). Thus, methylphenidate had a methamphetamine-like effect under fixed interval and a caffeine-like effect under fixed number.     

Predicting Self-Esteem, Well-Being, and Distress in a Cohort of Gay Men: The Importance of Cultural Stigma, Personal Visibility, Community Networks, and Positive Identity

ABSTRACT Homosexual and bisexual men (N= 825) enrolled in the Multi-center AIDS Cohort Study in Chicago completed a 90-minute self-administered questionnaire that included the Rosenberg Self-Esteem Scale, a Well-Being Index, and the Hopkins Symptom Checklist. Participants indicated their experiences with gay stigma, their visihility as gay men, their involvement in the gay community, and their commitment to a positive gay identity. Data from this predominantly white, young, educated, and tniddle-class cohort are consistent with a structural model in which cultural stigma is negatively asso-ciated with positive self-perceptions. This within-group result contrasts sharply with between group results that indicate our gay cohort was neither particularly low in global self-esteetn nor high in psychological distress when compared to nonstigmatized samples.     

The Effects of Leader Fairness and Pay Outcomes on Superior/Subordinate Relations1

This study assessed the effects of procedurally fair leadership and payment outcomes on subordinate reactions to the supervisor in a pay-for-performance task. Procedurally fair leadership was operationalized by the extent to which supervisors enacted three specific behaviors: facilitation of voice, accuracy, and adherence to formal policies and procedures. The payment outcomes were high and low cash payments for performance evaluated as above or below average. Subordinate reactions to these treatments focused on perceptions of supervisory fairness (both procedural and distributive) and the subordinate's relationship with his or her supervisor (in terms of both satisfaction and commitment). Procedurally fair leadership showed a main effect on subordinate perceptions of leader fairness and on their relationship with the leader. No other effects were noted. Implications are discussed.     

Mystical orientation and personality among anglican clergy

A sample of 222 male clergy completed the short form Revised Eysenck Personality Questionnaire, together with an index of mystical orientation. The data demonstrate a positive correlation between mystical orientation and extroversion, but no relationship between mystical orientation and either neuroticism or psychoticism.     

Cortical dynamics of visual persistence and temporal integration

In a temporal integration experiment, subjects must integrate two visual stimuli, presented at separate times, to perform an identification task. Many researchers have assumed that the persistence of the leading stimulus determines the ability to integrate the leading and trailing stimuli. However, recent studies of temporal integration have challenged that hypothesis by demonstrating that several theories of persistence are incompatible with data on temporal integration. This paper shows that an account of visual persistence given by a neural network model of preattentive vision, called the boundary contour system, explains data on temporal integration. Computer simulations of the model explain why temporal integration becomes more difficult when the display elements are separated by longer interstimulus intervals or are of longer duration or of higher luminance, or are spatially closer together. The model suggests that different mechanisms underlie the inverse duration effects for leading and for trailing elements. The model further predicts interactions of spatial separation, duration, and luminance of the trailing display.