RIGHT-HEMISPHERE MEMORY SUPERIORITY:

Abstract— Six experiments explored hemispheric memory differences in a patient who had undergone complete corpus callosum resection. The right hemisphere was better able than the left to reject new events similar to originally presented materials of several types, including abstract visual forms, faces, and categorized lists of words. Although the left hemisphere is capable of mental manipulation, imagination, semantic priming, and complex language production, these functions are apparently linked to memory confusions—confusions less apparent in the more literal right hemisphere. Differences between the left and right hemispheres in memory for new schematically consistent or categorically related events may provide a source of information allowing people to distinguish between what they actually witnessed and what they only inferred.     

The Negotiated Allocation of Benefits and Burdens: The Impact of Outcome Valence, Contribution, and Relationship

This laboratory study investigates negotiated allocations of benefits and burdens. We compare both the distributive and integrative aspects of negotiation to determine whether benefits and burdens are allocated according to the same norms of distributive justice and how well negotiators integrate their interests. We hypothesize that the distribution of resources depends on the valence of the resources and negotiators′ relative contributions to those resources. We also expect that the efficiency of agreements depends on the valence of resources, the negotiators′ contributions, and the time horizon of their relationships. Results support the hypotheses. Equity is more commonly used to allocate burdens than benefits; agreements for allocating burdens are less integrative than those for benefits; and agreements are more efficient when relationships are long term and subjects contribute unequally to the resources being allocated than when they contribute equally or relationships are short term. We discuss these results in terms of Taylor′s (1991) hypothesis about the asymmetrical effects of positive and negative events.     

Inhibitory stimulus control in concurrent schedules

Six pigeons were exposed to two keys, a main key and a changeover key. Pecking the main key was reinforced on a variable-interval 5-min schedule when the key was blue and never reinforced when the key displayed a vertical line on a blue background. Each peck on the changeover key changed the stimulus displayed on the main key. Each subject was given two generalization tests, consisting of presentations on the main key of six orientations of the line on the blue background, with no reinforcements being given. In one test changeover-key pecks changed the stimulus; in the other test the changeover key was covered and the experimenter controlled stimulus changes. Both responses to the six stimuli and time spent in the presence of the stimuli gave U-shaped gradients when the changeover key was operative. With most subjects, absolute rates of responding to each stimulus produced unsystematic gradients, whether or not the changeover key was operative.     

Gender and survival vs. death in slasher films: A content analysis

The content of slasher films was examined, focusing on what portion of the violence is directed toward and committed by women vs. men and the survival rates, the juxtaposition of sex and violence for male and female victims, and differences between male and female survivors vs. nonsurvivors. Five student coders analyzed 56 slasher films (474 victims). Female and male victims were portrayed equally frequently in these films. Male characters were as likely to die as female characters as a result of the attack; however, more female than male characters survived the attacks. The slashers were primarily men. Sexiness was paired with nonsurvival of female victims, whereas male nonsurvivors were portrayed as possessing negative masculine traits. The reinforcement of the good vs. bad woman dichotomy and the portrayed cost of unmitigated extreme masculinity in men in slasher films are discussed.The authors wish to thank four coders — June Cline, Susan Malinowski, Camille Mayers, and Misty Sherman — for their work in coding the slasher films.     

THE REPRESENTATIVENESS OF OBSERVATIONAL SAMPLES OF DIFFERENT DURATIONS

The representativeness of behavioral observation samples with durations of less than the whole time of interest was investigated. A real-time recording system was developed to quantify the behavior of 5 profoundly mentally retarded physically handicapped adult students in an institutional training setting. Behavior was observed using six mutually exclusive and exhaustive categories during 2.5-hr observation sessions. Sample observation sessions with durations ranging from 15 to 135 min were computer simulated from the whole-session (150-min) records. It was found that the representativeness of these samples, when compared to whole-session records, was a function of the relative duration of the behavioral categories and of sample duration. The occurrence of relatively high-duration behaviors (lasting for more than 50% of the session) was estimated to within 20% error by samples of less than 60 min, but low-duration behaviors (1 to 3% of the session) were inadequately quantified even from 135-min samples. Increasing irregularity of bouts of behavior in the low-duration behaviors is suggested as the cause of the functions obtained. Implications of the findings for applied behavior analysis are discussed, with the recommendation that the adequacy of observational session durations be empirically assessed routinely.     

Perceived Control and Psychological Adjustment in Gay Men With AIDS1

The relationship of control beliefs to psychological adjustment was investigated in a sample of 24 gay men diagnosed with AIDS, participants in the University of California, Los Angeles site of the Multicenter AIDS Cohort Study (MACS). Distinctions between generalized contingency beliefs and specific competence beliefs and between personal and vicarious control beliefs were included in the questionnaire and interview measures administered. The results support these distinctions and indicate that beliefs in personal control over day-to-day symptoms and over course of illness were positively related to adjustment, whereas beliefs in control by others over course of illness and over medical care and treatment were negatively related to adjustment. These relationships appeared to be strongest for men who reported poorer health. These associations were not accounted for by locus of control beliefs, negative affectivity, or time since diagnosis with AIDS.     

Mother parity as a main and moderating influence on early mother-infant interaction

This study investigated main and moderating effects of mother parity on maternal attitudes and behaviors. In a sample of 87 mothers with 5-month-old infants, relations between determinants of parenting (maternal personality, marital quality, infant negative emotionality) and maternal behavior and attitudes (sensitivity, self-efficacy, mother-reported infant temperament) were examined as a function of parity. Results revealed both main and moderating effects of parity. Multiparous mothers reported higher self-efficacy, whereas primiparous mothers reported more of an increase in marital ambivalence following the baby's birth. The relations of self-efficacy, sensitivity, and mother-reported infant temperament to a laboratory measure of infant crying all differed by parity. In addition, for primiparous mothers, negative personality traits related to reported infant temperament, and for multiparous mothers, marital ambivalence and maternal sensitivity appeared to reflect a compensatory process. These results suggest that parity contributes to explaining how differing family systems influence development during infancy.