Sex and sociability in rats

Three experiments explored the effects of sexual motivation and the opportunity for sexual contact on social attraction in rats. Rats were no more gregarious in cross-sex than in same-sex pairings. Increased male sexual experience and hormonally induced female receptivity both led to increased sexual activity but had no effect on social behavior. Males housed with continuously receptive females showed signs of sexual exhaustion but were as gregarious as males housed alone or with males. It appears that social attraction in rats is not motivated primarily by sexual desires, either direct or sublimated.     

Transgression and altruism: A case for hedonism

A model to account for the positive relationship between transgression and altruism was proposed and tested against three alternative formulations—Guilt, Social Justice, and Self-esteem Bolstering. The proposed model, Negative State Relief, asserts that people in a transgression situation behave charitably in order to reduce a general, negative affective state which is induced by exposure to harm-doing and that if the negative state is relieved by some other means, benevolent activity will be rendered unnecessary. All of the experimental subjects were exposed to an act of transgression; half performed the act themselves while half only witnessed it. In one set of experimental conditions (the relief conditions), a positive event—the receipt of either money or approval—was interposed between the harmful act and a fellow-student's request for aid. In another set of experimental conditions (the norelief conditions), no such positive event occurred. It was found, as predicted, that subjects who received a positive event were significantly less helpful than those who did not, but were not different from a control group which had never been exposed to the transgression. It was also found that harm-doers and harm-witnesses were identical in benevolent tendency. The results were interpreted as favoring a hedonistic conception of the nature of altruism. Finally, it was contended that a U-shaped relationship exists between mood state and helping tendency.     

Attributions of causality and reactions to uncontrollable outcomes

The experiment tested the hypothesis that the stress experienced by a person who is unable to control aversive stimulation is not a function of lack of control per se, but of the attribution of causality that (s)he makes for failure to exert control. Subjects were given a problem-solving task, and were told that they could prevent aversive noise bursts by correctly solving the problems. Subjects then received false feedback that they had done either well or poorly on the problems. In addition, failing subjects received information that led them to attribute their performance either to their own lack of ability or to situational factors (task difficulty). Subjects who attributed their failure to their own incompetence felt considerably more stress than subjects who made situational attributions. In fact, the latter subjects experienced no more stress than subjects who were successful in controlling the stimulation. Surprisingly, subjects whose attributions for performance led them to feel personally incompetent performed better than the remaining subjects both on problems administered in the same situation, and on problems administered in a new and different situation. The implications of the results for future helplessness studies and for the learned helplessness model were discussed.     

Second year treatment outcome of alcoholics treated by individualized behavior therapy: Results

Second year treatment outcome results are reported for 69 of 70 male alcoholics who, while hospitalized at Patton State Hospital, served as subjects in an experiment evaluating ‘Individualized Behavior Therapy (IBT)’ techniques. Subjects were initially assigned to either a controlled drinking or non-drinking (abstinence) treatment goal. and were then randomly assigned to either an experimental group receiving IBT or a control group receiving conventional state hospital treatment oriented towards abstinence. Previously reported results found that IBT subjects functioned significantly better than control subjects throughout the first year of follow-up. Second year follow-up results found that IBT subjects treated with a controlled drinking goal functioned significantly better than their respective control subjects on a variety of measures, including drinking behavior. Differences between IBT subjects treated with a non-drinking goal and their control subjects did not retain statistical significance during the second year of follow-up. Individual drinking profiles are presented for all subjects. Only subjects treated by IBT with a goal of controlled drinking engaged in a substantial amount of limited, non-problem drinking during the second year interval, and those subjects also had more abstinent days than subjects in any other group. The nature of adequate follow-up procedures and measures is discussed. Implications of these findings for alcoholism treatment are considered.     

Study habits and Eysenck's theory of extraversion-introversion

Predictions derived from Eysenck's theory of personality were tested in two samples by relating extraversion scores to library study locations, frequency of study breaks, and self-report of factors which influence study location. The predicted main effects for study location were found, with extraverts occupying locations that provided greater external stimulation. Positive correlations were consistently found between extraversion and preferred level of noise, preferred level of socializing opportunities, and rated importance of socializing opportunities. The prediction that extraverts would take more frequent study breaks was supported in Sample 1 but not replicated in Sample 2. The data are interpreted as providing direct support for Eysenck's theory of behavioral differences and mixed indirect support for his theory of neurological differences between introverts and extraverts.     

A disfluency descriptor digest for clinical use

A clinical form to be used in identifying which of a set of fluency eliciting techniques might be used most advantageously in therapy with individual stutterers is described.     

Constraints on Pavlovian conditioning of the pigeon: Relative conditioned reinforcing effects of red-light and tone CSs paired with food

Recent Pavlovian conditioning experiments presented all possible CS-US combinations of red-light and tone CSs and food and shock USs to separate groups of pigeons. Pigeons receiving shock USs demonstrated conditioned head raising followed by prancing to both CSs, but CRs were acquired more rapidly to tone than to red light. Although pigeons receiving food USs rapidly acquired a conditioned response of pecking to the red-light CS, there was no evidence of conditioned responding in groups receiving tone-food pairings. This outcome left open the possibility that Pavlovian pairings of tone and food may have resulted in association formation that was not revealed in performance. The present series of experiments attempted to reveal that association, using an indirect method of assessment, conditioned reinforcement. Experiment 1 demonstrated that both red light and tone paired with food became positive conditioned reinforcers, suggesting that an association between tone and food was formed in the same number of Pavlovian conditioning trials that previously failed to yield any direct evidence of conditioning. Experiment 2, which presented fewer conditioning trials, revealed that the tone-food association was formed less rapidly than the red light-food association. Experiment 3 demonstrated that the observed outcomes were not attributable to unconditioned, rather than conditioned, reinforcing effects of the Css.     

Extinction of the context and latent inhibition

The hypothesis that latent inhibition could be reduced by extinguishing the experimental context, that is, exposing the rats to the context between exposure to the conditional stimulus (CS) and conditioning, was tested. All experiments used the conditioned emotional response procedure. In Experiment 1, extinction was not effective when the animals were exposed to the clicker 40 times off the baseline of responding for food and when the clicker CS was partially reinforced with shocks during the test phase. In Experiments 2 and 3, latent inhibition could be reduced by extinction if the animals were exposed to the CS 24 or 16 times on-baseline, and if continuous reinforcement was used during the test. In Experiments 4, 5, and 6, we attempted to determine which variable was responsible for the discrepant results. In Experiment 4, extinction was effective with 20 or 40 on-baseline exposures to the CS, using continuous reinforcement during the test. In Experiment 5, extinction was not effective with exposure on- or off-baseline, using 24 exposures and partial reinforcement. Finally, in Experiment 6, extinction reduced latent inhibition using continuous, but not partial, reinforcement with 40 exposures off-baseline. From these results, we concluded that Wagner's model of habituation was not sufficient to account for latent inhibition and that a hybrid model, using both associative and cognitive representational processes, was necessary.     

On the study of statistical intuitions

The study of intuitions and errors in judgment under uncertainty is complicated by several factors: discrepancies between acceptance and application of normative rules; effects of content on the application of rules; Socratic hints that create intuitions while testing them; demand characteristics of within-subject experiments; subjects' interpretations of experimental messages according to standard conversational rules. The positive analysis of a judgmental error in terms of heuristics may be supplemented by a negative analysis, which seeks to explain why the correct rule is not intuitively compelling. A negative analysis of non-regressive prediction is outlined.