Epistemic justification and psychological realism

The main thesis of this paper is that it is not possible to determine the nature of epistemic justification apart from scientific psychological investigation. I call this view the strong thesis of methodological psychologism. Two sub-theses provide the primary support for this claim. The first sub-thesis is that no account of epistemic justification is correct which requires for the possession of at least one justified belief a psychological capacity which humans do not have. That is, the correct account of epistemic justification must be psychologically realistic. The second sub-thesis is that it is not possible to determine whether an account of epistemic justification is psychologically realistic apart from scientific psychological investigation. After defending these subtheses, I point out some interesting consequences of the overall thesis which present a challenge to traditional epistemology.     

Barbiturates and Human Physical Aggression

The effects of barbiturates on aggressive behavior were investigated in two studies. In both studies, subjects were given the opportunity to administer electric shocks to an opponent within the context of a competitive reaction time task. In Study 1, 30 subjects received increasing provocation from an opponent following their ingestion of one of three doses of secobarbital. Aggressive behavior was not found to increase as a function of drug dosage. In Study 2, 30 subjects ingested a placebo or one of two doses of pentobarbital. Once again, the barbiturate did not influence aggressive responding. The findings suggest that barbiturates, in moderate, clinically appropriate doses do not facilitate aggressive responding.     

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.     

Storytelling and Coping With Stressful Events1

Three studies explored the coping benefits and limitations of stories people hear about others undergoing similar stressful events. In Study One, cancer patients reported that positive stories about other patients were preferable to and more helpful than negative stories, yet negative stories were more commonly told. Study Two manipulated the valence and source of stories told to college students facing midterm exams. Stories with positive endings and those relayed by expert sources were regarded more positively than negative stories and those told by nonexperts. Study Three manipulated the valence and informativeness of stories in a similar college sample. Positive and informative stories were rated more favorably, although these effects were independent of each other. Implications for social comparison and social support are discussed.     

Role of cognitive appraisal in panic-related avoidance

The present study examined several dimensions of panic cognitions to test whether panic appraisals predict phobicity among panic sufferers. Thirty-five patients meeting DSM-III-R criteria for panic disorder with minimal or no phobic avoidance were compared to 40 patients meeting DSM-III-R criteria for panic disorder with agoraphobia (severe). The two groups looked strikingly similar on measures of panic symptoms, panic frequency and panic severity. As expected, patients diagnosed as having panic disorder with agoraphobia reported significantly more depression and phobic avoidance than patients with PD. Striking differences emerged on each of the following panic appraisal dimensions: (a) anticipated panic, (b) perceived consequences of panic, and (c) perceived self-efficacy in coping with panic. In each case, patients with panic disorder and agoraphobia reported significantly more dysfunctional panic appraisals than patients with panic disorder and no avoidance. Of those panic appraisal dimensions studied, anticipated panic emerged as the most potent correlate of agoraphobic avoidance. These findings support the hypothesis that cognitive appraisal factors may play an important role in the genesis or maintenance of phobic avoidance among panic patients.     

Influence of regular aerobic exercise on psychological health: a randomized, controlled trial of healthy middle-aged adults

Although a variety of psychological benefits have been attributed to regular exercise, few experimentally controlled studies of healthy individuals currently exist. One hundred twenty healthy, sedentary, middle-aged men and women were randomly assigned to either a 6-month home-based aerobic exercise training program or to an assessment-only control condition. Adherence across the 6-month period was found by both self-report and heart rate microprocessor methods to exceed 75% in both sexes. To assess changes in a variety of psychological variables over time, a 14-item Likert rating scale was completed and returned on a biweekly basis throughout the 6-month period. Slope analyses conducted on the 11 items attaining acceptable test-retest reliability coefficients showed significant between-groups differences on the 3 items most closely associated with the actual physical changes that occurred with exercise (all ps less than .004). Implications in relation to repeated measurement of psychological changes in nonclinical populations and the determination of the relevant population-, activity-, and program-specific parameters involved are discussed.     

Evaluating a treatment without extinction for elopement maintained by access to stereotypy

Elopement is a common and potentially dangerous form of problem behavior. Results of a functional analysis found that the elopement of a child with autism was maintained by access to stereotypy in the form of door play. We implemented functional communication training and contingency-based delays dependent on the absence of elopement and increased the amount of time the participant waited prior to engaging in stereotypy. We also conducted treatment-extension probes, with the participant waiting up to 10 min without elopement.