Stuart Oskamp

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This study investigated whether psychologists' confidence in their clinical decisions is really justified. It was hypothesized that as psychologists study information about a case (a) their confidence about the case increases markedly and steadily but (b) the accuracy of their conclusions about the case quickly reaches a ceiling. 32 judges, including 8(More)
The incidence of a variety of safer-sex behaviors was predicted, using five measures from the Health Belief Model (Janz & Becker, 1984): perceived susceptibility, perceived severity, self-efficacy, social support, and perceived barriers. The participants, 424 U.S. undergraduates at six schools, completed a written questionnaire. The results of multiple(More)
The sustainability of human life on Earth in the future is in danger. Human actions are producing many harmful and possibly irreversible changes to the environmental conditions that support life on Earth. This article summarizes major threats to Earth's environment, including global warming, ozone layer destruction, exhaustion of fisheries and agricultural(More)
Persuasive communication and public commitment were used to encourage recycling in a citywide program. The persuasive communication was a combination of factors which have been found by laboratory researchers to produce attitude and/ or behavior change. The public commitment manipulation involved signing a statement supportive of recycling. Households which(More)
chology. My goal in this introductory chapter is to provide some historical and disciplinary context for this new field. I had originally considered as a subtitle “Not Your Dad’s (or Mom’s) Research Approach.” However, as I delved into the literature, I soon realized that this field began much more recently than a generation ago—indeed, mostly in the last(More)
Following the view that individual future time perspective is an outcome of the socialization process, it was hypothesized that good contraceptors would display significantly longer future time extension than poor contraceptors. In a Planned Parenthood agency, 25 subjects from each group, constituting nearly the whole clinic population in these categories(More)