Thomas M. Ostrom

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The consequences of prejudice against accepting the null hypothesis were examined through (a) a mathematical model intended to stimulate the research-publication process and (b) case studies of apparent erroneous rejections of the null hypothesis in published psychological research. The input parameters for the model characterize investigators'(More)
In a recent meta-analysis, Johnson and Eagly (1989) questioned our conceptualization of and evidence for the effects of involvement on persuasion (Petty & Cacioppo, 1979, 1986). In particular, they concluded that (a) what we had termed issue involvement represented two distinct types of involvement (outcomeversus value-relevant), (b) each type of(More)
The role of computer simulation for theory construction in social psychology needs to be better understood. It should be viewed as a medium through which theoretical propositions can be articulated and predictions can be generated. It is one of several symbol systems available to theorists for expressing theoretical ideas. The first symbol system acquired(More)
Male and female subjects (n — 65) witnessed a staged theft in which either an expensive object (high seriousness) or an inexpensive object (low seriousness) was stolen, and subjects either had prior knowledge of the object's value or learned of its value only after the theft. When witnesses had prior knowledge of the object's value, accurate identification(More)
It has long been tacitly assumed that perceivers spontaneously organize social information, such as traits and behaviors, into individualized person gestalts. The validity of this assumption was questioned in research by Ostrom and Pryorthat examined how perceivers organize information in multiperson, multiattribute perceptual fields (e.g., a party, a group(More)
The role of visual stimuli in the organization and recall of social information was investigated in a study that presented photographs of stimulus persons along with verbal trait descriptors. Paired with four trait descriptors of each stimulus person, subjects saw either no picture, one trait-unrelated picture, four trait-unrelated pictures, or four(More)
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