Abstract
The antecedents of perceived environmental uncertainty (PEU) were examined in two laboratory experiments to explore the relationship of PEU to environment and individual subjects' characteristic(s). Analysis showed differences between the more abstract "general" PEU items and more specific "task-related" PEU items. Measures of individual characteristics were not related to the task-related PEU Index, but were related to the more "general" measures of PEU. An experimental manipulation of "objective" environmental uncertainty showed task-related PEU to be strongly related to this objective uncertainty manipulation. Task-related PEU was also related secondarily, to individual characteristics. This same result was also found in a second experiment. The results of both experiments suggest that task-related operationalizations of PEU (as opposed to more general measures) minimize the impact of individual differences on the perceptual measure of PEU.
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