“…Although several plausible causes were suggested, the subjects tended to seek evidence that clarified the role of an implicated focal cause. Other experiments show that estimations ofthe effect of a focal cause on an outcome are typically attenuated or discounted when alternative causes are considered (see, e.g., Kruglanski, Schwartz, Maides, & Hamel, 1978). For example, Van der Plight, Eiser, and Spears (1987) found that the perceived contribution of any particular technology (e.g., nuclear power) to the overall supply of energy in the United Kingdom was attenuated when a multiplicity oftechnologies, as opposed to a single technology, were rated.…”