Abstract
Ss estimated probabilities of events and of the unions of those events in three different tasks. Probability estimates for the unions were approximately equal to the sum of the estimates for the component events, a relation demanded by probability theory.
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Supported by USPHS fellowships MF-12,744 and MF-12,012 and by the Air Force Systems Command, Electronic Systems Division, Decision Sciences Laboratory under contract AF 19(628)-2823.
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Beach, L.R., Peterson, C.R. Subjective probabilities for unions of events. Psychon Sci 5, 307–308 (1966). https://doi.org/10.3758/BF03328412
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DOI: https://doi.org/10.3758/BF03328412