Implicit Knowledge in the Identification of Environmental Sounds: Causal Uncertainty and Stereotype

Two aspects of listeners' implicit knowledge about environmental sound were investigated: multiple casualty and stereotype. Several studies have demonstrated that the time required to identify an environmental is a function of the number of alternative causes, which defines causal uncertainty (...

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Bibliographic Details
Main Author: Ballas, James A
Format: Report
Language:English
Subjects:
Acoustics
ANCHORS
AUDITORY PERCEPTION
CASUALTIES
COGNITION
ENVIRONMENTS
IDENTIFICATION
PE61153N
PSYCHOACOUSTICS
RESPONSE
SORTING
SOUND
WUDN4424205
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Summary:Two aspects of listeners' implicit knowledge about environmental sound were investigated: multiple casualty and stereotype. Several studies have demonstrated that the time required to identify an environmental is a function of the number of alternative causes, which defines causal uncertainty (CU). The procedure used to estimate causal uncertainty requires the collection and sorting of identification responses from a group of listeners. The number of unique responses is then used to calculate CU. Because the cognitive process implied by the role of CU assumes that listeners are informed about alternative causes, it was hypothesized that they might be able to directly estimate the number of alternative causes. In the first experiment, listeners were asked to estimate the number of alternative causes for a sound. These estimates correlated significantly with previous estimates of CU and sound identification times obtained from different listeners. In a second experiment listeners were given anchors for the number of possible causes of the sounds based upon the estimates increased. These estimates correlated significantly with experiment. Keywords: Psychoacoustics; Auditory perception.