中華心理學刊 民 91，44 卷，1 期，13-23
Chinese Journal of Psychology 2002, Vol.44, No.1, 13-23
Hsing-Wu Chang (Department of Psychology, National Taiwan University)
An auditory recording of mechanical collision was presented synchronously with visual simulation of collision of objects on a microcomputer. Adult subjects were asked to rate causality on a 7-point scale after viewing the event on the computer. Ina typical launching paradigm, auditory information did not affect causal perception when temporal delay of launching was manipulated. However, when spatial gap was manipulated, auditory information enhanced causal perception at gap values that would normally destroy the impression of causality. The result was explained by the proposal that causal perception of phenomenal collision depends on the perception of four components: (1) an (first) object with nonzero momentum, (2) transmission of this momentum to another (second) object, (3) the second object undergoes force related change, and (4) the force must be perceived to originate from the momentum transfer. Spatial gap manipulation is related to the perception of component (2) while temporal gap manipulation relates to component (4). The differential effect of auditory information on causal perception is the result of the functional independence of component (2) and (4), as well as the fact that the sound of collision signals contact between objects and contact influences perception of component (2) but not component (4).
Keywords: Causal perception, Auditory effect, Mechanical collision