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The effect of onset asynchrony on relative weights in profile analysis
Jinyu Qian1, Virginia M Richards
1Department of Psychology, University of Pennsylvania, 3401 Walnut Street, Suite 302C, Philadelphia, Pennsylvania 19104, USA. qjyspace@yahoo.com
Abstract:
Decision weights were estimated in a profile analysis task to determine whether onset asynchronies between the signal component and the nonsignal components encourage the segregation of the signal relative to the other components. The signal component onset was either synchronous or asynchronous with respect to the nonsignal components. In the asynchronous conditions, thresholds were higher and the decision weights were less efficient than in the synchronous conditions. These data are largely consistent with a segregation hypothesis: onset asynchrony encourages subjects to shift strategies from one of spectral shape discrimination toward one of intensity discrimination.
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