The time course of perceptual choice: The leaky, competing accumulator model

被引:1506
作者
Usher, M
McClelland, JL
机构
[1] Univ London Birkbeck Coll, Dept Psychol, London WC1E 7HX, England
[2] Ctr Neural Basis Cognit, Mellon Inst 115, Pittsburgh, PA 15213 USA
[3] Carnegie Mellon Univ, Dept Psychol, Pittsburgh, PA 15213 USA
关键词
D O I
10.1037//0033-295X.108.3.550
中图分类号
B84 [心理学];
学科分类号
04 ; 0402 ;
摘要
The time course of perceptual choice is discussed in a model of gradual, leaky, stochastic. and competitive information accumulation in nonlinear decision units. Special cases of the model match a classical diffusion process, but leakage and competition work together to address several challenges to existing diffusion, random walk, and accumulator models. The model accounts for data from choice tasks using both time-controlled (e.g., response signal) and standard reaction time paradigms and its adequacy compares favorably with other approaches. A new paradigm that controls the time of arrival of information supporting different choice alternatives provides further support. The model captures choice behavior regardless of the number of alternatives, accounting for the log-linear relation between reaction time and number of alternatives (Hick's law) and explains a complex pattern of visual and contextual priming in visual word identification.
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页码:550 / 592
页数:43
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