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scalar expectancy
The Scalar timing or scalar expectancy theory (SET) is a model that posits an internal clock, and particular memory and decision processes.〔Gibbon, J. (1977). Scalar expectancy theory and Weber’s law in animal timing. ''Psychological Review''. 84(3), 279-325〕 SET is the predominate model of animal timing behavior.
==History==
John Gibbon originally proposed the scalar expectancy model, an extension of Weber's Law, as a quantitative model used to explain the temporally controlled behavior on non-human subjects.〔 SET in its early version was primarily used to explain the break-run pattern, a common response pattern on fixed-interval reinforcement schedules. In a break-run pattern, an animal does not start responding to the stimulus upon representation. However, as the target duration approaches, the subject switches to a high rate of responding; this switch occurs at approximately two-thirds of the target duration.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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