Duration-specific effects of outcome devaluation in temporal control are differentially sensitive to amount of training

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Araiba, Sho | El Massioui, Nicole | Brown, Bruce L. | Doyère, Valérie

Edité par CCSD ; CSH Press -

International audience. This study demonstrates that overtraining in temporal discrimination modifies temporal stimulus control in a bisection task and produces habitual responding, as evidenced through insensitivity to food devaluation. Rats were trained or overtrained in a 2- versus 8-sec temporal discrimination task, with each duration associated with a lever (left or right) and food (grain or sucrose). Overtraining produced a leftward shift in the bisection point. Devaluation treatment induced a differential loss of responding depending on stimulus duration (short versus long) and the level of training (training versus overtraining). The relationships between timing behavior and habitual behavior are discussed.

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