da Silva Stephanie P, Lattal Kennon A
West Virginia University, Anderson College, 316 Blvd., Anderson, SC 29621, USA.
Behav Processes. 2006 Feb 28;71(2-3):157-63. doi: 10.1016/j.beproc.2005.11.005. Epub 2005 Dec 20.
The question of how temporal control of responding might be influenced by contingency changes in other contexts was investigated. Each of three pigeons first was exposed to a two-component multiple schedule in which a two-key free-operant psychophysical procedure operated in one component and a variable-interval schedule operated in the other component. The variable-interval schedule then was changed to extinction while the free-operant psychophysical procedure remained unchanged. Finally, the variable-interval schedule was reintroduced. Response rates on the left key and the estimated temporal threshold under the free-operant psychophysical procedure increased for each pigeon when the alternate component schedule was changed to extinction and then decreased again when the variable-interval schedule was reintroduced. The results suggest one way that temporal control is affected by its context, and may be interpreted through the direct effects of overall reinforcement rate on temporal control mechanisms or the disruptive effects of alternative sources of reinforcement on temporally controlled behavior.
研究了在其他情境中，反应的时间控制如何受到偶然性变化的影响。三只鸽子中的每一只首先都被置于一个双成分多重时间表中，其中一个成分采用双键自由操作心理物理学程序，另一个成分采用可变间隔时间表。然后，可变间隔时间表改为消退，而自由操作心理物理学程序保持不变。最后，重新引入可变间隔时间表。当交替成分时间表改为消退时，每只鸽子在左键上的反应率和自由操作心理物理学程序下的估计时间阈值都会增加，而当重新引入可变间隔时间表时，又会再次下降。结果表明了时间控制受其情境影响的一种方式，并且可以通过总体强化率对时间控制机制的直接影响或替代强化源对时间控制行为的干扰效应来解释。
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