Discrimination between outcomes in instrumental learning: effects of preexposure to the reinforcers.

C A J Blair, Pam Blundell, Tiffany Galtress, Geoffrey Hall, Simon Killcross
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引用次数: 7

Abstract

In two experiments rats received instrumental training with two response levers, one response being reinforced by sucrose solution and the other by sucrose pellets. Prior to a test session, on which both levers were made available in the absence of reinforcement, the rats were given free access to one of the reinforcers, a procedure known to reduce its value. It was found that the rats responded at a lower rate on the lever that had produced the now-devalued reinforcer, but that this effect was substantial only in rats that had received preexposure to the two reinforcers before instrumental training was begun (Experiment 1). Experiment 2 demonstrated that this effect was obtained only when presentations of the two reinforcers were presented according to an inter-mixed schedule during preexposure. It is suggested that this result constitutes an instance of the perceptual learning effect in which intermixed preexposure to similar events enhances their discriminability.

工具学习结果的差异:强化物预暴露的影响。
在两个实验中,大鼠接受了两种反应杠杆的工具训练,一种反应由蔗糖溶液增强,另一种反应由蔗糖颗粒增强。在没有强化物的情况下,两种杠杆都可以使用,在测试之前,老鼠可以自由接触其中一种强化物,这一过程会降低其价值。研究发现,大鼠在产生贬值强化物的杠杆上的反应率较低,但这种效应只有在工具训练开始前预先暴露于两种强化物的大鼠中才显著(实验1)。实验2表明,只有在预先暴露期间按照混合时间表呈现两种强化物时,才会产生这种效应。这表明,这一结果构成了感知学习效应的一个实例,其中混合预暴露于类似事件增强了它们的可辨别性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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