In order to assess possible confounding of discriminative stimulus effects with those produced by the reinforcing stimulus, three groups of four rats each were trained for 45 hr on a variable-interval 1-min reinforcement program. Two groups were run on a multiple variable-interval extinction schedule in which the reinforcement stimulus (SD) and the nonreinforcement stimulus (SΔ) were two intensities of a 4-kHz (cps) tone separated by 40 or 10 db. The third group was run on a mixed schedule with a single intensity constantly present. The mixed-schedule animals showed no discrimination of the reinforcement program. Under the multiple schedule, the highest SΔ rates were obtained after SD intervals, regardless of the reinforcement availability in the SD interval. These local rate variations in SΔ were small in proportion to those produced by the SD versus SΔ intensities.
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机译:为了评估歧视性刺激效果与强化刺激产生的混淆,三组(每组四只大鼠)在可变间隔的1分钟强化程序中训练了45小时。两组按多重间隔灭绝计划运行,其中强化刺激(S D sup>)和非强化刺激(S Δ sup>)的强度分别为4- kHz(cps)音调分隔40或10 db。第三组按混合时间表运行,并且不断出现单一强度。混合时间表的动物没有表现出对增强程序的歧视。在多重计划下,无论S D sup>间隔内的钢筋可用性如何,在S D sup>间隔后都可获得最高的S Δ sup>率。 S Δ sup>的这些局部速率变化与S D sup>相对于S Δ sup>强度产生的变化成比例。
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