| Abstract: | In 5 experiments, rats learned initial stimulus–outcome (S–O) associations in an instrumental training task. Exps 1 and 2 examined the effects on those S–O associations of subsequent or concurrent training of the stimulus with another outcome. Exps 3–5 examined the effects of subsequent nonreinforcement of the stimulus. In each case, the S–O association was assessed by its successful transfer to a different response that had earned the same outcome. In each experiment, additional training of the stimulus, either with another outcome or with nonreinforcement, had little effect on the original S–O association. (PsycINFO Database Record (c) 2010 APA, all rights reserved) |
