کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
919023 | 919872 | 2011 | 9 صفحه PDF | دانلود رایگان |

In three experiments, rats received exposure to a sucrose solution followed by conditioning with a neutral flavor as the conditioned stimulus (CS) and sucrose as the unconditioned stimulus (US). In Experiments 1 and 2, some rats were given both the preexposure and the conditioning phases in a highly familiar context (the homecage), whereas other animals received both phases in a novel and distinctive context. In both cases the magnitude of the conditioning effect was reduced by preexposure to the US. Experiment 3 directly assessed the possible role of contextual cues by changing the context between the exposure phase and the conditioning phase but found no loss of the US-preexposure effect in these conditions. These results lend no support to the blocking-by-context account of the US-preexposure effect; alternative interpretations are considered.
► The neophobic response to sucrose declines with exposure.
► Preexposure to sucrose also reduces its ability to support conditioning.
► The latter effect is found both when the training context is familiar and when it is novel.
► The effect is not influenced by a change of context between preexposure and conditioning.
Journal: Learning and Motivation - Volume 42, Issue 4, November 2011, Pages 273–281