کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
919002 919869 2011 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Motivational control of impulsive behavior interacts with choice opportunities
موضوعات مرتبط
علوم زیستی و بیوفناوری علم عصب شناسی علوم اعصاب رفتاری
پیش نمایش صفحه اول مقاله
Motivational control of impulsive behavior interacts with choice opportunities
چکیده انگلیسی

Impulsive behavior has been investigated through choice between a smaller/immediate reinforcer and a larger/delayed reinforcer, or through performance on a differential reinforcement of low rate (DRL) schedule. In the present study, we investigated a methodological divergence between these two procedures: in the former procedure, delay is a consequence of the subject's own choice, whereas in the later procedure, subjects are explicitly reinforced for delaying a response. In Experiment 1, 7 rats maintained at 80% of their free-feeding weights showed poorer efficiency of lever-pressing responses on a DRL 30-s schedule than when they were maintained at 90% of free-feeding weight. In Experiment 2, 16 rats were subjected to a concurrent chain schedule: the initial link was concurrent fixed ratio 1 fixed ratio 1, and each of these alternatives was followed by a short-DRL requirement with a one pellet reinforcer or a long-DRL requirement with a three pellet reinforcer. In one block of trials, rats were not allowed to choose between the two terminal links (forced-choice), whereas in the other block of trials rats were allowed to choose freely between the two terminal links (free-choice). Compared with rats maintained at 95% of their free-feeding weights, rats maintained at 80% of their free-feeding weights showed poorer efficiency in the terminal links’ DRL schedule performance (just as in Experiment 1), but this difference was shown only in the forced-choice blocks. These results indicate that motivational control of DRL schedule performance interacts with type of choice-making opportunity and highlight the direct comparison of motivational control of impulsive choice and DRL schedule performance.


► We examined the effects of choice opportunity on differential reinforcement of low rate (DRL) schedule performance.
► Highly deprived subjects showed poorer efficiency in DRL schedule performance.
► This motivational effect disappeared when the DRL schedule performance is a consequence of the subject's own choices.
► These results highlight the direct comparison of motivational control of impulsive choice and DRL schedule performance.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Learning and Motivation - Volume 42, Issue 2, May 2011, Pages 145–153
نویسندگان
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