کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7275888 1473508 2017 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Duration of wheel-running reinforcement: Effects on reinforcement value and motivation in free-feeding and food-deprived rats
ترجمه فارسی عنوان
مدت زمان استفاده از تقویت چرخ: تأثیر بر ارزش تقویت و انگیزه در موش های آزاد و تغذیه محروم
کلمات کلیدی
مدت زمان پشتیبانی تقویت چرخ محرومیت از مواد غذایی، انگیزه ذاتی، انگیزه مربوط به غذا، تقویت خودکار، فشار سوزن، موش
موضوعات مرتبط
علوم زیستی و بیوفناوری علم عصب شناسی علوم اعصاب رفتاری
چکیده انگلیسی
Ten (pair housed) female Long-Evans rats were exposed to 5 s, 30 s, and 90 s wheel-running reinforcement durations on a response-initiated variable interval 20 s schedule as food deprivation was manipulated. On free feeding, never-deprived rats showed low wheel running and lever-pressing rates with long postreinforcement pauses (PRPs) for the 5-s reinforcement duration. Subsequently, when food deprived (Deprived 1), rats showed no effect of reinforcement duration on all measures. Under a second deprived condition (Deprived 2) with the rats maintained in single cages, there was no effect of housing (single vs. paired). When data from both deprivation assessments (Deprived 1 and Deprived 2) were combined, rats showed lower wheel running and overall lever-pressing rates with longer pauses on the 90-s duration compared to 30 s and 5 s bouts of wheel activity. The pattern of results challenges a reinforcement value interpretation, but is consistent with shifts in the motivational basis of wheel running. On free feeding, never-deprived rats were intrinsically motivated to run on wheels and operant lever-pressing was maintained at moderate rates by the automatic reinforcement of wheel running, except at the short reinforcement duration (5 s). When food deprived, motivation became food-related and rats showed high rates of lever pressing even at the shortest duration. The weak effects under initial deprivation (Deprived 1) raise questions about equivalence between wheel-running reinforcement duration and reinforcement magnitude using food reinforcement.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Learning and Motivation - Volume 60, November 2017, Pages 1-9
نویسندگان
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