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Fixed-interval pause duration in chained fixed-ratio, fixed-interval schedules
Todorov, João Claudio; Carvalho, Lucas Couto de; Couto, Kalliu Carvalho; Cruz, Gleidson Gabriel da; Cunha, Claudia Octavia Ribeiro da.
Affiliation
  • Todorov, João Claudio; Universidade de Brasília. Brasília. BR
  • Carvalho, Lucas Couto de; Instituto de Educação Superior de Brasília. Brasília. BR
  • Couto, Kalliu Carvalho; Instituto de Educação Superior de Brasília. Brasília. BR
  • Cruz, Gleidson Gabriel da; Instituto Walden 4. Brasília. BR
  • Cunha, Claudia Octavia Ribeiro da; Instituto de Educação Superior de Brasília. Brasília. BR
Psychol. neurosci. (Impr.) ; 5(1): 91-96, Jan.-June 2012. graf, tab
Article in En | LILACS | ID: lil-654434
Responsible library: BR85.1
ABSTRACT
Ten rats were submitted to chained fixed-ratio (FR), fixed-interval (FI) schedules of reinforcement. A FR schedule at one lever produced a discriminative stimulus associated with a FI 60-s schedule of primary reinforcement (water) at the second response lever. In Experiment 1, the FI schedule was kept constant while the FR requirement was changed from one to seven responses under five different experimental conditions for five rats. Increases in the FR requirement resulted in increases in post-reinforcement pauses but also decreases in pauses in the FI schedule. Using another five rats, Experiment 2 tested the hypothesis that short pauses in the FI schedule result from the use of the chained schedules procedure. Baseline was a FI 80-s schedule. In the second condition, chained FR 1 FI 80-s schedules were programmed. The third condition was a return to baseline. In baselines 1 and 2, the FI pause was compatible with the literature but decreased considerably when a chained schedule was used. The present results support the hypothesis that the time between primary reinforcement presentations dominates the control of FI pauses over control by the onset of a discriminative stimulus.
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Full text: 1 Index: LILACS Main subject: Reinforcement Schedule / Discrimination, Psychological Limits: Animals Language: En Journal: Psychol. neurosci. (Impr.) Journal subject: NEUROLOGIA / PSICOLOGIA Year: 2012 Type: Article

Full text: 1 Index: LILACS Main subject: Reinforcement Schedule / Discrimination, Psychological Limits: Animals Language: En Journal: Psychol. neurosci. (Impr.) Journal subject: NEUROLOGIA / PSICOLOGIA Year: 2012 Type: Article