Variation of bar-press duration: where do new responses come from?

@article{Roberts2006VariationOB,
  title={Variation of bar-press duration: where do new responses come from?},
  author={Seth Roberts and Afshin M. Gharib},
  journal={Behavioural processes},
  year={2006},
  volume={72 3},
  pages={215-23}
}
Instrumental learning involves both variation and selection: variation of what the animal does, and selection by reward from among the variation. Four experiments with rats suggested a rule about how variation is controlled by recent events. Experiment 1 used the peak procedure. Measurements of bar-press durations showed a sharp increase in mean duration… CONTINUE READING