Abstract
Multiple shifts in reward amount were given to rats in a straight runway. Both positive and negative contrast effects were observed. A positive contrast effect was observed, however, only if the shift from small to large reward occurred while the subject was evidencing a negative contrast effect. Implications for current conceptions of reinforcement contrast are discussed.
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Maxwell, F.R., Calef, R.S., Murray, D.W. et al. Positive and negative successive contrast effects following multiple shifts in reward magnitude under high drive and immediate reinforcement. Animal Learning & Behavior 4, 480–484 (1976). https://doi.org/10.3758/BF03214443
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DOI: https://doi.org/10.3758/BF03214443