Sheer, Daniel E.Bloom, J. M.2020-12-162020-12-16196912645571https://hdl.handle.net/10657/7157This study examined the effect of regular patterns of reward and ITI on acquisition. 4 groups of 20 rat Ss were given 13 trials a day for 6 days. There were 2 schedules of reward (CRF and VRF), 2 lengths of ITI (15 and 60 sec.), and 2 values of reward (1 and 8 45 mg pellets). The rewards In the VRF groups and the ITI for all groups were presented In single alternation. A significant (alpha = .05) response decrement occurred on trials following a large reward and a short ITI. This decrement was present on the first and last days of training and did not appear to change over days and was independent of schedule of reward. It was concluded that the decrement was unconditioned and not the product of differential conditioning and therefore Is a serious source of confoundment in pattern learning experiments.application/pdfenThis item is protected by copyright but is made available here under a claim of fair use (17 U.S.C. §107) for non-profit research and educational purposes. Users of this work assume the responsibility for determining copyright status prior to reusing, publishing, or reproducing this item for purposes other than what is allowed by fair use or other copyright exemptions. Any reuse of this item in excess of fair use or other copyright exemptions requires express permission of the copyright holder.Reward (Psychology)Rats--BehaviorThesisreformatted digital