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Direct linkGrant, Douglas S. – Learning and Motivation, 2011
Experiments 1 and 2 involved independent groups that received primary reinforcement after a correct match with a probability of 1.0, 0.50 or 0.25. Correct matches that did not produce primary reinforcement produced a conditioned reinforcer. Both experiments revealed little evidence that acquisition or retention was adversely affected by use of…
Descriptors: Reinforcement, Probability, Laboratory Experiments, Conditioning
Alessandri, Jerome; Stolarz-Fantino, Stephanie; Fantino, Edmund – Learning and Motivation, 2011
A concurrent-chains procedure was used to examine choice between segmented (two-component chained schedules) and unsegmented schedules (simple schedules) in terminal links with equal inter-reinforcement intervals. Previous studies using this kind of experimental procedure showed preference for unsegmented schedules for both pigeons and humans. In…
Descriptors: Science Activities, Intervals, Research Methodology, Reinforcement
Diaz, Estrella; De la Casa, L. G. – Learning and Motivation, 2011
This paper presents evidence of extinction, spontaneous recovery and renewal in a conditioned preferences paradigm based on taste-taste associations. More specifically, in three experiments rats exposed to a simultaneous compound of citric acid-saccharin solution showed a preference for the citric solution when the preference was measured with a…
Descriptors: Stimuli, Models, Animals, Laboratory Experiments
Winterbauer, Neil E.; Bouton, Mark E. – Learning and Motivation, 2011
Three experiments with rat subjects examined resurgence of an extinguished instrumental response using the procedure introduced by Epstein (1983) with pigeons. There were three phases: (1) initial acquisition of pressing on a lever (L1) for pellet reward, (2) extinction of L1, and (3) a test session in which a second lever (L2) was inserted,…
Descriptors: Rewards, Experimental Psychology, Animals, Laboratory Experiments
Gonzalez, Felisa; Garcia-Burgos, David; de Brugada, Isabel; Gil, Marta – Learning and Motivation, 2010
In two experiments, thirsty rats consumed a compound of sucrose and a non-preferred flavor. In Experiment 1, a conditioned preference was observed in the experimental group when animals were tested both thirsty and hungry, but not when they were tested just thirsty. Animals in the control group, which experienced the flavor and the sucrose…
Descriptors: Experimental Groups, Control Groups, Animals, Evaluation Methods
Cohen, Jerome; Han, Xue; Matei, Anca; Parameswaran, Varakini; Zuniga, Robert; Hlynka, Myron – Learning and Motivation, 2010
When rats had to find new (jackpot) objects for rewards from among previously sampled baited objects, increasing the number of objects in the sample (study) segment of a trial from 3 to 5 and then to 7 (Experiment 1) or from 3 to 6 and 9 (Experiments 2 and 3) or from 6 to 9 and 12 (Experiment 4) did not reduce rats' test segment performance.…
Descriptors: Laboratory Experiments, Short Term Memory, Rewards, Probability
