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Grant, 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
Leon, Samuel P.; Abad, Maria J. F.; Rosas, Juan M. – Learning and Motivation, 2011
Four experiments explored the role of contexts in information retrieval after different levels of acquisition training in human predictive learning. Participants were trained where cue (X) was followed by an outcome in context A while a different cue (Y) was followed by the absence of the outcome in context B. When 4 training trials with each cue…
Descriptors: Stimuli, Organizations (Groups), Information Retrieval, Experiments
Meulders, Ann; Vervliet, Bram; Vansteenwegen, Debora; Hermans, Dirk; Baeyens, Frank – Learning and Motivation, 2011
Unpredictability of an unconditioned stimulus (US) typically produces context conditioning in animals and humans. We modified the Martians task--a computer game measuring learning of Pavlovian associations through conditioned suppression--for assessing context conditioning in humans. One between-subjects and one within-subjects study are reported.…
Descriptors: Animals, Stimuli, Classical Conditioning, Games
Pinto, Carlos; Machado, Armando – Learning and Motivation, 2011
To better understand short-term memory for temporal intervals, we re-examined the choose-short effect. In Experiment 1, to contrast the predictions of two models of this effect, the subjective shortening and the coding models, pigeons were exposed to a delayed matching-to-sample task with three sample durations (2, 6 and 18 s) and retention…
Descriptors: Intervals, Infants, Tests, Short Term Memory
Young, Michael E.; Nguyen, Nam – Learning and Motivation, 2009
A first-person shooter video game was adapted for the study of causal decision making within dynamic environments. The video game included groups of three potential targets. Participants chose which of the three targets in each group was producing distal explosions. The actual source of the explosion effect varied in the delay between the firing…
Descriptors: Video Games, Influences, Decision Making, Experiments
Goddard Murray J. – Learning and Motivation, 2007
Two experiments with rats examined the effects of context extinction on responding to the signal value of an unconditioned stimulus (US). In Experiment 1, US signal value was first trained when a single food pellet signaled the delivery of three additional pellets. After training, rats received either context extinction (CE) or home cage (HC)…
Descriptors: Experimental Psychology, Experiments, Context Effect, Stimuli
Reed, Phil; Antonova, Marina – Learning and Motivation, 2007
The experiment was carried out to determine whether exposure to an uncontrollable relationship between an action and its outcome during a non-aversive pretreatment phase would affect subsequent ratings of perceived control emitted by human participants. Its other aim was to investigate the effect of such pre-exposure on the attentional focus of…
Descriptors: Cues, Reaction Time, Attention, Feedback
Thomas, Brian L.; Longo, Craig L.; Ayres, John J. B. – Learning and Motivation, 2005
In three experiments using the barpress conditioned suppression task with albino rats, we studied the renewal (relapse) of conditioned fear in an ABA fear-renewal paradigm. We found that explicitly unpaired (EU) deliveries of conditioned stimuli (CSs) and unconditioned stimuli (USs) in Context B thwarted fear renewal in Context A. Evidence…
Descriptors: Stimuli, Fear, Science Experiments, Psychological Studies