Occasion setting.

Occasion setting of timing behavior.

Rats were trained on a temporal switching discrimination, with 2 features, A and B, signaling 2 target conditioned stimuli, x and y; feature offset and target onset were separated by a 5-s feature-target interval, and all target stimulus presentations terminated in a food pellet. The target conditioned stimuli were either short or long (6 or 30 s): Specifically, when signaled by A, x was 6 s an...

Occasion setting and drug tolerance.

There is considerable evidence that drug-paired cues become associated with drug effects. It has been hypothesized that these cues act as Pavlovian conditional stimuli (CSs), and elicit conditional compensatory responses that contribute to tolerance. On the basis of a conditioning analysis of tolerance, we would expect that it should be possible to establish drug-paired cues as occasion setters...

Occasion Setting without Feature-Positive Discrimination Training

In four experiments rats received training in which a brief conditioned stimulus, x, occurred during presentations of an extended feature stimulus, A; a second brief stimulus, y, occurred during presentations of a second feature, B. In Experiment 1 both x and y were paired with food and, in a subsequent test, they elicited more conditioned responding when they were presented in the feature with...

Blocking of occasion setting in feature-positive discriminations

Occasion setting during a spatial-search task with pigeons.

A spatial task was used to investigate if a stimulus could set the occasion for responding to a landmark. Pigeons were trained with a positive occasion setter (OS; a colored background display) signaling the contingency between a landmark (LM; visual patterned stimulus) and the location of a rewarded response. The two most common tests of an OS (transfer tests and post-training extinction of th...