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Within-Session Changes In The Vi Response Function: Separating Food Density From Elapsed Session Time, James Dougan, Laura Campbell
Within-Session Changes In The Vi Response Function: Separating Food Density From Elapsed Session Time, James Dougan, Laura Campbell
James Dougan
Previous studies examining the relationship between response rate and reinforcement rate on variable- interval schedules (the variable-interval response function) have confounded elapsed session time with within-session changes in food density. The present experiments attempted to manipulate these factors independently and thus isolate their effects on responding. In Experiment 1, 7 rats pressed a bar for food on a series of four variable-interval schedules (7.5 s, 15 s, 30 s, and 480 s). Elapsed session time was held constant while food density was manipulated via a presession feeding. Changes in food density altered the form of the variable-interval response function, independently …