Effects of discrete-trials reinforcement frequency and changes in reinforcement frequency on preceding and subsequent fixed-ratio performance

Presented 2 experiments which investigated effects of reinforcement frequency on preceding and subsequent discrete-trials lever pressing in 24 naive, male hooded rats. 2 distinctively cued 8-response ratios were separated by a 10-sec midtrial interval. Reinforcement frequency of the 1st ratio was varied over 0, 50, 100%. The 2nd ratio was always reinforced. It was found that response rates in the 1st ratio were unaffected by reinforcement …