Social and Behavioral Sciences Commons^™

Effects Of Cocaine On Fixed-Ratio Responding Of Rats: Modulation By Required Response Force, Malath Makhay

Masters Theses

The effects of acute cocaine administrations (5. 6 to 32 mg/kg) were determined in rats responding under a multiple fixed-ratio 15 fixed-ratio 15 schedule of food delivery. The minimum response effort required in one schedule component was 25 g, whereas in the other component it was 200 g. Cocaine produced generally dose-dependent decreases in rate of responding and increases in pre-ratio pause times under each component. There was, however, a significant interaction between force and drug dose, and the magnitude of drug effects were larger in the component requiring 200 g for lever operation. Although a number of other parameters …

Effects Of Familiarity With A Sample-Stimulus In Selection-Based Learning Of Verbal Behavior, Robert J. Wallander

Masters Theses

Selection-based verbal behavior involves indicating a stimulus in some way from a set of stimuli. Twenty undergraduates served as subjects in this study of familiarity with a sample stimulus in a selection-based paradigm. The study utilized twenty Japanese Kanji characters as the comparison stimuli to be selected. Half the subjects were presented English names of animals as sample stimuli and the other half of the subjects were presented Japanese Katakana symbols (which appear as little more than nonsense figures) as sample stimuli.

T-tests were performed on the average number of twenty-trial blocks needed to meet criterion (two consecutive blocks without …