Date of Award


Degree Type


Degree Name

Master of Science


Psychological Science


Psychological Science (MS)

First Advisor/Chairperson

Adam Prus


This study attempted to further explore the discriminative stimulus properties of antipsychotic drugs, by establishing the typical antipsychotic drug chlorpromazine, and the atypical antipsychotic drug clozapine as discriminative stimulus in two different groups of rats. The rats trained to discriminate chlorpromazine from vehicle failed to do so reliably, however nine of ten rats trained to discriminate 1.25 mg/kg clozapine from vehicle were able to acquire the discrimination in 19.1 sessions. The clozapine cue partially generalized (63.13% drug lever responding [SEM = ± 18.91]) to the antimalarial drug methylene blue at the 7.5 mg/kg dose, but not to the antimalarial quinacrine. This study found that the antimalarial drug methylene blue may share some pharmacological similarities or subjective effects with that of clozapine, and further studies into its antipsychotic value, if any, should be explored.

Access Type

Open Access