Elaine grimaces throughout the day and often imitates the words and movements of others. She is most likely displaying the _____ type of schizophrenia.

Who are the most common participants in concordance research?

a. Adult males b. Non-human primates c. Twins d. People with brain damage e. Children

On a fixed-ratio schedule, reinforcement is given ________

a. for correct responses after randomly varying amounts of time have passed b. after a specific number of responses are given c. for the first correct response after a specific amount of time has passed d. after a randomly varying number of responses are given