Every time a rat presses a lever, it receives a small injection of cocaine. That rat begins pressing the lever more and more, indicating that cocaine is a:

A) positive reinforcer.
B) negative reinforcer.
C) positive punisher.
D) negative punisher.


A) positive reinforcer.

Psychology

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When a sample mean is different from the mean of the sampling distribution (the population mean), two alternatives must be considered: The sample mean may represent _____, or it may represent _____

a. the central tendency of a population well; the variability of a population well b. a well population; a poor population c. the population poorly; the population well d. the population poorly; a different population

Psychology

Immediate emotional responses to a traumatic event are most directly under the control of the

a. somatic nervous system. b. central nervous system. c. autonomic nervous system. d. cerebral cortex.

Psychology

One result of Walter Mischel's critique of trait approaches has been:

A. a decrease in the practice of aggregation. B. a decreased interest in person-situation interactions. C. a decrease in the study of personality traits. D. an increased interest in person-situation interactions.

Psychology

Around the world, only people in the lowest socioeconomic groups have their babies at home

Indicate whether the statement is true or false.

Psychology