A researcher introduces a new mathematics program in one school district and uses a neighboring district as a no-treatment control group. After the program is in place for six months, the researcher intends to give the students in both districts a standardized mathematics test and then compare their scores. This research cannot be classified as a true experiment because ____.
a. the treatment
is administered to only one group.
b. there is no pretest to determine mathematics ability before the program
c. the researcher does not control the assignment of participants to groups
d. it is not conducted in a laboratory
c
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Which theory places the greatest emphasis on the relationship between consequences and the probability of a behavior reoccurring in the future?
a. Operant conditioning b. Information-processing c. Classical conditioning d. Piagetian
"Out of control" children typically are reared in
a. homes that are managed by attentive, authoritative parents. b. non-coercive home environments. c. single-parent families headed by fathers. d. coercive home environments.
Twin studies indicate that heredity makes a substantial contribution to
a. schizophrenia. b. gender identity. c. obsessive-compulsive disorder. d. mate selection. e. hobbies.
According to the Yerkes-Dodson law, successful performance on a difficult and complex task requires _____
a) no arousal. b) lower arousal. c) moderate arousal. d) higher arousal.