A substance found in milk that promotes sleep is ______
a. tryptophan c. endorphin
b. lipoprotein d. acetylcholine
A
Psychology
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Professor X wants to make sure his study of gifted youngsters will get published, but he's worried that his findings could have been caused by something other than the independent variable, which was a new teaching method he introduced
He is concerned with the ________________ of his experiment. a. probability level b. external validity c. replication d. internal validity
Psychology
In an experiment, the dependent variable is the behavior that is being a. manipulated. b. controlled
c. correlated. d. observed.
Psychology