In an experiment, internal validity means:
A. that most extraneous variables have been identified and controlled.
B. showing that changes in your criterion variable relate only to changes in your predictor variable.
C. showing that changes in your independent variable caused observed changes in your dependent variable.
D. None of the answers is correct.
Answer: C
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Women who wish to use the drug Accutane are required to show proof, via pregnancy test, that they are not pregnant when they begin or continue the drug and should also
a. use two types of birth control. b. take extra vitamins. c. avoid all over-the-counter drugs. d. eat a diet high in protein.
Separation anxiety typically develops when infants are about ____ months old and peaks at around ____ months
a. 2–4; 10–12 b. 6–8; 14–18 c. 9–11; 13–15 d. 12; 24
Food preferences develop at an early age, and are strongly influenced by the ways parents feed infants and children
Indicate whether the statement is true or false
According to Avicenna, the active intellect was:
a. the mechanism by which humans enter into a relationship with God b. essentially as Aristotle had described it c. less important than common sense d. nonexistent