By about ________ of age, infants are able to distinguish two objects from three
a. 1 month c. 18 months
b. 5 months d. 2 years
b
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In Horney's system, the central idea is ____
a. ?basic anxiety b. ?the need for freedom from fear c. ?the neurotic needs d. ?the idealized self-image e. ?the inferiority complex
The smallest unit of human heredity is a chromosome
Indicate whether this statement is true or false.
In operant conditioning, a punishment involves
A) a stimulus that greatly increases the occurrence of a response. B) removing a desirable stimulus. C) presenting a neutral stimulus. D) a gradual increase in the occurrence of a response.
Wendy wants to study how easily people make friends. She assigns people to talk with a stranger for either five minutes or ten minutes, and assigns people who are more outgoing to the "five-minute" condition, and shy people to the "ten-minute" condition
Which of the following is the threat to the internal validity in this study? a. The independent variable isn't held constant for every participant in a condition. b. Dependent variables are not being assigned randomly. c. She did not select from a random sample in her population. d. Wendy did not use random assignment.