In an experiment with two independent variables, the occurrence of an interaction means that
a. the experiment was poorly designed.
b. there was a ceiling effect.
c. the effect of one independent variable was different at different levels of the other independent variable
d. the effect of one independent variable was the same at all levels of the other independent variable.
C
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Belinda was very close to her father because he always made her feel safe. Belinda's father always wore Stetson cologne. Today, every time she smells the scent of Stetson cologne, she develops a pleasant feeling of warmth and comfort. The learning process that could best account for Belinda's pleasant feelings is
a. operant conditioning. b. observational learning. c. delayed reinforcement. d. classical conditioning.
Mike is a great football player. Last Saturday, his new girlfriend
attended the game to watch him play, and Mike played even better than usual. Mike's enhanced performance demonstrates the phenomenon known as A) social influence. B) social facilitation. C) social conformity. D) the bystander effect.
What is the glue that holds neurons together?
a. Myelin b. Dendrites c. Glia d. Synapses
As we age, the total amount of time we sleep ___________, and the proportion of REM sleep ___________
a. increases; increases c. increases; decreases b. decreases; decreases d. decreases; increases