In one study, volunteers gradually reduced the number of hours that they slept each night, until they felt that they had reached their limit. On the average, this limit was

Anger, frustration and pride are emotions that are tolerated by individuals who grow up in cultures that _______

a. value the independent self. b. value the interdependent self. c. are sensitive to slights against others in their in-group. d. value harmony and meeting your obligations.

Researchers can make causal inferences for main effects tested with __________ strategies, but not for main effects tested with __________ strategies

a. computerized statistical; hand-calculated statistical b. experimental; nonexperimental c. nonexperimental; experimental d. nonparametric; parametric