William James is noted for founding the ______ school of psychology

The longest-running longitudinal study started in what year?

a. 1903 b. 1921 c. 1956 d. 1975

Professor Cole is discussing aggression as a dependent variable in his experiment. He says that aggression is the amount of time that a child holds a toy weapon. This best illustrates a(n):

a. operational definition of playing with a toy weapon. b. confounding variable. c. operational definition of aggression. d. nominal level of measurement.