The term test heterogeneity BEST refers to the extent to which test items measure

Which of the following terms do NOT belong together?

a) structuralism; observable behavior b) Gestalt; whole c) psychoanalysis; unconscious conflict d) natural selection; functionalism

If you wanted to determine whether people are faster at responding to a high intensity light than to a low intensity light you might do an experiment in which participants push a button whenever either a high or low intensity light occurs. If you were concerned with order effects such as learning but also concerned that an equal number of low- and high-intensity trials be presented, you might use

A) randomization within blocks. B) control variables. C) a confounding variable. D) reverse ordering.