Long-term potentiation, which enhances learning, depends upon the neurotransmitter

A researcher wants to determine whether students sitting in the front of the class earn higher grades than those sitting in the back of the class. In this study, the dependent variable is

a. students in the front of the class. c. students in the back of the class. b. grades. d. higher scores.

At the end of her psychology class, Railene took a test designed to assess how well she had mastered the material. Railene's psychology final exam would most likely be considered:

a. an intelligence test b. an achievement test c. an aptitude test d. a standardized correlational test