12. (CONCEPTUAL-17–21) IF I WANT TO KNOW WHETHER IQ SCORES TEND TO R...

1-12. (conceptual-17–21) If I want to know whether IQ scores tend to remain constant in

individuals over the adult years, which of the following research designs should I use to study

the question?

a. longitudinal

b. sequential

c. cross-sectional

*d. either a or b