The decline in college aptitude test scores during the 1960s and 1970s was due in part to:
a. the increasing academic diversity of students taking these tests.
b. the standardization of college aptitude tests on more representative samples of the population.
c. the introduction of new and increasingly difficult aptitude test questions.
d. today's students' inexperience with standardized tests.
Ans: a. the increasing academic diversity of students taking these tests.
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