It has been reported that average scores on national exams such as the Scholastic Aptitude Test (SAT) have declined in recent years. Researchers interested in exploring this intensively interview students who just took the exam, took it last year, and took it five years ago. This method is __________.
A. longitudinal
B. experimental
C. correlational
D. cross-sectional
Answer: D
Psychology
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One important implication of the doctrine of specific nerve energies was that
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