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Michael Studies Developmental Differences in Extroversion by Testing 9-, 19-

Question 32

Multiple Choice

Michael studies developmental differences in extroversion by testing 9-, 19-, 39-, and 59-year-old subjects all at the same time. What kind of study is Michael performing?


A) a sequential study
B) a longitudinal study
C) an experimental study
D) a cross-sectional study

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