Between 1990 and 2010, Marisol conducted a longitudinal study on childhood depression in New York City. Because many of the participants witnessed the 2001 terrorist attacks on the World Trade Center. Marisol is concerned that ________ effects may influence her findings.
A. practice
B. cross-sectional
C. dropout
D. cohort
Answer:D
Between 1990 and 2010, Marisol conducted a longitudinal study on childhood depression in New York City. Because many of the participants witnessed the 2001 terrorist attacks on the World Trade Center. Marisol is concerned that ________ effects may influence her findings.
A. practice B. cross-sectional C. dropout D. cohort