DrKiwanis Is Conducting a Longitudinal Study on the Development of Externalizing

Multiple Choice

Dr.Kiwanis is conducting a longitudinal study on the development of externalizing behaviours in children.He samples children each year as they age but has found that,each year,his sample size is getting smaller because families are dropping out of the study.This is called

A) developmental effects.
B) cohort effects.
C) attrition.
D) infant determinism.