Professor Hardy has spent the last decade conducting a study of the effects of early childhood "wellness" programs on subsequent delinquency. Every year, researchers visit participating families and collect a variety of data. Over the course of ten years, many families have moved away and the research staff has been unable to locate them. What problem has Professor Hardy encountered?
A) cross-sectional distortion
B) cohort distortion
C) panel attrition
D) experimental mortality

Question

Quizplus · Accepted Answer

Professor Hardy has encountered panel attrition, which occurs when participants drop out of a longitudinal study over time, making it difficult to maintain a consistent sample for the duration of the research.

Professor Hardy Has Spent the Last Decade Conducting a Study