Dr Archambault Is Conducting a Longitudinal Study with the Hopes

Multiple Choice

Dr. Archambault is conducting a longitudinal study with the hopes of determining whether hand-eye coordination is affected by aging. Dr. Archambault has his participants complete the same computer-based hand-eye coordination test every year for ten years. Which of the following may threaten the validity of Dr. Archambault's study?

A) age differences
B) age effects
C) practice effects
D) cohort effects