When one treatment condition has a lasting effect on individuals and influences their scores in future treatments, the study is confounded by ____.
A) history
B) instrumentation
C) carry-over effects
D) progressive error

Question

Quizplus · Accepted Answer

Carry-over effects refer to the lasting effects of one treatment condition on individuals that can influence their scores in future treatments. This can confound the study as it becomes difficult to determine if the results are due to the treatment or the carry-over effects.

When One Treatment Condition Has a Lasting Effect on Individuals