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

Question

Quizplus · Accepted Answer

Carryover effects occur when the effect of a treatment condition influences the scores or behavior of participants in later treatments. This can create a confound, as it becomes difficult to determine whether any changes in scores or behavior are due to the treatment itself or the carryover effect. History effects refer to external events that could influence the results of the study, instrumentation refers to issues with the measurement tools being used, and progressive error refers to consistent errors in measurement that can affect the validity of the results.

When One Treatment Condition Has a Lasting Effect on the Participants