Changes in the measuring instrument during the course of a study refers to:
A) statistical regression
B) experimental mortality
C) instrumentation
D) history

Question

Quizplus · Accepted Answer

Changes in the measuring instrument during the course of a study refers to instrumentation, which can lead to measurement bias and compromise the validity of study results. Statistical regression (A) refers to the tendency of extreme scores to move towards the average over time, while experimental mortality (B) refers to participants dropping out of a study, both of which are different sources of error. History (D) refers to external events occurring during the course of a study that could influence study outcomes.

Changes in the Measuring Instrument During the Course of a Study