In a study with a group of individuals being tested in a series of treatment conditions that extends over a relatively long time,it is possible that there will be systematic changes in the participants' physiology or psychology that occur during the time of the study.When these changes influence the participants' scores,causing scores at the end of the study to be different from scores at the beginning,the effect is called ____.
A)history
B)instrumentation
C)maturation
D)regression toward the mean

Question

In a study with a group of individuals being tested in a series of treatment conditions that extends over a relatively long time,it is possible that there will be systematic changes in the participants' physiology or psychology that occur during the time of the study.When these changes influence the participants' scores,causing scores at the end of the study to be different from scores at the beginning,the effect is called ____.
A)​history
B)​instrumentation
C)maturation
D)​regression toward the mean

Quizplus · Accepted Answer

Maturation refers to changes in participants' physiology or psychology that occur over a relatively long time, and can influence their scores. This is commonly seen in studies involving children or elderly participants, as they may undergo physical or cognitive changes that affect their performance on tests over time. History refers to external events or factors that occur during the study period and can affect participants, while instrumentation refers to changes or inconsistencies in the measurement tools used throughout the study. Regression toward the mean refers to the tendency for extreme scores to move closer to the mean upon retesting, and is not related to systematic changes in participants over time.

In a Study with a Group of Individuals Being Tested