In a within-subjects study that extends over a relatively long time, it is possible that there will be systematic changes in the participants’ skills or knowledge 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.

Maturation effect

Explanation:

The maturation effect is usually defined as a biological process that is commonly observed in an individual, where noticeable changes are being made and that shows variations in a systematic way over a due course of time. It is independent of any external events. For example, a person growing taller, stronger, confident and older over a definite period of time.

The above given condition is an example of this maturation effect.

answer; standardization;