Biological or psychological changes in the respondents during the course of a study which are not due to the experimental variable are called:
A) maturation
B) testing
C) instrumentation
D) experimental mortality

Question

Quizplus · Accepted Answer

Maturation refers to biological or psychological changes that occur naturally over time, and are not due to the experimental variable. Testing refers to changes in respondents' behavior or attitudes that may result from participating in the study or being tested multiple times. Instrumentation refers to errors in measuring or recording data, and experimental mortality refers to the loss of respondents during the course of the study.

Biological or Psychological Changes in the Respondents During the Course