Getting better on a task in a study with practice can cause a source of bias called ______.
A) maturation
B) testing effects
C) regression toward the mean
D) mortality

Question

Quizplus · Accepted Answer

The testing effect bias occurs when repeated testing or practice on a task improves a participant's performance, leading to an inflated effect size or skewed results. This can be a confounding variable in experimental research and needs to be controlled for or accounted for in the analysis of data. Maturation refers to natural changes over time, regression toward the mean occurs when extreme scores revert back to the mean over time or with repeated testing, and mortality refers to participants dropping out of a study. While these factors can also affect the results of a study, they are not directly related to the issue of practice or repeated testing.

Getting Better on a Task in a Study with Practice