To measure the effects of task complexity on an individual's perception of time,a researcher has one group of participants do simple addition problems and another group solve complex mathematical formulas.Both groups are then asked to estimate the time elapsed since they began the task.Later,the researcher finds out that the participants given the complex task were in a room with higher noise levels than the other group.In this study,which term best describes the noise level?
A)the placebo effect.
B)a dependent variable.
C)a confounding variable.
D)an independent variable.

Question

Quizplus · Accepted Answer

The noise level is a confounding variable because it was not intentionally manipulated by the researcher but can affect the participants' perception of time, potentially compromising the validity of the study.

To Measure the Effects of Task Complexity on an Individual's