Unintended differences between the groups in an experiment may introduce confounds; these differences reflect a condition known as _____ bias.
A) selection
B) assignment
C) directionality
D) sampling

Question

Quizplus · Accepted Answer

Selection bias occurs when there are systematic differences between the groups being studied that are not related to the treatment or intervention being investigated. This can happen if, for example, participants are not randomly selected or assigned to groups. The other options (B, C, and D) are not directly related to this type of bias.

Unintended Differences Between the Groups in an Experiment May Introduce