When subjects are selected because of the presence or absence of a condition, rather than having a condition assigned to them, the experimenter is testing
A) subject variables
B) construct validity
C) face validity
D) confounding variables

Question

Quizplus · Accepted Answer

Selecting subjects based on the presence or absence of a condition is commonly referred to as a subject variable. Subjects are not assigned a condition; rather, their characteristics are used to categorize them into groups. This can potentially impact the results of the study as other differences between the groups may exist, leading to confounding variables. Therefore, it is important to carefully consider and account for subject variables when conducting research. The other answer choices - construct validity, face validity, and confounding variables - are not directly related to subject selection based on condition presence/absence.

When Subjects Are Selected Because of the Presence or Absence