A major threat to internal validity is:
A) confounding
B) deviant-case analysis
C) truncated range
D) dependent variables

Question

Quizplus · Accepted Answer

Confounding occurs when an outside variable influences both the independent and dependent variables, making it difficult to determine the true source of any effects observed. This threatens the internal validity of a study because it undermines the ability to establish a causal relationship between the variables of interest.

A Major Threat to Internal Validity Is