Taking a Broader Perspective: the Problem of External Validity Which

Multiple Choice

Taking a Broader Perspective: The Problem of External Validity Which is a major limitation of field experiments compared with studies conducted in the laboratory?

A) It is harder to employ unobtrusive measures.
B) They have less external validity.
C) We cannot manipulate antecedent conditions.
D) We often have little or no control over who participates in the experiment.