Taking a Broader Perspective: the Problem of External Validity We

Multiple Choice

Taking a Broader Perspective: The Problem of External Validity We must be cautious when drawing conclusions about concepts like "learning" from experimental results because

A) different operational definitions may lead to diverse outcomes.
B) experimenters can only study variables they can directly observe.
C) experimenters cannot operationally define concepts like learning.
D) statistically significant results may be due to Type 2 error.