How have World War I and World War II affected the evolution of psychology, especially psychological testing?
Many people are not aware that psychology's foundation rests on research inquiry. In fact, any science requires a research underpinning. Research allows us put forth hypotheses and to test them empirically. By testing them, we can determine whether our hypotheses are supported with empirical evidence.
What are the dangers of making claims without supporting evidence that can be verified and replicated?