There is a distinction that one learns about on the first day of a course in psychological research methods. It is the difference between internal and external validity. Internal validity is ...

Well, I'm back after my holiday hiatus. Many of my colleagues across the country are back in the classroom already. I return there early next week. As I was preparing for my spring semester classes ...

Investigators across five continents reported that they were able to replicate only about 40 percent of the results from 100 previously published studies in cognitive and social psychology, in a study ...