“There is nothing as practical as a good theory” was Kurt Lewin’s (1943) way of asserting the value of theory in guiding research that addresses broad social problems. But psychological theory also ...

Why do some employees do better than others? According to goal-setting theory, one reason is that they have better, clearer goals. These goals guide their behavior towards better workplace output.

The accelerating expansion of the Universe, first observed in 1998, remains one of the most profound mysteries in modern ...