Biased Sample Definition | Psychology

Sampling bias occurs when the sample of a population in an experiment is not truly representative of the entire population. It’s a statistical problem in many studies that need to be carefully overcome or pointed out if it should be a consideration.

Many psychology studies naturally involved college students, especially in the United States, where psychology professors had easy access to participants. The problem is, most of these subjects were white, affluent, and young. Yet for decades, people would ascribe these studies as being universal in nature, even though the entire world is full of far more variety (thankfully).