In the field of academic psychology, the big five personality traits are the most widely used and widely recognised model of personality. This is the sort of information that is covered in an introductory college-level course on personality psychology. The statistical analysis of test takers' responses yielded the big five. The subject of "what is the best way to describe an individual?" can be examined by researchers by factoring the replies of hundreds of people to dozens of personality items. Although there may be an infinite number of personality traits, research with large samples from all over the world suggests that extraversion, neuroticism, agreeableness, conscientiousness, and openness to experience are particularly important in explaining people's responses to personality questionnaires.