Type I and Type II error. Type I error occurs when one rejects the null hypothesis when it is true and its denoted by alpha (false positive). Type II error occurs when accepts the null hypothesis when it is false and its denoted by beta (false negative).
Fundamental Research Terms Defined. Gorgeous and helpful poster designed by students of UNT Research Center. Add a Dharma symbol (and correct a minor typo) and it could have been the kind of poster one might have seen in the background of "Lost.