Type II error

the error of failing to reject the null hypothesis when it is in fact not true. Investigators make this error if they conclude that a particular effect or relationship does not exist when in fact it does. The probability of committing a Type II error is called the beta (β) level of a test. Conversely, the probability of not committing a Type II error (i.e., of detecting a genuinely significant difference between samples) is called the power of the test, where power = 1 – β. Also called beta error.

Browse dictionary by letter

a b c d e f g h i j k l m n o p q r s t u v w x y z

Psychology term of the day

January 13th 2025

occupational counseling

an early 20th-century approach to vocational guidance. Three steps were identified in the process: (a) relevant knowledge of self, (b) realistic knowledge of occupations, and (c) true reasoning in making sensible choices. [proposed by U.S. educator Frank Parsons (1854–1908)]