Find over 25,000 psychological definitions


critical value

a value used to make decisions about whether a test result is statistically meaningful. For example, to evaluate the result of a t test to determine whether a sample mean is significantly different from the hypothesized population mean, a researcher would compare the obtained test statistic to the values from a t distribution at a given probability level. If the statistic exceeds the critical value within that distribution, the null hypothesis is rejected and the result is considered significant. Also called rejection value. See also critical region.

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

December 26th 2024

developmental dysgraphia

developmental dysgraphia

see disorder of written expression.