z test

a type of statistical test that compares the means of two different samples to determine whether there is a significant difference between them (i.e., one not likely to have occurred by chance). Generally, this involves comparing the mean from a sample of a population to the mean for the whole population but may also involve comparing the means of two different populations. The z test is based on the normal distribution and is used when a population’s standard deviation is known or the sample is large (greater than 30). The equivalent t test is used with unknown standard deviations or smaller samples.

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Psychology term of the day

February 25th 2025

transcultural psychotherapy

any form of psychodynamic psychotherapy that emphasizes cultural sensitivity and awareness, including culturally defined concepts of emotion, drives, and behavior. In the psychiatric community, the term is used somewhat more often in a sense similar to multicultural therapy in clinical psychology.