endogenous

adj. originating within the body as a result of normal biochemical or physiological processes (e.g., endogenous opioids) or of predisposing biological or genetic influences (e.g., endogenous depression). Compare exogenous. —endogenously adv.

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Psychology term of the day

April 30th 2024

t ratio

the formula used for the t test, in which the numerator is the difference between the means of the two groups of interest and the denominator is a measure of the dispersion of the scores used to compute the means. The t value so obtained is compared to a t distribution table to determine if the difference between the means is significant or likely to have been a chance finding.