between-groups variance

the variation in experimental scores that is attributable only to membership in different groups and exposure to different experimental conditions. It is reflected in the analysis of variance by the degree to which the several group means differ from one another and is compared with the within-groups variance to obtain an F ratio. Also called between-subjects variance.

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Psychology term of the day

May 9th 2024

nonadditive

adj. describing values or measurements that cannot be meaningfully summarized through addition because the resulting total does not correctly reflect the underlying properties of and associations between the component values. For example, if two variables a and b interact to influence another variable y, the addition of the separate effects of a and b will not equal the total effect since the contribution of the interaction needs to be included. Compare additive.