eta squared

(symbol: η²) a measure of the amount of variance in a dependent variable that can be explained by one or more independent variables, as calculated in a variety of statistical procedures. In an analysis of variance, for example, eta squared is calculated as the sum of squares for the treatment (i.e., sum of squared differences between a group mean and the grand mean) divided by the total sum of squares. Eta squared is often used as an effect size measure.

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Psychology term of the day

February 24th 2025

usability engineering

a specialty that applies knowledge of human capabilities and limitations to the design of systems (typically human–computer systems) with the goal of ensuring ease of use. This can be achieved by enhancing such attributes as design intuitiveness, learnability, and comprehensibility. See also engineering psychology; user-centered design.