randomized design

any of various experimental designs in which individual participants are assigned to different conditions (groups) using a purely chance process, such as rolling a die. A crucial assumption underlying randomized designs is that any systematic differences between treatment groups will be due to the experimental conditions themselves and not to any other unmeasured factors. Also called randomized group design. Compare nonrandomized design.

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Psychology term of the day

February 28th 2025

common metric

a unit or scale of measurement that is applied to data from different sources. In a meta-analysis, for instance, the results from multiple studies may need to be placed on a common metric so that they may be meaningfully compared.