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knockdown

n. the alteration of a particular gene in an individual organism or in a line of organisms by an experimenter so that the gene is present but its effects are not manifested. Also called gene knockdown.

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Psychology term of the day

June 18th 2024

two-parameter model

two-parameter model

in item response theory, a model that specifies two parameters affecting an individual’s response to a particular test item: (a) the difficulty level of the item and (b) the item discriminability. See also Rasch model; three-parameter model.