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1. any physical, mental, or emotional activity directed toward accomplishing a task or transforming inputs in the form of physical materials, information, and other resources into goods or services.

2. the tasks or duties involved in earning a livelihood.

3. in physics, the product of a force and the distance through which its point of application moves, measured in joules. —worker n.

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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.