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operation

n.

1. a type of cognitive scheme that is mental (i.e., requires symbols), derives from action, exists in an organized system in which it is integrated with all other operations (structures of the whole), and follows a set of logical rules, most importantly that of reversibility. [postulated by Jean Piaget]

2. a surgical procedure.

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Psychology term of the day

March 28th 2024

misspecification

misspecification

n. the situation in which the number of variables, factors, parameters, or some combination of these was not correctly specified in a statistical model, with the result that the model does not offer a reasonable representation of obtained data. Misspecification is indicated by such things as large residuals between the data and that predicted by the model, large standard errors for the parameter estimates, values for the parameter estimates outside of the normal range (e.g., Heywood cases), or a nonsignificant result from a goodness-of-fit test.