Heywood case

any correlation coefficient, regression coefficient, factor loading, or similar parameter estimate having a value that is impossible or very rare (e.g., a negative error variance estimate). Heywood cases may indicate any of the following: a sample that is too small to adequately estimate the parameters; data that do not have a normal distribution or that contain outliers; a misspecified model that is not appropriate for the data; or a parameter whose true value is so close to a boundary (e.g., 1 or 0) in the population that its estimate exceeded this limit due to sampling fluctuation.

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Psychology term of the day

November 28th 2024

indirect method of therapy

a method of conducting therapy, particularly exemplified by client-centered therapy, in which the therapist does not attempt to direct the client’s communication or evaluate the client’s remarks, although he or she may refer back to the client’s remarks or restate them (see restatement).