vestibular nystagmus

involuntary eye movements consisting of slow drift in one direction followed by a rapid movement in the opposite direction, caused by stimulation of the vestibular apparatus during rotation of the head. Also called rotational nystagmus. Compare physiological nystagmus.

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Psychology term of the day

December 20th 2024

factor method

any means by which latent variables (factors) are extracted or identified in factor analysis. Widely used factor methods include principal components analysis, which seeks to find a set of linear combinations called components that help explain the correlations among variables; and principal-axis factor analysis, in which underlying dimensions or factors are sought to explain the correlations among variables after separating out communality and putting aside the error variance in a set of variables.