case alternation

in reading research, a procedure for stimulus presentation in which the characters of stimulus words switch between upper and lower case. The change is usually made in one of six ways: (a) to the complete word (APPLE/apple), (b) to alternate letters (ApPlE), (c) after the second letter (APple), (d) after the third letter (APPle), (e) after the fourth letter (APPLe), or (f) after each pair of letters (APplE).

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Psychology term of the day

December 26th 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.