Cattell’s personality trait theory

an approach to personality description based on the identification of traits through factor analysis and their classification into surface traits and the 16 source traits that underlie them. [Raymond B. Cattell]

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Psychology term of the day

March 17th 2025

z -score transformation

a statistical procedure used to convert raw data into z scores, dimensionless quantities that may be interpreted without reference to the original units of measurement. It is performed by subtracting the reference value (the sample average) from each data point and dividing the difference by the standard deviation of the sample.