Glossary

In this section we present a brief definition of technical terms as used repeatedly in this text. The intent is to provide a conceptual reminder about the term, rather than a replacement of the more complete presentation or discussion presented in the chapters. For named statistics and for text sections discussing each term consult the subject index.

Additivity   Indicating that the regression of Y on X is constant over the values of other predictors.

Augmentation (or synergy)   Interactions in which the effect of an IV on Y is larger for high values of another IV.

Autocorrelation   In longitudinal data, correlations among observations at adjacent or nearly adjacent time points; also used in time series analysis to refer to correlations ...

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