The concepts of reliability and validity and their
associated coefficients typically have been restricted to
a single measurement occasion. This paper describes
dynamic generalizations of reliability and validity that
will incorporate longitudinal or developmental models,
using latent curve analysis. Initially a latent curve model
is formulated to depict change. This longitudinal model
is then incorporated into the classical definitions of reliability
and validity. This approach permits the separation
of constancy or change from the indexes of reliability
and validity. Statistical estimation and hypothesis
testing be achieved using standard structural
equations modeling computer programs. These longitudinal
models of reliability and validity are demonstrated
on sociological psychological data. Index
terms: concurrent validity, dynamic models, dynamic
true score, latent curve analysis, latent trajectory,
predictive validity, reliability, validity.
Tisak, John & Tisak, Marie S. (1996). Longitudinal models of reliability and validity: A latent curve approach. Applied Psychological Measurement, 20, 275-288. doi:10.1177/014662169602000307
Tisak, John; Tisak, Marie S..
Longitudinal models of reliability and validity: A latent curve approach.
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