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Grimm, Kevin J.; Fine, Kimberly; Stegmann, Gabriela – International Journal of Behavioral Development, 2021
Modeling within-person change over time and between-person differences in change over time is a primary goal in prevention science. When modeling change in an observed score over time with multilevel or structural equation modeling approaches, each observed score counts toward the estimation of model parameters equally. However, observed scores…
Descriptors: Error of Measurement, Weighted Scores, Accuracy, Item Response Theory