multilevel modeling

Self-set goals improve academic performance through nonlinear effects on daily study performance

A Bayesian longitudinal moderated mediational model was used to test the effect of students' daily/proximal self-set goals on a final course grade through daily study performance. Thirty-six daily diaries were completed twice a day by 147 sophomore students. Study goals were self-set in the morning and daily performance was self-assessed in the evening. Two independent coders, blind to the hypotheses, evaluated goal specificity and difficulty.

Within- and between-person and group variance in behavior and beliefs in cross-cultural longitudinal data

This study grapples with what it means to be part of a cultural group, from a statistical modeling perspective. The method we present compares within- and between-cultural group variability, in behaviors in families. We demonstrate the method using a cross-cultural study of adolescent development and parenting, involving three biennial waves of longitudinal data from 1296 eight-year-olds and their parents (multiple cultures in nine countries).

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