THE EFFICACY OF THE SUPPLEMENTAL INSTRUCTION …

ANCOVA (SI by gender with prior GPA) indicated that prior GPA was a useful covariate. The effect of SI participation after prior GPA and gender were controlled for was statistically significant (p < .0005) and practically significant (d=.48; or a 2-letter grade improvement). The adjusted mean letter grade for the SI participants was a “B-” ................
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