EIRT addition-strategy parameters show convergent validity with broad mathematics achievement (R² = .42) but not reading efficiency (R² = .08)¶

Claim · All claims
Evidence · 1 study (2 entries) · associational r2 · q3
Currency · newest study 2018 · not yet checked against its sources · not reviewed by a person

Subclaims¶

q3 i? Solution time slope, accuracy slope, and proportion of immature counting use each significantly predicted broad math standard scores, jointly accounting for R² = .42. → Rhodes 2018 q3 i? Neither slope predicted reading efficiency significantly, and the reading model explained little variance (R² = .08), supporting discriminant validity. → Rhodes 2018 (2)

Evidence¶

Rhodes 2018¶

Rhodes, K. T., Lukowski, S., Branum-Martin, L., Opfer, J., Geary, D. C., & Petrill, S. A. (2018). Individual Differences in Addition Strategy Choice: A Psychometric Evaluation. Journal of Educational Psychology. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11360214/

q3 · i? · associational · r2

Post hoc simultaneous-entry regression of continuous EIRT slope parameters on Woodcock-Johnson Broad Math composite for the 376-adolescent sample. Intercepts were excluded due to multicollinearity (VIF > 10).

"The strategy variables accounted for a significant portion of variance in broad math ability standard scores, R2 = .42, F(3,176) = 42.88, p < .001."

Rhodes 2018 (2)¶

Rhodes, K. T., Lukowski, S., Branum-Martin, L., Opfer, J., Geary, D. C., & Petrill, S. A. (2018). Individual Differences in Addition Strategy Choice: A Psychometric Evaluation. Journal of Educational Psychology. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11360214/

q3 · i? · associational · r2

Post hoc regression of the same strategy parameters on TOWRE total word reading efficiency. The proportion of immature counting was a significant reading predictor (B = −12.34, p = .01), a partial exception the article notes.

"The EIRT model parameters also evidenced discriminant validity with reading efficiency. Neither the solution time slope nor the accuracy slope was a significant predictor of reading efficiency B = −.76, t(137) = −1.13, p = .26, and B = 26.28, t(137) = 1.89, p = .06, respectively."

Discussion¶

Related Claims¶

• A minority of adolescents were model-predicted to benefit greatly from min-counting yet used it significantly less often than peers and scored about one standard deviation below average in broad math achievement — related
• Symbolic number comparison accuracy is the only number sense measure with a significant partial correlation with math — related
• The effect of min-counting on solution time and accuracy varies significantly across both items and persons — related