Preschool one- and two-knowers perform at least 0.5 SDs lower on the kindergarten number sets test than early cardinal-principle knowers¶

Claim · All claims
Evidence · 1 study · associational r2 · q3
Currency · newest study 2016 · not yet checked against its sources · not reviewed by a person

Subclaims¶

q3 i? Children who were one- or two-knowers at the beginning of preschool scored at least 0.5 SDs lower on kindergarten number sets, depending on item type, than early CP-knowers, controlling multiple other factors; the article prints no standardized effect size statistic for this group contrast. → Moore 2016

Evidence¶

Moore 2016¶

Moore, A. M., vanMarle, K., & Geary, D. C. (2016). Kindergartners' Fluent Processing of Symbolic Numerical Magnitude is Predicted by Their Cardinal Knowledge and Implicit Understanding of Arithmetic Two Years Earlier. Journal of Experimental Child Psychology. https://doi.org/10.1016/j.jecp.2016.05.003

q3 · i? · associational · r2

Longitudinal comparison of knower-level groups within the 112-child sample; one- and two-knowers performed "at least 0.5 SDs lower" than CP-knowers on kindergarten number sets. The article prints no d, g, or other standardized effect size statistic for this contrast, so no effect size is coded. In regression, the two-knower deficit was significant (p = .009) while the one-knower effect was a trend (p = .101).

"Children who were one- and two-knowers at the beginning of preschool performed at least 0.5 SDs lower on the number sets test, depending on item type, in kindergarten than did early cardinal principle knowers, controlling multiple other factors"

Discussion¶

Learner Variables¶

• Number Sense — predictor: learners who differ on it differ in outcomes

Related Claims¶

• Preschoolers' cardinal knowledge predicts fluent processing of symbolic and nonsymbolic magnitudes on the kindergarten number sets test two years later — a broader claim this one bears on
• Preschoolers' implicit understanding of arithmetic (nonverbal calculation) predicts later number sets fluency above and beyond cardinal knowledge — related
• Numeral recognition is the strongest predictor of early cardinal principle knower status, with a 1 SD increase yielding a 3.5-fold increase in odds — related