Supplementary materials to “Exploring cognitive predictors: Examining varied impact on early number skills in a longitudinal study” [Other]

Supplementary materials [Other]. The related article is Karlsson, A. M. C., Skagerlund, K., Skagenholt, M., & Träff, U. (2026). Exploring cognitive predictors: Examining varied impact on early number skills in a longitudinal study. Journal of Numerical Cognition, 12, Article e15049. https://doi.org/10.5964/jnc.15049 The Supplementary Materials consist of additional materials: Appendix A: Descriptive statistics and Pearson correlation for all domain-general and domain-specific variablesacross the three measurement points (kindergarten, first grade, second grade).; Appendix B: Homoscedasticity and linearity plots for all regression analyses reported in the manuscript. These figures are directly exported from SPSS to ensure full transparency.; Supplementary Material: Additional hierarchical regression analyses conducted to addressreviewer comments regarding Hypothesis 1. Includes extended models examining unidirectional and bidirectional relationships among Counting Skills, Digit Magnitude Comparison, and Number Line Estimation, as well as expanded domain-specific predictor sets. unknown unknown