Supplementary materials to: Developing a Rigorous Measure of the Pre-School Home Mathematics Environment

Supplementary materials to: Cahoon, A., Cassidy, T., Purpura, D., & Simms, V. (2021). Developing a rigorous measure of the pre-school home mathematics environment. Journal of Numerical Cognition, 7(2), 172-194. https://doi.org/10.5964/jnc.6373 There are five appendices as follows: 1. The full original version of the Pre-school Home Mathematics Questionnaire (PHMQ) which was developed during Study 1 before questionnaire refinement and scale validation 2. Summary of items from PHMQ, how questions were generated and initial item reduction criteria 3. Content validity and 4. Criterion validity dimensions or subscales from PHMQ and sample commentary from interviews 5. Confirmatory factor analysis for the frequency of maths activities scale including one factor model (total frequency of maths activities), five-factor second order model, two-factor model based on the original definitions of direct and indirect numeracy activities by LeFevre et al. (2009) and the best fit model is also discussed