The present report summarizes the analyses of the calibration data for the electronic Test of Early Numeracy (e-TEN), an adaptive, iPad-based test of early numeracy achievement. A total of 794 children age 3 years to 8 years-11months from two states were tested.Items were designed to map ontoseven theoretical domains: verbal counting, numbering, numerical relations, numeral literacy, single-digit calculation, multi-digit calculation and base-ten place-value. Analysis indicated a strong single factor—aunidimensional structure across all domains.A Wright map of calibrated item difficultyindicated that items were fairly evenly distributed along the entire continuumof the early numeracy.
Liu, Y., McCarthy, E., Baroody, A. J., & Eiland, M. D. (2019). Analysis of the e-TEN calibration data. In S. Otten, A. G. Candela, Z. de Araujo, C. Haines, & C. Munter (Eds.), Proceedings of the Forty-First Annual Meeting of the North American Chapter of the International Group for the Psychology of Mathematics Education (pp. 1862-1866). St Louis, MO: University of Missouri.