Supplementary materials to "The conception of substitution of the equals sign plays a unique role in students' algebra performance"

Supplementary materials to "Simsek, E., Xenidou-Dervou, I., Karadeniz, I., & Jones, I. (2019). The conception of substitution of the equals sign plays a unique role in students' algebra performance. Journal of Numerical Cognition, 5(1), 24-37. https://doi.org/10.5964/jnc.v5i1.147 Dataset: Secondary school students were asked to rate the ‘cleverness’ of operational, sameness, and substitution definitions of the equals sign and completed an algebra test. The data shows their responses to the test. (.csv); Instrument: This instrument consists of the equals sign (Items 1-2) and algebra test (Items 3-11). It has been used to assess secondary students’ conceptions of the equals sign and their algebra performance. (.pdf) notReviewed publishedVersion