Recent Publications (for full list, click here):

Opfer, J. E., & Furlong, E. E. (2011). How numbers bias preschoolers' spatial search. Journal of Cross-Cultural Psychology. [.pdf]

Opfer, J. E., Siegler, R.S., & Young, C.J. (2011). The powers of noise-fitting: Reply to Barth and Paladino. Developmental Science. [.pdf]

Young, C. J., & Opfer, J. E. (2011). Psychophysics of numerical representation: A unified approach to single- and multi-digit magnitude estimation. Journal of Psychology. [.pdf]

Opfer, J. E., Thompson, C. A., & Furlong, E. E. (2010). Early development of spatial-numeric associations: Evidence from spatial and quantitative performance of preschoolers. Developmental Science. [.pdf]

Thompson, C. A., & Opfer, J. E. (2010). How 15 hundred is like 15 cherries: Effect of progressive alignment on representational changes in numerical cognition. Child Development. [.pdf]

Bulloch, M. J., & Opfer, J. E. (2009). What makes relational reasoning smart? Revisiting the relational shift in cognitive development. Developmental Science, 12, 114 - 122. [.pdf]

Furlong, E. E., & Opfer, J. E. (2009). Cognitive constraints on how economic rewards affect cooperation. Psychological Science, 20, 11 - 16.[.pdf]

Siegler, R. S., Thompson, C. A., & Opfer, J. E. (2009). The logarithmic-to-linear shift: One learning sequence, many tasks, many time scales. Mind, Brain, and Education, 3, 143 -  150. [.pdf]

Opfer, J. E., & DeVries, J. (2008). Representational change and magnitude estimation: Why young children can make more accurate salary comparisons than adults. Cognition, 108, 843 - 849. [.pdf]

Opfer, J. E., & Thompson, C. A. (2008). The trouble with transfer: Insights from microgenetic changes in the representation of numerical magnitude. Child Development, 79, 790 -806. [.pdf]

Thompson, C. A., & Opfer, J. E. (2008). Costs and benefits of representational change: Effect of context on age and sex differences in magnitude estimation. Journal of Experimental Child Psychology, 101, 20 - 51. [.pdf]