2014


Federer, M. R., Nehm, R., Opfer, J. E., & Pearl, D. (2014). Using a constructed-response instrument to explore the effects of item position and item features on the assessment of written scientific explanations. Research in Science Education. [31.pdf]


Kanayet, F. J., Opfer, J. E., & Cunningham, W. A. (2014). The value of numbers in economic rewards. Psychological Science, 25, 1534 - 1545. [30.pdf]


McCrink, K., & Opfer, J. E. (2014). Development of spatial-numerical associations. Current Directions in Psychological Science, 23, 439 - 445. [29.pdf]


Opfer, J. E., & Thompson, C. A. (2014). Numerical estimation under supervision. In Bello P., Guarini M., McShane M. & Scassellati B. (Eds.) Proceedings of the 36th Annual Conference of the Cognitive Science Society (pp. 1586 - 1591). Austin TX: Cognitive Science Society.


Thompson, C. A., & Opfer, J. E. (2014). Affective constraints on acquisition of musical concepts: Children's and adults' development of the major-minor distinction. Psychology of Music. [28.pdf]


2013


Furlong, E. E., & Opfer, J. E. (2013). Cooperation decreases with development of number sense. In M. Knauff, M. Pauen, N. Sebanz, & I. Wachsmuth (Eds.), Proceedings of the 35th Annual Conference of the Cognitive Science Society. Austin, TX: Cognitive Science Society.


Kanayet, F. J., Opfer, J. E., & Cunningham, W. A. (2013). Effects of numeric magnitude on the cortical valuation network. In M. Knauff, M. Pauen, N. Sebanz, & I. Wachsmuth (Eds.), Proceedings of the 35th Annual Conference of the Cognitive Science Society. Austin, TX: Cognitive Science Society.


Kanayet, F. J., Opfer, J. E., Cunningham, W. A., & Sederberg, P. (2013). Importance of numeric information processing for the valuation of monetary rewards. Journal of Cognitive Neuroscience, S118.


2012


Nehm, R., Beggrow, E. P., Opfer, J. E., & Ha, M. (2012). Reasoning about natural selection: Diagnosing contextual competency in evolutionary reasoning using the ACORNS instrument. American Biology Teacher, 74, 92-98. [27.pdf]


Opfer, J. E., & Martens, M. M. (2012). Learning without representational change: Development of numerical estimation in individuals with Williams' Syndrome. Developmental Science, 15, 863 - 875. [26.pdf]


Opfer, J. E., Nehm, R., & Ha, M. (2012). Cognitive foundations for science assessment design: Knowing what students know about evolution. Journal of Research in Science Teaching, 49, 744-777. [25.pdf]


Opfer, J. E., & Siegler, R. S. (2012). Development of quantitative thinking. In K. Holyoak and R. Morrison (Eds.), Oxford Handbook of Thinking and Reasoning. [24.pdf]


Ratcliff, R., Love, J., Thompson, C. A., & Opfer, J.E. (2012). Children are not like older adults: A diffusion model analysis of developmental change in speeded responses. Child Development, 83, 367-381. [23.pdf]


Thompson, C. A.*, & Opfer, J. E. (2012). The trouble with transfer: Insights from the study of learning. In N. M. Seel (Ed.), Encyclopedia of the Sciences of Learning. Springer.


2011


Opfer, J. E., Siegler, R.S., & Young, C.J. (2011). The powers of noise-fitting: Reply to Barth and Paladino. Developmental Science, 14, 1194 - 1204. [22.pdf]


Opfer, J. E., & Furlong, E. E. (2011). How numbers bias preschoolers' spatial search. Journal of Cross-Cultural Psychology, 42, 682-695. [21.pdf]


Opfer, J. E., & Sloutsky, V. M. (2011). On the design and function of rational arguments. Behavioral and Brain Sciences, 34, 85-86. [20.pdf]


Thompson, C. A., & Opfer, J. E. (2011). Learning Linear Spatial-Numeric Associations Improves Memory for Numbers. In L. Carlson, C. Hölscher and T. Shipley (Eds.), Proceedings of the XXXIII Annual Conference of the Cognitive Science Society. Mahwah, NJ: Erlbaum.


Young, C. J., & Opfer, J. E. (2011). Psychophysics of numerical representation: A unified approach to single- and multi-digit magnitude estimation. Journal of Psychology, 219, 58-63. [19.pdf]


Young, C. J., Marciani, F., Opfer, J. E. (2011). Linear Numerical Magnitude Representations Aid Memory for Single Numbers. In L. Carlson, C. Hölscher and T. Shipley (Eds.), Proceedings of the XXXIII Annual Conference of the Cognitive Science Society. Mahwah, NJ: Erlbaum.


2010


Kanayet, F., Opfer, J. E., & Cunningham, W. A. (2010). Electrophysiological evidence for multiple representations of number in the human brain. In S. Ohlsson & R. Catrambone (Eds.), Proceedings of the XXXII Annual Conference of the Cognitive Science Society. Mahwah, NJ: Erlbaum.


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, 13, 761 - 771. [18.pdf]


Opfer, J. E., & Gelman, S. A. (2010). Development of the animate-inanimate distinction. In U. Goswami (Ed.), Wiley-Blackwell Handbook of Childhood Cognitive Development (pp. 213 - 238). [17.pdf]


Tang, Y., Young, C. J., Myung, J. I., Pitt, M. A., & Opfer, J. E. (2010). Optimal inference and feedback for representational change. In S. Ohlsson & R. Catrambone (Eds.), Proceedings of the XXXII Annual Conference of the Cognitive Science Society. Mahwah, NJ: Erlbaum.


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, 81, 1768-1786. [16.pdf]


2009

Bulloch, M. J., & Opfer, J. E. (2009). What makes relational reasoning smart? Revisiting the relational shift in cognitive development. Developmental Science, 12, 114 - 122. [15.pdf]


Furlong, E. E., & Opfer, J. E. (2009). Cognitive constraints on how economic rewards affect cooperation. Psychological Science, 20, 11 - 16. [14.pdf]


Opfer, J. E., & Bulloch, M. J. (2009). Concept development. In E. Anderman & L. Anderman (Eds.), Psychology of Classroom Learning: An Encyclopedia. Detroit: Macmillan Reference.


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. [13.pdf]


2008

Opfer, J. E., & Doumas, L. A. A. (2008). Analogy and conceptual change. Behavioral and Brain Sciences, 31, 35. [12.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. [11.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.[10.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. [09.pdf]


2007

Opfer, J. E., & Bulloch, M. J. (2007). Causal relations drive young children's induction, naming, and categorization. Cognition, 105, 207-217. [08.pdf]


Opfer, J. E., & Siegler, R. S. (2007). Representational change and children's numerical estimation. Cognitive Psychology, 55, 169-195. [07.pdf]


Opfer, J. E., & Thompson, C. A. (2007). What is the trouble with transfer? In McNamara, D. S., &  Trafton, G. (Eds.), Proceedings of the XXIX Annual Conference of the Cognitive Science Society. Mahwah, NJ: Erlbaum.


Opfer, J. E., Thompson, C. A., & DeVries, J. M. (2007). Why children make "better" estimates of fractional magnitude than adults. In McNamara, D. S., & Trafton, G. (Eds.), Proceedings of the XXIX Annual Conference of the Cognitive Science Society. Mahwah, NJ: Erlbaum.


2006

Opfer, J. E., & Devries, J. (2006). How adults acquire children's representation of numeric quantity. Proceedings of the Fifth International Conference on Development and Learning, Bloomington, IN.


Opfer, J. E., & Thompson, C. A. (2006). Even early representations of numerical magnitude are spatially organized: Evidence for a directional magnitude bias in pre-reading preschoolers. In Sun, R., & Miyaki, N. (Eds.), Proceedings of the XXVIII Annual Conference of the Cognitive Science Society. Mahwah, NJ: Erlbaum


2005

Thompson, C. A., & Opfer, J. E. (2005). Everyday constraints on learning: Children's and adults' development of the major-minor distinction. In Bara, B. G., Barsalou, L.W., & Bucciarelli, M. (Eds.), Proceedings of the XXVII Annual Conference of the Cognitive Science Society, 2184-2189. Mahwah, NJ: Erlbaum.


Opfer, J. E., & Siegler, R. S. (2005). Microgenetic changes in representations of numerical magnitude. In Bara, B. G., Barsalou, L.W., & Bucciarelli, M. (Eds.), Proceedings of the XXVII Annual Conference of the Cognitive Science Society, 2184-2189. Mahwah, NJ: Erlbaum.


2004

Opfer, J. E., & Siegler, R. S. (2004). Revisiting preschoolers' living things concept: A microgenetic analysis of conceptual change in basic biology. Cognitive Psychology, 49, 301-332. 06.pdf


2003

Siegler, R. S., & Opfer, J. E. (2003). The development of numerical estimation: Evidence for multiple representations of numerical quantity. Psychological Science, 14, 237 - 243. 05.pdf


Opfer, J. E. (2003). Life, liveliness, and living kinds: How young children think about the biological world [Review of Young children's naive thinking about the biological world]. International Journal of Behavioral Development, 27, 375 - 380. 04.pdf


2002

Opfer, J. E. (2002). Identifying living and sentient kinds from dynamic information: The case of goal-directed versus aimless autonomous movement in conceptual change. Cognition, 86, 97 - 122. 03.pdf


Gelman, S. A., & Opfer, J. E. (2002). Development of the animate-inanimate distinction. In U. Goswami (Ed.), Blackwell Handbook of Childhood Cognitive Development (pp. 151 - 166). Oxford, UK: Blackwell. 02.pdf


2001

Opfer, J. E., & Gelman, S. A. (2001). Children's and adults' models for predicting teleological action: The development of a biology-based model. Child Development, 72, 1367 - 1381. 01.pdf

DCS Lab

Psychology Building 255

1835 Neil Avenue

Columbus, OH 43210 614.292.8941

Ten Most Cited Articles:
Siegler, R. S., & Opfer, J. E. (2003). The development of numerical estimation: Evidence for multiple representations of numerical quantity. Psychological Science, 14, 237 - 243. [.pdf]
Opfer, J. E. (2002). Identifying living and sentient kinds from dynamic information: The case of goal-directed versus aimless autonomous movement in conceptual change. Cognition, 86, 97 - 122. [.pdf]
Opfer, J. E., & Siegler, R. S. (2004). Revisiting preschoolers' living things concept: A microgenetic analysis of conceptual change in basic biology. Cognitive Psychology, 49, 301-332. [.pdf]
Opfer, J. E., & Siegler, R. S. (2007). Representational change and children's numerical estimation. Cognitive Psychology, 55, 169-195. [.pdf] 
Opfer, J. E., & Gelman, S. A. (2001). Children's and adults' models for predicting teleological action: The development of a biology-based model. Child Development, 72, 1367 - 1381. [.pdf]
Furlong, E. E., & Opfer, J. E. (2009). Cognitive constraints on how economic rewards affect cooperation. Psychological Science, 20, 11 - 16. [.pdf]
Opfer, J. E., & Bulloch, M. J. (2007). Causal relations drive young children's induction, naming, and categorization. Cognition, 105, 207-217. [.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, 13, 761 - 771. [.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]
 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]publications_files/SO%202003.pdfpublications_files/Opfer%202002.pdfpublications_files/OS%202004.pdfpublications_files/OS%202008_1.pdfpublications_files/OpferGelman2001.pdfpublications_files/FurlongOpfer%202009_1.pdfpublications_files/OpferBulloch%202007_1.pdfpublications_files/Developmental%20Science%202010%20Opfer_1.pdfpublications_files/ThompsonOpfer%202008.pdfpublications_files/OpferDeVries%202008_1.pdfshapeimage_1_link_0shapeimage_1_link_1shapeimage_1_link_2shapeimage_1_link_3shapeimage_1_link_4shapeimage_1_link_5shapeimage_1_link_6shapeimage_1_link_7shapeimage_1_link_8shapeimage_1_link_9

Developmental

Cognitive Science Lab


John Opfer, Ph.D.