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John Opfer
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The development of numerical estimation evidence for multiple representations of numerical quantity
RS Siegler, JE Opfer
Psychological science 14 (3), 237-250, 2003
14532003
Representational change and children's numerical estimation
JE Opfer, RS Siegler
Cognitive Psychology 55 (3), 169-195, 2007
4482007
Revisiting preschoolers' living things concept: A microgenetic analysis of conceptual change in basic biology
JE Opfer, RS Siegler
Cognitive Psychology 49 (4), 301-332, 2004
2872004
How 15 hundred is like 15 cherries: Effect of progressive alignment on representational changes in numerical cognition
CA Thompson, JE Opfer
Child Development 81 (6), 1768-1786, 2010
2662010
The logarithmic‐to‐linear shift: One learning sequence, many tasks, many time scales
RS Siegler, CA Thompson, JE Opfer
Mind, Brain, and Education 3 (3), 143-150, 2009
2252009
Cognitive foundations for science assessment design: Knowing what students know about evolution
JE Opfer, RH Nehm, M Ha
Journal of Research in Science Teaching 49 (6), 744-777, 2012
2052012
Early development of spatial‐numeric associations: Evidence from spatial and quantitative performance of preschoolers
JE Opfer, CA Thompson, EE Furlong
Developmental Science 13 (5), 761-771, 2010
1982010
Identifying living and sentient kinds from dynamic information: The case of goal-directed versus aimless autonomous movement in conceptual change
JE Opfer
Cognition 86 (2), 97-122, 2002
1922002
Reasoning about natural selection: diagnosing contextual competency using the ACORNS instrument
RH Nehm, EP Beggrow, JE Opfer, M Ha
The American Biology Teacher 74 (2), 92-98, 2012
1802012
Development of the animate-inanimate distinction
JE Opfer, SA Gelman
The Wiley-Blackwell handbook of childhood cognitive development 2, 213-238, 2011
1732011
Development of the animate–inanimate distinction
SA Gelman, JE Opfer
Blackwell handbook of childhood cognitive development, 151-166, 2002
1582002
Costs and benefits of representational change: Effects of context on age and sex differences in symbolic magnitude estimation
CA Thompson, JE Opfer
Journal of Experimental Child Psychology 101 (1), 20-51, 2008
1402008
Children are not like older adults: A diffusion model analysis of developmental changes in speeded responses
R Ratcliff, J Love, CA Thompson, JE Opfer
Child Development 83 (1), 367-381, 2012
1312012
The trouble with transfer: Insights from microgenetic changes in the representation of numerical magnitude
JE Opfer, CA Thompson
Child Development 79 (3), 788-804, 2008
1192008
Cognitive constraints on how economic rewards affect cooperation
EE Furlong, JE Opfer
Psychological Science 20 (1), 11, 2009
1112009
Development of spatial-numerical associations
K McCrink, JE Opfer
Current directions in psychological science 23 (6), 439-445, 2014
1102014
The powers of noise‐fitting: Reply to Barth and Paladino
JE Opfer, RS Siegler, CJ Young
Developmental Science 14 (5), 1194-1204, 2011
1012011
How numbers bias preschoolers’ spatial search
JE Opfer, EE Furlong
Journal of Cross-Cultural Psychology 42 (4), 682-695, 2011
862011
Children's and adults' models for predicting teleological action: The development of a biology‐based model
JE Opfer, SA Gelman
Child development 72 (5), 1367-1381, 2001
802001
Representational change and magnitude estimation: Why young children can make more accurate salary comparisons than adults
JE Opfer, JM DeVries
Cognition 108 (3), 843-849, 2008
792008
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