| 2025 | CogSci | Mixing Words and Pictures: Mixed Evidence for Common Conceptual Representations. | Hyekyung Park, John Opfer |
| 2025 | CogSci | The Role of Object Attention in Relational Mapping Changes Over Development. | Yujia Zhang, John Opfer |
| 2024 | CogSci | Visual alignment promotes rapid learning of functional relations. | Yujia Zhang, John Opfer |
| 2023 | CogSci | Children Are Not Just Noisy Adults: Disentangling Noise and Bias in Numerical Estimation. | Hyekyung Park, John Opfer |
| 2022 | CogSci | Conceptual Prerequisites for Proportional Analogy. | Shuyuan Yu, Ho-Chieh Lin, John Opfer |
| 2021 | CogSci | Toward a Comprehensive Developmental Theory for Symbolic Magnitude Understanding. | Hyekyung Park, John Opfer |
| 2021 | CogSci | Cognitive Supports for Objective Numeracy. | Shuyuan Yu, John Opfer |
| 2020 | CogSci | Dynamics vs. Development in Numerosity Estimation: A Computational Model Accurately Predicts a Developmental Reversal. | Dan Kim, John Opfer |
| 2020 | CogSci | Machine Learning Optimizes Assessment: New Insights for the Development of Numerosity Estimation. | Sang Ho Lee, Dan Kim, John Opfer, Mark A. Pitt, Jay I. Myung |
| 2020 | CogSci | From Integers to Fractions: Developing a Coherent Understanding of Proportional Magnitude. | Shuyuan Yu, Dan Kim, Marta K. Mielicki, Charlies J. Fitzsimmons, Clarissa A. Thompson, John Opfer |
| 2019 | CogSci | Active Learning for a Number-Line Task with Two Design Variables. | Sang Ho Lee, Dan Kim, John Opfer, Mark A. Pitt, Jay I. Myung |
| 2018 | CogSci | Cognitive Processes in Numerosity Comparison: Theory and Data. | Dan Kim, John Opfer |
| 2018 | CogSci | Taking Whorf to School: Does Language Reform Improve Student Learning? | John Opfer, Dan Kim, Pooja Sidney, Charlies J. Fitzsimmons, Clarissa A. Thompson |
| 2018 | CogSci | Rote versus Rule: Revisiting the Role of Language in Mathematical Thinking. | Jike Qin, John Opfer |
| 2018 | CogSci | Source Retrieval Cues Facilitate Transfer in Fraction Learning. | Shuyuan Yu, John Opfer |
| 2017 | CogSci | Numerical and Non-numerical Magnitude Estimation. | Dan Kim, John Opfer |
| 2017 | CogSci | Varieties of Numerical Estimation: A Unified Framework. | Jike Qin, Dan Kim, John Opfer |
| 2016 | CogSci | A Unified Framework for Bounded and Unbounded Numerical Estimation. | Dan Kim, John Opfer |
| 2015 | CogSci | Development of Numerosity Estimation: A Linear to Logarithmic Shift? | Dan Kim, John Opfer |
| 2014 | CogSci | Mathematical Proficiency: Number Acuity vs. Numeracy. | Dan Kim, John Opfer |
| 2014 | CogSci | Numerical Estimation Under Supervision. | John Opfer, Clarissa A. Thompson |
| 2013 | CogSci | Cooperation Decreases with Development of Number Sense. | Ellen Furlong, John Opfer |
| 2013 | CogSci | Effects of numeric magnitude on the cortical valuation network. | Frank Kanayet, John Opfer, William Cunningham |
| 2011 | CogSci | Learning Linear Spatial-Numeric Associations Improves Memory for Numbers. | Clarissa A. Thompson, John Opfer |
| 2011 | CogSci | Linear Numerical Magnitude Representations Aid Memory for Single Numbers. | Christopher Young, Francesca Marciani, John Opfer |