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Three- and 4-year-olds encode modeled actions in two ways leading to immediate imitation and delayed emulation (2011)
Journal Article
Simpson, A., & Riggs, K. J. (2011). Three- and 4-year-olds encode modeled actions in two ways leading to immediate imitation and delayed emulation. Developmental Psychology, 47(3), (834-840). doi:10.1037/a0023270. ISSN 0012-1649

When copying a model's behavior with a tool, children tend to imitate (copy the specific actions to replicate the model's goal) rather than emulate (bring about the model's goal in the most efficient way). Tasks producing these findings test children... Read More

Refining the understanding of inhibitory processes: how response prepotency is created and overcome (2011)
Journal Article
Simpson, A., Riggs, K., Beck, S. R., Gorniak, S. L., Wu, Y., Abbott, D., & Diamond, A. (2012). Refining the understanding of inhibitory processes: how response prepotency is created and overcome. Developmental Science, 15(1), 62-73. doi:10.1111/j.1467-7687.2011.01105.x

Understanding (a) how responses become prepotent provides insights into when inhibition is needed in everyday life. Understanding (b) how response prepotency is overcome provides insights for helping children develop strategies for overcoming such te... Read More

Under what conditions do children have difficulty in inhibiting imitation? Evidence for the importance of planning specific responses (2011)
Journal Article
Simpson, A., & Riggs, K. J. (2011). Under what conditions do children have difficulty in inhibiting imitation? Evidence for the importance of planning specific responses. Journal of experimental child psychology, 109(4), 512-524. https://doi.org/10.1016/j.jecp.2011.02.015

The response set effect has been observed in a number of developmental tasks that are proposed to required inhibition. This effect has been interpreted as evidence that the specific responses children plan to make in these tasks become prepotent. Her... Read More

The development of visual short-term memory for multifeature items during middle childhood (2011)
Journal Article
Riggs, K. J., Simpson, A., & Potts, T. (2011). The development of visual short-term memory for multifeature items during middle childhood. Journal of experimental child psychology, 108(4), (802-809). doi:10.1016/j.jecp.2010.11.006. ISSN 0022-0965

Visual short-term memory (VSTM) research suggests that the adult capacity is limited to three or four multifeature object representations. Despite evidence supporting a developmental increase in capacity, it remains unclear what the unit of capacity... Read More