Numerosity Discrimination Task

Numerosity discrimination task that measures the ability to estimate the quantity of large groups of non-symbolic items and judge whether it represents a "small" or "large" number.

Procedure adapted from:

• Ratcliff, R., Thapar, A., & Mckoon, G. (2010). Individual differences, aging, and IQ in two-choice tasks. Cognitive Psychology, 60(3), 127-157.
• Ratcliff, R., Love, J., Thompson, C. A., & Opfer, J. E. (2012). Children are not like older adults: A diffusion model analysis of developmental changes in speeded responses. Child Development, 83(1), 367-381.

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