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EYT Card Sorting

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Early Years Toolbox (EYT) Card Sorting is an iPad-based assessment of pre-school and early primary school students' cognitive flexibility (i.e., ability to disengage from one task/rule and re-engage in another). In this game, children are presented with rabbits and boats that vary along two dimensions (i.e., shape and colour). Children and are asked to sort each the rabbits and boats first by one dimension (e.g., colour) and then, after a number of trials, by another dimension (e.g., shape). This game takes approximately 5 minutes to complete.

Scores are presented on the final assessment screen. For more precise research applications, there are options to have the item by item data sent to a user-specified e-mail address or database. For more information, brief EYT training videos, and analysis resources, please visit

Languages embedded: English, Afrikaans, Xhosa, Sotho, Zulu, and more in progress

About the Early Years Toolbox:

The 'Early Years Toolbox' (EYT, for short) is comprised of six brief, engaging game-like assessments of young children’s self-regulation, executive functioning and vocabulary. These assessments are based on well-established and widely used measures for young children (e.g., go/no-go, dimensional change card sort), yet have been adapted and optimised on the basis of 20+ years of research experience with this age group.

NOTE FOR RESEARCHERS. If using this app for research and/or publication purposes, please cite the following as the original source articles (please feel free to contact us for copies of these articles):

Howard, S. J., & Okely, T. (2015). Catching fish and avoiding sharks: Investigating factors that influence developmentally appropriate measurement of preschoolers’ inhibitory control. Journal of Psychoeducational Assessment, 33(6), 585-596.

Howard, S. J., & Melhuish, E. (2015). An Early Years Toolbox (EYT) for assessing early executive function, language, self-regulation, and social development: Validity, reliability and preliminary norms. Manuscript accepted for publication in Journal of Psychoeducational Assessment.