A solution to the measurement problem in the Idiographic Approach using Computer Adaptive Practicing

Hofman, A.D. and Jansen, B.R.J. and De Mooij, Susanne and Stevenson, C.E. and Van der Maas, H.L.J. (2018) A solution to the measurement problem in the Idiographic Approach using Computer Adaptive Practicing. Journal of Intelligence 6 (1), ISSN 2079-3200.

Abstract

Molenaar's manifesto on psychology as idiographic science (Molenaar, 2004) brought the N = 1 times series perspective firmly to the attention of developmental scientists. The rich intraindividual variation in complex developmental processes requires the study of these processes at the level of the individual. Yet, the idiographic approach is all but easy in practical research. One major limitation is the collection of short interval times series of high quality data on developmental processes. In this paper, we present a novel measurement approach to this problem. We developed an online practice and monitoring system which is now used by thousands of Dutch primary school children on a daily or weekly basis, providing a new window on cognitive development. We will introduce the origin of this new instrument, called Math Garden, explain its setup, and present and discuss ways to analyze children's individual developmental pathways.

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