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. 2013 Sep 20;4:648. doi: 10.3389/fpsyg.2013.00648

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Copyright © 2013 Perone and Spencer.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Panels (A–D) show empirical results from the processing speed task reported by Rose et al. (2002) for term (left) and preterm (right) infants at 5 (blue), 7 (red), and 12 (black) months of age. With age, term and preterm infants exhibited fewer trials to criterion (A), accumulated less time looking to the familiar (B), higher shift rates (C), and shorter look durations (D). Preterm infants' behavior at every age resembled that of younger, term infants. Panels (E–H) show results from the DNF model in the processing speed task for the term (left), preterm (middle), and intervention (right) models. The DNF model exhibited a similar pattern of results for the term and preterm infant models. The intervention model showed performance that resembled the term model by 12 months of age.