The predictive value of developmental assessments at 1 and 2 for intelligence quotients at 6

Jessica B. Girault, Benjamin W. Langworthy, Barbara D. Goldman, Rebecca L. Stephens, Emil Cornea, J. Steven Reznick, Jason Fine and John H. Gilmore

Intelligence, 2018, vol. 68, issue C, 58-65

Abstract: Intelligence is an important individual difference factor related to mental health, academic achievement, and life success, yet there is a lack of research into its early cognitive predictors. This study investigated the predictive value of infant developmental assessment scores for school-age intelligence in a large, heterogeneous sample of single- and twin-born subjects (N = 521). We found that Early Learning Composite (ELC) scores from the Mullen Scales of Early Learning have similar predictive power to that of other infant tests. ELC scores at age 2 were predictive of Stanford-Binet abbreviated intelligence (ABIQ) scores at age 6 (r = 0.46) even after controlling for sex, gestation number, and parental education. ELC scores at age 1 were less predictive of 6-year ABIQ scores (r = 0.17). When the sample was split to test robustness of findings, we found that results from the full sample replicated in a subset of children born at ≥32 weeks gestation without birth complications (n = 405), though infant cognitive scores did not predict IQ in a subset born very prematurely or with birth complications (n = 116). Scores at age 2 in twins and singletons showed similar predictive ability for scores at age 6, though twins had particularly high correlations between ELC at age 1 and ABIQ at age 6.

Date: 2018
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Persistent link: https://EconPapers.repec.org/RePEc:eee:intell:v:68:y:2018:i:c:p:58-65

DOI: 10.1016/j.intell.2018.03.003

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