 Measuring Developmental Differences With an Age-of-Attainment MethodWarren O. Eaton, Jennifer L. Bodnarchuk and Nancy A. McKeen SAGE Open, 2014, vol. 4, issue 2, 2158244014529775 Abstract: The sensitive measurement of variation in rate of attainment is an underutilized but useful indicator of individual differences in development. To assess such individuality, we used longitudinal parental diary checklists of infant attainments to estimate the ages at which ubiquitous developmental milestones like sitting and walking were reached. Parents using this diary checklist have been shown to be valid reporters of milestone attainments. Present analyses show that multiple definitions of milestone onset have high reliability as well. Babies differ considerably in their rates of development, and such individual differences in rates may be predicted from other variables with survival (event history) analysis. Ages of attainment for sustained sitting, crawling, and walking were calculated for 519 infants and predicted using 11 common covariates. Our discovery that babies of younger mothers reach these milestones sooner than those of older mothers reveals the value of an age-of-attainment (AOA) approach. A framework with a SAS program for collecting and analyzing AOA data is presented. Keywords: parent diary; rate of development; developmental tempo; developmental timing; mother age; gestational age; infancy (search for similar items in EconPapers) Downloads: (external link) Related works: Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text Persistent link: https://EconPapers.repec.org/RePEc:sae:sagope:v:4:y:2014:i:2:p:2158244014529775 Access Statistics for this article More articles in SAGE Open |
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