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II. RECRUITMENT OF THE FAMILY LIFE PROJECT SAMPLE.

Willoughby, Michael; Burchinal, Margaret; Garrett-Peters, Patricia; Mills-Koonce, Roger; Vernon-Feagans, Lynne; Cox, Martha.
Monographs of the Society for Research in Child Development. , 78 (5): 24-35 (2013)

DOI: 10.1111/mono.12048. Information about DOI

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The FLP investigators planned a complex sampling design for this project in 2002 and began recruiting infants into the study a year later. This chapter describes the process of (1) identifying the rural counties that were selected for the study, and (2) the procedures that were used to recruit this sample to be representative of every baby born to a mother who resided in one of these six counties over a 1-year period, oversampling for poverty and, in North Carolina, race (i.e., African American). We used a fairly broad definition of rural (described below) that included counties that could not be considered urban or suburban but were more typical of places where there were small- to medium-sized towns with little access to large metropolitan areas and the resources those areas might provide. Rather than recruiting a sample of convenience or a subpopulation with certain characteristics of interest, we adopted a developmental epidemiologically informed design. This sampling procedure ensured that we had a sufficiently large number of low-income families to test complex questions related to poverty while maintaining the ability to make inferences back to the broader population of infants and families who resided in our target counties, as if all participants had been selected by simple random sampling.

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