Outliers: The Story of Success · chapter 4 · id outliers-c4-05-annette-lareaus-unequal-childh

“Annette Lareau's Unequal Childhoods study observed 88 families but discussed only 12 in detail -- a qualitative sample too small for statistical generalization, though subsequent quantitative studies have found modest support for the concerted cultivation framework.”

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Wikipedia: Unequal Childhoodssource alive
The study was based upon 88 African American and white families, of which only 12 were discussed in detail.
Cheadle (2008), Social Science Research: Concerted cultivation and unequal achievement in elementary schoolpaywalled — manual check queued
Parental socioeconomic status is positively and strongly associated with concerted cultivation, and concerted cultivation is positively associated with achievement measures, but the portion attributable to concerted cultivation is modest in size.

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