This issue brief presents findings from the Universal Preschool Child Outcomes Study, which examined a diverse group of Los Angeles preschoolers. The study integrated three strategies—card sorts, focus groups, and cognitive interviewing—to measure how parents rate their...

This article presents findings from a randomized controlled trial of 1,279 healthy newborns in Ulaanbaatar, Mongolia, on the effects of swaddling—the tight, prolonged binding of infants—on development.

A Mathematica team led by Emily Dwoyer, Kathy Sonnenfeld, and Susan Sprachman provided the data collection services for this study of the Experience Corps (EC) initiative, a program that brings older adults ages 55 and up into public elementary schools to tutor and mentor children who are at...