Shared intentionality theory posits that at age 3, children expand their conception of plural agency to include 3- or more-person groups. We sought to determine whether this conceptual shift is detectable in children's pronoun use. We report the results of a series of Bayesian hierarchical generative models fitted to 479 English-speaking…

Using latent class analysis (LCA), this study identified a dyadic taxonomy of delinquent youth categorized by varying types of maternal-youth reporting discrepancies (i.e., youth < maternal, youth > maternal) within a sample of 764 14-year-old high-risk youth. Four distinctive subgroups of youth were identified, two of which reported more…

The phonetic characteristics of canonical babbling produced by Korean- and English-learning infants were compared with consonant and vowel frequencies observed in infant-directed speech produced by Korean- and English-speaking mothers. For infant output, babbling samples from six Korean-learning infants were compared with an existing English…

Purpose: Postpartum depression (PPD) is a significant public health problem, with significant consequences for the mother, infant, and family. Available research has not adequately examined the potential impact of sociodemographic characteristics, such as place of residence, on risk for PPD. Therefore, this systematic review and meta-analysis…

Mothers' spontaneous teaching of their 4-year-olds was observed during block play in 230 dyads from low-income African American, Mexican, Dominican, and Chinese backgrounds. Blocks contained graphics that could be used to teach concepts in literacy, math, construction, or body/color. Coders noted how often mothers taught each of the concepts,…

This study compared some of the survey data collected by the Pregnancy Risk Assessment Monitoring System (PRAMS) to information from vital records and administrative records in the First Steps Database (FSDB) for a group of women who gave birth in 1993. PRAMS is an ongoing survey of Washington women who have given birth. The FSDB contains birth…

This research was designed to serve two major purposes: (1) to create a substantial library of theoretically neutral observational data as permanent documentation of actual life experiences in the lives of 3-year-old children from different socioeconomic backgrounds and (2) to analyze specimen records in order (a) to describe and quantify the…