title: Parent Reports of Young Spanish-English Bilingual Children's Productive Vocabulary: A Development and Validation Study.
abstract: OBJECTIVE
  This 2-phase study aims to extend research on parent report measures of children's productive vocabulary by investigating the development (n = 38) of the Spanish Vocabulary Extension and validity (n = 194) of the 100-item Spanish and English MacArthur-Bates Communicative Development Inventories Toddler Short Forms and Upward Extension (Fenson et al., 2000, 2007; Jackson-Maldonado, Marchman, & Fernald, 2013) and the Spanish Vocabulary Extension for use with parents from low-income homes and their 24- to 48-month-old Spanish-English bilingual children.
  
  
  METHODS
  Study participants were drawn from Early Head Start and Head Start collaborative programs in the Northeastern United States in which English was the primary language used in the classroom. All families reported Spanish or Spanish-English as their home language(s). The MacArthur Communicative Development Inventories as well as the researcher-designed Spanish Vocabulary Extension were used as measures of children's English and Spanish productive vocabularies.
  
  
  RESULTS
  Findings revealed the forms' concurrent and discriminant validity, on the basis of standardized measures of vocabulary, as measures of productive vocabulary for this growing bilingual population.
  
  
  CONCLUSIONS
  These findings suggest that parent reports, including our researcher-designed form, represent a valid, cost-effective mechanism for vocabulary monitoring purposes in early childhood education settings.
authors.forename: Jeannette
authors.initials: J
authors.lastname: Mancilla-Martinez
authors.forename: Perla B
authors.initials: PB
authors.lastname: Gámez
authors.forename: Shaher Banu
authors.initials: SB
authors.lastname: Vagh
authors.forename: Nonie K
authors.initials: NK
authors.lastname: Lesaux
mesh_terms: D002648:Child; D002663:Child Language; D002675:Child, Preschool; D003142:Communication; D018479:Early Intervention, Educational; D005260:Female; D006630:Hispanic or Latino / Q000193:education; D006801:Humans; D007807:Language Tests; D008297:Male; D019303:Multilingualism; D010290:Parents; D015203:Reproducibility of Results; D014481:United States; D014825:Vocabulary