How detailed do measures of bilingual language experience need to be? A cost–benefit analysis using the Q-BEx questionnaire

• De Cat, Cécile ^[1] ; Gusnanto, Arief ^[1] ; Kašćelan, Draško ^[2] ; Prévost, Philippe ^[3] ; Serratrice, Ludovica ^[4] ; Tuller, Laurie ^[3] ; Unsworth, Sharon ^[5]
  1. [1] University of Leeds
  2. [2] University of Essex
  3. [3] University of Tours
  4. [4] University of Reading
  5. [5] Radboud University

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• Localización: Bilingualism: Language and cognition, ISSN 1366-7289, Vol. 29, Nº 4, 2026, págs. 928-939
• Idioma: inglés
• DOI: 10.1017/s1366728925100497
• Texto completo no disponible (Saber más ...)
• Resumen

  • What is the optimal level of questionnaire detail required to measure bilingual language experience? This empirical evaluation compares alternative measures of language exposure of varying cost (i.e., questionnaire detail) in terms of their performance as predictors of oral language outcomes. The alternative measures were derived from Q-BEx questionnaire data collected from a diverse sample of 121 heritage bilinguals (5–9 years of age) growing up in France, the Netherlands and the UK. Outcome data consisted of morphosyntax and vocabulary measures (in the societal language) and parental estimates of oral proficiency (in the heritage language). Statistical modelling exploited information-theoretic and cross-validation approaches to identify the optimal language exposure measure. Optimal cost–benefit was achieved with cumulative exposure (for the societal language) and current exposure in the home (for the heritage language). The greatest level of questionnaire detail did not yield more reliable predictors of language outcomes.

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