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Critical Period Hypothesis

Critical Period Hypothesis. “-- the optimal time to learn a second language is between age three and five or as soon thereafter as possible, and certainly before the onset of puberty.” -- Rosalie Porter. Theoretical Components of a Critical Period?. Beginning and end points of the period.

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Critical Period Hypothesis

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  1. Critical Period Hypothesis “-- the optimal time to learn a second language is between age three and five or as soon thereafter as possible, and certainly before the onset of puberty.” -- Rosalie Porter

  2. Theoretical Components of a Critical Period? • Beginning and end points of the period. • Qualitative difference inside and outside the period. • Discontinuity at the end of the period. • Robust to environmental variation inside the period.

  3. Johnson & Newport (1989) Critical period effects in second-language learning: The influence of maturational state on the acquisition of English as a second language. Cognitive Psychology, 21, 60-99. r=-.87 r=-.16

  4. Johnson & Newport, combined across age groups.

  5. What Kind of Theory is SES?

  6. Hart & Risley

  7. Hierarchical Structure of Language:Lenneberg’s Plan

  8. Figure 12. English development as a function of school poverty status. District A.

  9. Parent Education Beyond High School High School or GED Some High School < High School Figure 13. Norm-referenced English scores by parent educational level, District B.LEP student mean age equivalent score is represented by the colored portions of the bar; the white unshaded portion shows the expected age-equivalent for the norming population.

  10. Parent Education Beyond High School High School or GED Some High School < High School Figure 16. Norm-referenced English writing scores by parent educational level, District B.LEP student mean age equivalent score is represented by the colored portions of the bar; the white unshaded portion shows the expected age-equivalent for the norming population.

  11. Parent Education Beyond High School High School or GED Some High School < High School Figure 13. Norm-referenced English scores by parent educational level, District B.LEP student mean age equivalent score is represented by the colored portions of the bar; the white unshaded portion shows the expected age-equivalent for the norming population.

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