critical period hypothesis

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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. - PowerPoint PPT Presentation

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-- 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 PorterCritical Period Hypothesis1Theoretical 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.

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=-.87r=-.16Johnson & Newport, combined across age groups.

What Kind of Theory is SES?

Hart & Risley

Hierarchical Structure of Language:Lennebergs Plan

Figure 12. English development as a function of school poverty status. District A.11Figure 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.< High SchoolSome High SchoolHigh School or GEDBeyond High SchoolParent Education

12Figure 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.< High SchoolSome High SchoolHigh School or GEDBeyond High SchoolParent Education

13Figure 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.< High SchoolSome High SchoolHigh School or GEDBeyond High SchoolParent Education

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