Jan Vanhove
The Critical Period Hypothesis in Second Language Acquisition: A Statistical Critique and a Reanalysis
University of Fribourg
second language acquisition research critical period hypothesis cph holds function learners age susceptibility second language input nonlinear paper revisits indistinctness found literature regard hypothesiss scope predictions even scope clearly delineated predictions spelt however empirical studieswith exceptionsuse analytical statistical tools irrelevant respect predictions made paper discusses statistical fallacies common cph research illustrates alternative analytical method piecewise regression means reanalysis two datasets 2010 paper purporting found crosslinguistic evidence favour cph reanalysis reveals specific age patterns predicted cph crosslinguistically robust applying principle parsimony concluded age patterns second language acquisition governed critical period conclude paper highlights role confirmation bias scientific enterprise appeals second language acquisition researchers reanalyse old datasets using methods discussed paper data r commands used reanalysis provided supplementary materials