Sex differences in language competence of 4-year-old children: Female advantages are mediated by phonological short-term memory

For some time now, psycholinguistic research has involved the study of sex differences in language development. Overall, girls seem to have an early advantage over boys, mainly in regard to vocabulary, which appears to decrease and, eventually, vanish with age. While there are numerous studies on sex differences in the acquisition of vocabulary as well as grammar, early sex differences in phonological short-term memory (PSTM) have been mostly...