Second Language Acquisition and Second ... - Stephen Krashen
Second Language Acquisition and Second ... - Stephen Krashen
Second Language Acquisition and Second ... - Stephen Krashen
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Notes<br />
1 This schema leaves two unresolved problems. First, Molfese (1976) reports no change in degree of<br />
AER asymmetry with age for his infant subjects. This may not conflict with the hypothesis that<br />
lateralization develops with age; measured laterality in the infant brain may relate quite differently<br />
to "true" underlying laterality (see <strong>Krashen</strong>, 1975c, for detailed discussion). Another possible<br />
problem is Lenneberg's observation that recovery from aphasia is better for those injured before<br />
puberty, a finding that seems to imply right hemisphere participation in the language function until<br />
that age. Here there are two possibilities: first, recovery need not involve the right hemisphere but<br />
may be due to undamaged tissue on the left side assuming the language function (see, for example,<br />
Roberts, 1958). <strong>Second</strong>, if it is indeed the right hemisphere that is responsible for this superiority in<br />
recovery, perhaps those late-lateralized aspects of language posited in the text play some role.<br />
2 A very recent study conducted by my associates Linda Galloway <strong>and</strong> Robin Scarcella, unpublished<br />
at the time of this writing, suggests that early second language acquisition may be just as left<br />
hemisphere lateralized as first language. Galloway <strong>and</strong> Scarcella administered dichotic stimuli<br />
(words in English <strong>and</strong> Spanish) to "informal" beginning adult acquirers of English as a second<br />
language. These performers were "picking up" English without the benefit of formal instruction <strong>and</strong>,<br />
presumably, without using conscious learning. Galloway <strong>and</strong> Scarcella found no significant<br />
difference in ear advantage for the first language (Spanish) <strong>and</strong> the second language (English), with<br />
both English <strong>and</strong> Spanish stimuli yielding a right-ear advantage.<br />
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