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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speech is: they are simpler than native speaker-native speaker speech, <strong>and</strong> are not<br />
"finely tuned" to the level of the acquirer, but one sees signs of "rough tuning". To<br />
illustrate this point, I present a brief survey of the literature available to me at this<br />
time, arranged according to input features:<br />
1. Rate. This is evidence that caretaker speech is at least roughly tuned with respect<br />
to rate of speech. Broen (1972) compared rate of speech to 5- <strong>and</strong> 2-year-olds, <strong>and</strong><br />
found that younger children received slower input. Also, Cross (1977) reports a 0.36<br />
(ns) correlation between rate of input to fast acquirers <strong>and</strong> their age. On the other<br />
h<strong>and</strong>, Cross found no relation between rate of input speech <strong>and</strong> the children's<br />
linguistic competence, as measured by a test of comprehension (r = -0.12, ns).<br />
For teacher-talk, Henzl (1973), investigating the behavior of Czech speakers,<br />
concluded that teacher-talk was slower than native speaker-native speaker speech,<br />
but did not look for signs of fine tuning. Trager (1978) confirmed Henzl's findings<br />
for ESL at USC, <strong>and</strong> found some signs of tuning, with beginning ESL students<br />
receiving slower input than intermediate <strong>and</strong> advanced students. A recent study by<br />
Brunak <strong>and</strong> Scarcella (1979) confirms that interlanguage-talk is slower than native<br />
speaker speech. Also, I know of no data on foreigner-talk.<br />
2. Lexicon. Broen (1972) reports that younger children receive a lower type/token<br />
ratio, supporting at least rough tuning for age for caretaker speech. Henzl (1973)<br />
also found that teacher-talk had a lower type/token ratio than native speaker-native<br />
speaker speech but did not look for tuning. Trager (1978), in a small-scale study<br />
(two ESL acquirers <strong>and</strong> two native speakers), concluded that the less advanced ESL<br />
performer received a lower type/token ratio.<br />
3. Well formedness. Caretaker speech, according to Newport et al. (1977), is<br />
"unswervingly well formed". Newport et al., however, report that there is no<br />
evidence for tuning: caretaker speech is more well formed than adult-adult speech,<br />
but less mature children do not receive better formed input than more mature<br />
children. Cross (1977), however, reports good correlations for well formedness <strong>and</strong><br />
linguistic<br />
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