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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development (r = 0.56, p < 0.05). This difference may be due to sample differences;<br />
Cross' sample consisted of children known to be rapid acquirers.<br />
Henzl (1973) reports that teacher-talk is better formed than native speaker-native<br />
speaker speech. This was confirmed by Wiley (1978), who also found some signs of<br />
tuning: her beginning ESL students heard fewer disfluencies than did intermediate<br />
<strong>and</strong> advanced students. Freed (1980) reported that in her study of Americans talking<br />
to ESL performers, foreigner-talk appeared to be about as well formed as caretaker<br />
speech (compared to Newport, 1976). There are no data for interlanguage-talk,<br />
which is probably not as well formed as native speaker-native speaker speech.<br />
4. Length. Caretaker speech is shorter than adult-adult speech but, as Newport et al.<br />
point out, this does not necessarily mean simpler. As seen in Table 1, Cross (1977)<br />
finds evidence for at least rough tuning, but Newport et al. do not. As mentioned<br />
above, this may be due to sample differences. Henzl confirms that teacher-talk is<br />
shorter than native speaker-native speaker speech, but did not search for tuning.<br />
Again, there are no data for interlanguage-talk <strong>and</strong> foreigner-talk.<br />
5. Propositional complexity. As seen in Table 1, there is some evidence for rough<br />
tuning in caretaker speech for this feature: there are generally positive correlations<br />
(but not usually significant) between the number of S nodes per utterance in the<br />
input <strong>and</strong> the child's linguistic maturity, again with higher correlations found in<br />
Cross' study. Trager (1978) used this measure for input to second language<br />
acquirers, finding again that teacher-talk is less complex than native speaker-native<br />
speaker talk, <strong>and</strong> also that beginners received somewhat less complex input than<br />
intermediate <strong>and</strong> advanced students.<br />
Other scholars have used other measures. Both Gaies (1977) <strong>and</strong> Wiley (1978) used<br />
T-unit-based measures, such as words per T-unit <strong>and</strong> clauses per T-unit. Briefly,<br />
both studies agree that teacher-talk is simpler than native speaker-native speaker<br />
speech. Gaies, however, found evidence for tuning by level, his beginners receiving<br />
simpler input than his intermediates, <strong>and</strong> his intermediates receiving simpler input<br />
than his advanced ESL students. Wiley, with a slightly smaller sample, did not find<br />
evidence for tuning by level. Henzl also reports less subordination in teacher-talk.<br />
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