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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Table 1. Studies analyzing grammatical morphemes in obligatory<br />
occasions<br />
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I. Child L1 acquisition<br />
A. Individual cross-sectional: none.<br />
B. Individual longitudinal: Brown, 1973 (Adam, Eve, Sarah);<br />
Curtiss, Fromkin, <strong>and</strong> <strong>Krashen</strong>, 1978 (Genie).<br />
C. Grouped cross-sectional: de Villiers <strong>and</strong> de Villiers, 1973;<br />
Kessler, 1975.<br />
D. Grouped longitudinal: Brown, 1973<br />
II. Child L2 acquisition<br />
A. Individual cross-sectional: Kessler <strong>and</strong> Idar, 1977 (Than,<br />
three cross-sections); Rosansky, 1976 (Jorge, ten cross-sections,<br />
Marta, Cheo, Juan).<br />
B. Individual longitudinal: Rosansky, 1976 (Jorge); Hakuta, 1974<br />
(Uguisu); Kessler <strong>and</strong> Idar, 1977 (Than).<br />
C. Grouped cross-sectional: Dulay <strong>and</strong> Burt, 1973; Dulay <strong>and</strong> Burt,<br />
1974a.<br />
III. Adult L2 acquisition<br />
A. Individual cross-sectional: Birnbaum, 1976 (Hector);<br />
Strei, 1976 (Gerardo); Holdich, 1976 (Holdich);<br />
Rosansky, 1976 (Alberto, Dolores).<br />
B. Individual longitudinal: none<br />
C. Grouped cross-sectional: Bailey, Madden, <strong>and</strong> <strong>Krashen</strong>, 1974;<br />
Larsen-Freeman, 1975; <strong>Krashen</strong>, Houck, Giunchi, Bode, Birnbaum,<br />
<strong>and</strong> Strei, 1977; Andersen 1976; Birnbaum, Butler, <strong>and</strong> <strong>Krashen</strong>,<br />
1977 (also in <strong>Krashen</strong>, Butler, Birnbaum, <strong>and</strong> Robertson, 1978).<br />
IV. Agrammatics<br />
A. Individual cross-sectional: de Villiers, 1974 (A3, 50, 14, 5,<br />
24, 6, 43 (two cross-sections)).<br />
B. Individual longitudinal: none.<br />
C. Grouped cross-sectional: de Villiers, 1974.<br />
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variation; just one additional correct response, for example, could change a subject's score on a morpheme by<br />
10 percentage points. Nevertheless, I found an amazing amount of uniformity across all studies that used<br />
Monitor-free instruments, that is, in all studies where language was used for communication. (Rosansky<br />
(1976), it should be noted, allowed items to be analyzed that appeared in less than ten obligatory occasions for<br />
an individual cross-section. This probably accounts for our different conclusions, which are based on some of<br />
the same data.)<br />
Table 2 lists the particular relations discovered <strong>and</strong> describes the criteria for selection. The counterexamples to<br />
these generalizations (Table 3) are rarely "serious". As Table 3 indicates, they often fall within 10 percentage<br />
points, are items represented by less than twenty obligatory occasions, or are within one or two ranks where<br />
percentages<br />
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