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. Author manuscript; available in PMC: 2011 Aug 1.
Published in final edited form as: J Educ Psychol. 2010 Aug;102(3):701–711. doi: 10.1037/a0019135

Table 2.

Sample Means on Productive Vocabulary, Word Reading, and Reading Comprehension Measures by Wave, with Sample Standard Deviations in Parentheses.

English Spanish
Measure N Developmental Score Percentiles N Developmental Score Percentiles
Productive Vocabulary
        Age 4.5 144 430.2 (19.5) 11.1 (18.9) 147 424.5 (16.3) 6.1 (12.2)
        Age 5 166 436.6 (18.0) 11.5 (17.9) 166 427.1 (16.6) 5.0 (11.5)
        Age 6 154 450.1 (16.1) 15.1 (21.2) 153 431.1 (18.5) 4.8 (14.3)
        Age 7 147 462.3 (16.1) 20.8 (23.3) 146 438.3 (21.7) 6.5 (17.9)
        Age 8 144 472.0 (15.7) 25.3 (26.7) 138 459.5 (29.9) 22.9 (26.3)
        Age 11 173 490.9 (10.3) 21.8 (19.3) 173 455.4 (28.1) 5.6 (13.3)
Word Reading
        Age 4.5 144 356.5 (15.5) 30.55 (21.2) 146 353.8 (11.3) 25.9 (16.9)
        Age 5 166 364.6 (18.4) 31.39 (25.0) 166 355.9 (12.1) 19.4 (17.0)
        Age 6 154 399.8 (20.7) 44.35 (27.8) 153 375.6 (32.8) 18.7 (27.5)
        Age 7 147 437.5 (26.2) 56.71 (30.0) 146 406.0 (49.9) 28.2 (36.4)
        Age 8 144 467.6 (21.2) 58.06 (29.2) 138 431.1 (57.1) 30.6 (38.4)
        Age 11 173 500.6 (18.2) 51.18 (27.7) 173 471.7 (42.9) 29.6 (35.9)
Reading Comprehension Age 11
        WLPB-R Passage Comprehension 173 494.5 (13.7) 40.1 (22.6) n/a n/a n/a
        TORC-3 Syntactic Similarities 173 n/a 33.2 (25.4) n/a n/a n/a
        Gates MacGinitie Reading 173 474.9 (32.5) 24.4 (22.4) n/a n/a n/a
        Comprehension