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. Author manuscript; available in PMC: 2020 Nov 4.
Published in final edited form as: New Dir Child Adolesc Dev. 2019 Jul 1;2019(166):43–77. doi: 10.1002/cad.20305

Table 3.1.

Participant, Reading, and Language Sample Descriptive Statistics

K-Fall K-Spring 1st-Fall lst-Spring 2nd-Fall 2nd-Spring
Participants 685 732 954 975 1,205 1,233
Boys; Girls 332; 353 353; 379 475; 479 489; 486 605; 600 620; 613
Instructed: E; Instructed: S 222; 463 229; 503 289; 665 299; 676 384; 821 392; 841
WLPB-Rw: Total observations 0 0 1,816 1,930 2,355 2,447
NEnglish; NSpanish 0; 0 0; 0 904; 912 975; 955 1,193; 1,162 1,232; 1,215
 WLPB-Rw: BRE 419.9 (27.2) 447.6 (26.7) 460.7 (21.6) 472.7 (20.3)
 Percent at risk–BRE 11.3% 12.8% 14.8% 15.1%
 WLPB-Rw: BRS 437.6 (42.9) 466.1 (38.8) 472.4 (34.3) 478.8 (35.2)
 Percent at risk–BRS 16.8% 17.3% 19% 20.7%
LSA: Total samples 996 1,187 1,649 1,782 2,227 2,326
NEnglish; NSpanish 402; 594 547; 640 786; 863 879; 903 1,118; 1,109 1,181; 1,145
 MLUw: E 5.6 (1.2) 6.6 (1.2) 6.3 (1.1) 7 (1) 6.8 (0.8) 7.9 (1.1)
 NDW: E 55 (22.2) 67.5 (23.9) 74 (27.5) 75.4 (23.1) 82.2 (22.4) 100.3 (23.2)
 WPM: E 68.5 (24.1) 70.9 (25.3) 74.4 (25.5) 79.3 (23.3) 88.1 (24) 93.4 (22.7)
 MLUw: S 4.7 (0.9) 5.7 (1) 5.6 (0.8) 6 (0.9) 5.8 (0.9) 7 (1.1)
 NDW: S 54.5 (19.6) 71.6 (20.2) 80.8 (23.1) 75.9 (19.1) 79.3 (18.5) 91.6 (19.8)
 WPM: S 55.9 (20.4) 63.4 (21) 65.8 (20.5) 65.3 (19.7) 66.7 (20.6) 81.5 (21.6)

Note. K = kindergarten; 1st = Grade 1; 2nd = Grade 2; E = English; S = Spanish; WLPB-Rw = Woodcock Language Proficiency Battery-Revised, W-score (Woodcock, 1991; Woodcock & Muñoz-Sandoval, 1995); NEnglish = total number of observations/samples in English; NSpanish = total number of observations/samples in Spanish; BRE = broad reading cluster in English; Percent at risk–BRE: Percentage of students with W-score performance at or below the 20th percentile at the end (spring semester) of Grade 2 in the BRE; BRS = broad reading cluster in Spanish; Percent at risk–BRS: Percentage of students with W-score performance at or below the 20th percentile at the end (spring semester) of Grade 2 in the BRS; LSA = language sample analysis; MLUw = mean length of utterance in words; NDW = number of different words; WPM = words per minute; standard deviations appear in parentheses.