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. Author manuscript; available in PMC: 2012 Jul 16.
Published in final edited form as: J Speech Lang Hear Res. 2010 Jul 19;53(5):1307–1320. doi: 10.1044/1092-4388(2010/09-0016)

Table 3.

Participant characteristics: Group means.

Group Age
(months)		 AAE
ratinga 		Leiter–Rb TOLD–P:3c PPVT–IIId MLUm Maternal
educatione
SLI 77.50 (4.77) 5.20 (0.74) 20.60 (3.03) 66.10 (8.49) 78.00 (4.90) 5.09 (0.89) 12.22 (1.92)
AM 74.60 (3.13) 4.50 (1.00) 22.50 (3.89) 98.90 (7.59) 100.00 (7.82) 6.49 (0.90) 14.70 (1.57)
LM 55.80 (4.05) 4.73 (1.09) 22.90 (5.71) 99.10 (6.35) 100.40 (7.95) 5.13 (1.14) 14.10 (2.38)

Note. Numbers in parentheses are standard deviations. MLUm = mean length of utterance in morphemes; AM = age-matched control group; LM = language-matched control group.

a

African American English (AAE) rating: average ratings from three listeners (range: 1 = no use of AAE, 7 = heavy use of AAE).

b

Total scaled scores from the Figure Ground and Form Completion subtests of the Leiter International Performance Scale—Revised (normative M = 20, SD = 6).

c

Syntax quotient of the Test of Language Development—Primary, Third Edition (normative M = 100, SD = 15).

d

Standard score from the Peabody Picture Vocabulary Test—III (normative M = 100, SD = 15).

e

Maternal education level: highest grade completed (12 = high school graduate, 16 = college graduate).