Table 3.

Psycholinguistic indices of language impairment.

Measure	SLI (n = 19)		ADHD+LI (n = 19)		TD (n = 19)		F(2, 54)	Partial η2	Contrast
	M (SD)	Range	M (SD)	Range	M (SD)	Range
Nonword repetitiona	79.1 (9.2)	54.2–90	81.1 (8.6)	66–97.9	89.6 (6.7)	69.8–97.9	8.71**	.244	SLI = ADHD+LI < TD
Sentence recallb	11.7 (6.9)	0–26	14.7 (7.3)	1–27	24.4 (4.1)	15–31	21.3***	.441	SLI = ADHD+LI < TD
TEGI
Third person presentc	84.9 (24.1)	0–100	91.0 (16.1)	33–100	99.4 (2.5)	89–100	3.6*	.117	SLI = ADHD+LI < TD
Regular pastd	77.4 (29.7)	0–100	84.63 (16.8)	40–100	97.0 (4.7)	90–100	4.7*	.147	SLI = ADHD+LI < TD
Irregular finitee	79.4 (27.4)	0–100	89.53 (14.5)	63–100	99.4 (2.8)	88–100	5.9**	.179	SLI = ADHD+LI < TD
Irregular correctf	49.5 (19.7)	0–75	42.9 (28.4)	0–100	83.9 (23.3)	25–100	15.9***	.370	SLI = ADHD+LI < TD

Note. SLI = specific language impairment; ADHD = attention-deficit/hyperactivity disorder; TD = typical development; LI = language impairment; TEGI = Test of Early Grammatical Impairment (Rice & Wexler, 2001).

^aPercentage of phonemes correctly produced (Dollaghan & Campbell, 1998).

^bMaximum score = 32 (Redmond, 2005).

^cPresent tense probe (percentage of correct use of –s tense inflection in obligatory contexts).

^dRegular past tense score from past tense probe (percentage of correct use of –ed tense inflection in obligatory contexts).

^eIrregular finite score from past tense probe (percentage of use of correct [e.g., “he wrote on the chalkboard”] and overregularized irregular forms [e.g., “he writed on the chalkboard”] in obligatory contexts).

^fIrregular correct score from past tense probe (percentage of correct use of irregular forms in obligatory contexts).

^*p < .05.

^**p < .01.

^***p < .001.