Appendix B.

The Means (and Standard Deviations) for the SLI, NLI, and TD Groups on Performance IQ, and the Language Composites. The Language Composite Values are z Scores.

SLI Group (N = 47, Age at Testing M = 13.93 years, SD = 0.43)
Performance	Grammar	Vocabulary	Discourse	Receptive	Expressive
IQ	Composite	Composite	Composite	Composite	Composite
97.83 (9.26)	−1.66 (0.77)	−1.22 (0.57)	−0.99 (0.45)	−1.34 (0.55)	−1.57 (0.58)
NLI Group (N = 25, Age at Testing M = 13.97 years, SD = 0.39)
Performance	Grammar	Vocabulary	Discourse	Receptive	Expressive
IQ	Composite	Composite	Composite	Composite	Composite
76.48 (5.33)	−1.91 (1.07)	−1.48 (0.56)	−1.16 (0.45)	−1.79 (0.76)	−1.62 (0.64)
TD Group (N = 106, Age at Testing M = 13.88 years, SD = 0.38)
Performance	Grammar	Vocabulary	Discourse	Receptive	Expressive
IQ	Composite	Composite	Composite	Composite	Composite
101.79 (9.92)	−0.13 (0.69)	−0.23 (0.86)	−0.13 (0.91)	−0.13 (0.77)	−0.23 (0.80)