Table 1.

Descriptive Statistics (Means and Standard Deviations for Each Phenotype Measure in Methods)

Measure	M	SD
WAIS-III Verbal Comprehension Index	107.38	11.78
Working Memory Predictors
Phonological Coding CTOPP Nonword Repetition	7.90	2.14
Orthographic Coding UW Expressive Orthographic	0.62	0.48
Morphological Coding UW Comes From	0.27	0.68
Syntax Coding CELF3 Formulated Sentences	10.84	2.72
Phonological Loop RAN Letters	0.04	0.99
Orthographic Loop Alphabet 15 seconds	0.09	0.74
Focused Attention D-KEFS Color Word Form Inhibition	9.26	2.81
Switching Attention RAS Letters and Numbers	0.15	1.08
Monitoring D-KEFS Repetitions Verbal Fluency Letters	9.58	2.75
Reading Outcomes
WRMT-R Letter and Word Identification	98.30	10.41
WRMT-R Word Attack	97.51	12.42
TOWRE Sight Word Efficiency	96.69	11.93
TOWRE Phonemic Decoding Efficiency	93.83	12.83
WJR Passage Comprehension	109.46	12.21
Spelling Outcomes
WIAT2 Spelling	103.48	12.34
WRAT-3 Spelling	100.41	11.19
UW Word Choice	0.52	0.17