Descriptive statistics for the WBS patient cohorts and for the atypical partial deletion cases (WBS425 and WBS023I).

Note: Mean (standard deviation) and range are reported for chronological age, IQ, and Socio-Economic Status. Chronological age and mental age are in years. Mean (standard deviation) are provided for WJ-R COG Factor Scores. Standard scores are represented. Standard scores have a mean of 100 and a standard deviation of 15. Scores below 80 are impaired compared to typically developing chronological age matched controls.