Table 1 Sample characteristics
|  | Age-matched N = 12 | FXS N = 11 | Cog-matched N = 12 |
|---|---|---|---|
Age, mean in months (SD) | 47.6 (13.1) | 53.5 (16.3) | 29.8 (10.1) |
Maternal education, n (%) | |||
 < 4-year college degree | 0 (0) | 0 (0) | 1 (8) |
 4-year college degree | 4 (33) | 2 (18) | 2 (17) |
 > 4-year college degree | 8(77) | 9 (81) | 9 (75) |
Paternal Education, n (%) | |||
 < 4-year college degree | 0 (0) | 1 (9) | 3 (25) |
 4-year college degree | 6 (50) | 4 (36) | 6 (50) |
 > 4-year college degree | 6 (50) | 6 (54) | 3 (25) |
Household income, n (%) | |||
 < $40,000 | 0 (0) | 0 (0) | 1 (8) |
 $40–70,000 | 0 (0) | 3 (27) | 0 (0) |
 $70–100,000 | 3 (25) | 3 (27) | 0 (0) |
 $100–140,000 | 5 (42) | 1 (8) | 4 (33) |
 > $140,000 | 4 (33) | 4 (36) | 7 (58) |
Race, n (%) | |||
 White | 7 (58) | 9 (81) | 9 (75) |
 African American | 0 (0) | 0 (0) | 1 (8) |
 Asian | 1 (8) | 1 (9) | 0 (0) |
 Mixed | 4 (33) | 1 (9) | 2 (17) |
Ethnicity, n (%) | |||
 Hispanic or Latino | 0 (0) | 3 (27) | 1 (8) |
Mullen Scales of Early Learning | |||
 Nonverbal Developmental Quotient (Mean ± SD) | 112.6 ± 15.7 | 58.2 ± 14.3 | 102.8 ± 16.2 |
 Visual Reception Age Equiv (months ± SD) | 54.5 ± 8.8 | 32.3 ± 14.4 | 32.2 ± 13.3 |
 Fine Motor Age Equiv (months ± SD) | 44.6 ± 7.1 | 29.5 ± 12.0 | 29.5 ± 12.0 |
EEG Quality Measures | |||
 Number of 2 s Segments | 116.9 ± 17.4 | 82.1 ± 38.5 | 101.9 ± 34.4 |
 Percent Good Channels | 94.9 ± 4.0 | 94.1 ± 3.6 | 90.6 ± 3.8 |
 Percent ICs Rejected | 36.2 ± 7.6 | 34.0 ± 9.1 | 37.0 ± 10.0 |
 Median Artifact Probability | 0.03 ± 0.02 | 0.07 ± 0.04 | 0.05 ± 0.05 |