Table 1.
Means and standard deviations (in parentheses) for the demographic and behavioral measures for the full sample and the Low and High Categorical Perception Index (CPI) groups.
| All (n = 32) | Low CPI (n = 9) | High CPI (n = 23) | |
|---|---|---|---|
| Age | 10.30 (1.54) | 10.52 (1.82) | 10.22 (1.46) |
| Sex (% F) | 37.5 | 33.3 | 39.1 |
| Socioeconomic Status | 50.1 (12.4) | 49.8 (10.9) | 50.2 (13.2) |
| WASI Estimated IQ | 115.13 (11.11) | 111.56 (10.04) | 116.52 (11.41) |
| WRAT-3 Reading | 111.72 (7.68) | 109.67 (8.63) | 112.52 (7.33) |
| CTOPP Elision | 11.66 (2.27) | 11.64 (2.24) | 11.67 (2.35) |
| CTOPP RLN | 10.72 (2.56) | 10.89 (2.37) | 11.96 (2.20) |
| CPI | 68.77 (22.37) | 37.44 (11.69) | 81.02 (9.85) |
| P Response Time | 1133.48 (267.32) | 1113.56 (401.73) | 1141.28 (204.41) |
| N Response Time | 1088.23 (251.51) | 1034.83 (363.25) | 1109.13 (198.83) |
| P Identification Slope | 1.39 (1.09) | 1.13 (1.19) | 1.45 (1.02) |
| N Identification Slope | 0.51 (0.49) | 0.39 (0.50) | 0.58 (0.47) |
| % P Motion Trials Removed | 10.59 (7.23) | 13.52 (8.09) | 9.44 (7.60) |
| % N Motion Trials Removed | 11.39 (10.09) | 14.32 (5.74) | 10.24 (11.24) |
| % Missed in P | 4.34 (3.81) | 4.51 (4.49) | 4.28 (3.62) |
| % Missed in N | 4.88 (5.57) | 4.69 (5.15) | 4.95 (5.84) |
WASI = Wechsler Abbreviated Scale of Intelligence; WRAT-3 = Wide Range Achievement Test – 3; CTOPP = Comprehensive Test of Phonological Processing; RLN = Rapid Letter Naming; P = Phonemic; N = Nonphonemic