Table 1.
Descriptives of Laboratory Neurocognitive Measures by Quintile of EMA Visual Working Task Performance
| Quintile of EMA Working Memory Task Performance |
||||||
|---|---|---|---|---|---|---|
| Total Sample (n=39) | 1 (n=7) | 2 (n=8) | 3 (n=8) | 4 (n=8) | 5 (n=8) | |
| Auditory Working Memory (WAIS-IV WMI) | ||||||
| Digit Span Scaled Score | 9.56 (2.58) | 8.29 (1.70)a,c | 8.22 (2.28)a,f | 9.63 (1.69) | 10.86 (1.77)c,f | 11.00 (3.78) |
| Letter-Number Sequencing Scaled Score | 9.62 (1.95) | 8.57 (.53)b,c | 8.56 (1.33)e,f | 9.88 (1.13)b,e | 10.14 (1.35)c,f | 11.00 (3.25) |
| WMI Index Score | 97.56 (12.04) | 97.29 (5.22)b,c | 90.78 (9.52)f | 98.50 (6.87)b | 102.57 (7.91)c,f | 105.38 (19.10) |
| Visual Working Memory (WMS-IV VWMI) | ||||||
| Spatial Addition Scaled Score | 8.97 (2.75) | 6.86 (1.57)b,d | 8.22 (2.59)g | 9.38 (2.26)b | 8.14 (2.79)h | 12.00 (1.69)d,g,h |
| Symbol Span Scaled Score | 9.79 (2.98) | 8.00 (1.73)d | 8.33 (2.35)g | 9.25 (2.60) | 10.00 (3.11)h | 13.38 (1.77)d,g,h |
| VWMI Index Score | 96.38 (14.22) | 84.86 (3.98)b,d | 90.00 (10.66)g | 95.88 (11.89)b | 94.71 (13.09)h | 115.63 (7.39)d,g,h |
| General Intelligence (WTAR) | ||||||
| WTAR Standard Score | 103.97 (13.76) | 100.86 (10.81)d | 92.78 (17.17)e,g | 110.38 (11.24)e | 103.86 (9.10)h | 113.00 (9.09)d,g,h |
| Predicted FSIQ | 101.85 (11.04) | 98.71 (9.67)d | 92.56 (11.81)e,g | 106.38 (8.77)e | 101.57 (7.85) | 110.75 (7.55)d,g |
| Verbal Abilities (WAIS-IV Similarities) | ||||||
| Similarities Scaled Score | 11.15 (3.29) | 11.14 (2.41) | 8.67 (2.00)e,g | 12.00 (3.16)e | 11.14 (4.26) | 13.13 (3.23)g |
| Processing Speed (WAIS-IV PSI) | ||||||
| Symbol Search Scaled Score | 11.85(2.92) | 10.29 (2.06) | 11.56 (2.74) | 12.63 (3.42) | 12.43 (2.99) | 12.25 (3.28) |
| Coding Scaled Score | 10.69 (2.82) | 9.71 (2.21) | 10.00 (3.00) | 11.38 (2.77) | 11.00 (3.92) | 11.38 (2.26) |
| PSI Index Score | 106.23 (13.76) | 99.86 (9.89) | 104.33 (14.64) | 107.25 (14.25) | 109.71 (17.56) | 109.88 (12.59) |
Note. Values represent means (standard deviations); WAIS-IV, Wechsler Adult Intelligence Scale-Fourth Edition; WMI, Working Memory Index; WMS-IV, Wechsler Memory Scale-Fourth Edition; VWMI, Visual Working Memory Index; WTAR, Wechsler Test of Adult Reading; FSIQ, Full Scale IQ; PSI, Processing Speed Index.
Across quintiles, mean values with shared alphabetic superscripts signify significant pairwise comparisons; all other pairwise comparisons were nonsignificant at p > .05.