TABLE 2.
Pearson r coefficients (first row of each cell), p-values (second row), and 95% CI (third row) of the correlations between individual MMSE scores and EEG features (and reaction times) as a function of task (averaged across tasks, resting state, detection level 1, and detection level 2); and the difference between correlation coefficients and CIs between tasks, as calculated by Meng et al. (1992) z extension of the Fisher Z transform (Dunn and Clark, 1969), including a test of the confidence interval for comparing two correlations.
| Averaged | Resting state | Detection level 1 | Detection level 2 | Resting state – Detection level 1 | Resting state – Detection level 2 | Detection level 1 – Detection level 2 | |
| RTs | r = –0.591, p = 0.0003**, (–0.78, –0.31) | r = –0.557, p = 0.0009***, (–0.76, –0.26) | r = –0.544, p = 0.003**, (–0.77, –0.21) | Δr = –0.013, p = 0.92, (–0.37, 0.33) | |||
| Delta | r = 0.064, p = 0.656, (–0.22, –0.34) | r = 0.031, p = 0.8422, (–0.27, 0.33) | r = 0.086, p = 0.554, (–0.2, 0.36) | r = 0.044, p = 0.77, (–0.24, 0.33) | Δr = –0.054, p = 0.67, (–0.31, 0.19) | Δr = –0.012, p = 0.91, (–0.23, 0.2) | Δr = 0.041, p = 0.55, (–0.1, 0.18) |
| Theta | r = 0.13, p = 0.367, (–0.15, –0.39) | r = 0.096, p = 0.541, (–0.21, 0.38) | r = 0.11, p = 0.426, (–0.17, 0.38) | r = 0.145, p = 0.329, (–0.15, 0.42) | Δr = –0.02, p = 0.88, (–0.27, 0.24) | Δr = –0.049, p = 0.68, (–0.29, 0.19) | Δr = –0.031, p = 0.65, (–0.16, 0.1) |
| A0 | r = –0.34, p = 0.016*, (–0.56, –0.07) | r = –0.245, p = 0.113, (–0.51, 0.06) | r = –0.38, p = 0.006**, (–0.6, –0.12) | r = –0.313, p = 0.033*, (–0.55, 0.03) | Δr = 0.14, p = 0.047*, (0.001, 0.31) | Δr = 0.068, p = 0.295, (–0.06, 0.21) | Δr = –0.071, p = 0.24, (–0.2, 0.05) |
| ST4 | r = 0.357, p = 0.011*, (0.09, 0.63) | r = 0.253, p = 0.102, (–0.05, 0.51) | r = 0.343, p = 0.015*, (0.07, 0.57) | r = 0.347, p = 0.017*, (0.07, 0.58) | Δr = –0.09, p = 0.511, (–0.39, 0.2) | Δr = –0.094, p = 0.357, (–0.33, 0.12) | Δr = –0.005, p = 0.95, (–0.18, 0.17) |
| VC9 | r = 0.076, p = 0.599, (–0.21, 0.35) | r = 0.067, p = 0.671, (–0.23, 0.36) | r = 0.094, p = 0.518, (–0.19, 0.36) | r = 0.071, p = 0.632, (–0.22, 0.35) | Δr = –0.027, p = 0.79, (–0.23, 0.18) | Δr = –0.01, p = 0.96, (–0.21, 0.2) | Δr = 0.02, p = 0.69, (–0.08, 0.13) |
| | A0, MMSE| - | ST4, MMSE| | Δr = –0.02, p = 0.89, (–0.32, 0.28) | Δr = 0.09, p = 0.95, (–0.3, 0.28) | Δr = 0.042, p = 0.77, (–0.28, 0.38) | Δr = –0.034, p = 0.8, (–0.34, 0.27) |
Significant effects are presented in bold (*p < 0.05, **p < 0.01, ***p < 0.001).