Table 3.
Statistically significant differences between groups at single midline electrodes
| ERP feature | Stimulus | Type | Loc. | HC | AD | P value |
|---|---|---|---|---|---|---|
| P3a | Distractor | Av. Ampl. | Cz | 4.03 ± 0.42 | 1.32 ± 0.35 | <.001 |
| P3a | Distractor | Av. Ampl. | Pz | 4.31 ± 0.34 | 2.22 ± 0.32 | <.001 |
| P3a | Distractor | Amplitude | Cz | 6.96 ± 0.50 | 3.98 ± 0.49 | <.001 |
| P3a | Distractor | Amplitude | Pz | 7.01 ± 0.42 | 4.54 ± 0.46 | <.001 |
| N100 | Standard | Amplitude | Fz | −9.69 ± 0.31 | −8.01 ± 0.35 | .001 |
| N100 | Standard | Amplitude | Cz | −8.78 ± 0.33 | −7.20 ± 0.32 | .002 |
| P3a | Distractor | Av. Ampl. | Fz | 2.76 ± 0.42 | 0.77 ± 0.41 | .003 |
| N100 | Standard | Av. Ampl. | Fz | −6.47 ± 0.24 | −5.35 ± 0.28 | .007 |
| P3b | Target | Amplitude | Pz | 7.36 ± 0.39 | 5.74 ± 0.38 | .010 |
| N100 | Standard | Av. Ampl. | Cz | −5.64 ± 0.24 | −4.60 ± 0.26 | .012 |
| N100 | Target | Av. Ampl. | Cz | −5.26 ± 0.28 | −4.12 ± 0.29 | .015 |
| N100 | Standard | Amplitude | Pz | −4.82 ± 0.26 | −3.87 ± 0.24 | .025 |
| N100 | Target | Amplitude | Cz | −8.03 ± 0.37 | −6.74 ± 0.36 | .028 |
| N100 | Target | Amplitude | Pz | −4.32 ± 0.25 | −3.39 ± 0.26 | .034 |
| N100 | Distractor | Amplitude | Fz | −6.85 ± 0.39 | −5.39 ± 0.44 | .039 |
| P3b | Target | Latency | Pz | 395.8 ± 6.2 | 419.3 ± 7.6 | .049 |
Abbreviations: Loc., electrode location according to the 10/20 system; HC, healthy controls; AD, mild Alzheimer's disease; Av. Ampl, average amplitude; SEM, standard error of the mean.
NOTE. Data are represented as mean ± SEM. P values shown are adjusted using the Bonferroni correction for multiple comparisons. Only significant differences between groups are shown.