Table 2.
Mean MMN amplitudes and latencies within groups.
| MMN parameter | Group values | aMCI vs. naMCI/SMI | |||
|---|---|---|---|---|---|
| SMI | naMCI | aMCI | F(1,54) | p | |
| Amplitudes | |||||
| Opt–Dur | −2.2 ± 1.1 | −2.1 ± 1.2 | −2.1 ± 1.1 | 0.01 | 0.910 |
| Opt–Freq | −1.1 ± 0.7 | −1.1 ± 1.0 | −1.3 ± 1.0 | 1.02 | 0.317 |
| Opt–Intens | −1.4 ± 1.0 | −1.4 ± 1.3 | −1.9 ± 1.4 | 1.76 | 0.191 |
| Opt–Loc | −1.1 ± 0.8 | −1.4 ± 1.6 | −1.2 ± 1.1 | 0.01 | 0.935 |
| Opt–Gap | −1.1 ± 1.3 | −1.2 ± 1.0 | −1.2 ± 1.0 | 0.02 | 0.880 |
| MemTra–Dur | −1.1 ± 1.2 | −1.0 ± 1.4 | −0.5 ± 1.2 | 3.06 | 0.086 |
| ΔMMN–Dur | −1.0 ± 1.3 | −1.1 ± 1.4 | −1.7 ± 1.2 | 3.03a | 0.087 |
| Latencies | |||||
| Opt–Dur | 183.5 ± 23.5 | 184.5 ± 21.2 | 190.4 ± 29.8 | 0.74 | 0.394 |
| Opt–Freq | 191.7 ± 20.5 | 198.7 ± 21.7 | 199.0 ± 26.4 | 0.21 | 0.651 |
| Opt–Intens | 213.0 ± 23.9 | 208.5 ± 25.4 | 210.5 ± 29.7 | 0.50 | 0.483 |
| Opt–Loc | 195.0 ± 28.7 | 200.4 ± 27.7 | 199.6 ± 27.4 | 0.01 | 0.940 |
| Opt–Gap | 174.2 ± 20.6 | 184.9 ± 24.2 | 177.2 ± 28.0 | 0.01 | 0.913 |
| MemTra–Dur | 203.7 ± 34.1 | 184.4 ± 31.3 | 187.3 ± 31.9 | 1.92 | 0.172 |
aMCI, amnestic MCI; naMCI, non-amnestic MCI; SMI, subjective memory impairment; Opt–Dur, MMN after duration deviants in the Optimum–1 paradigm; Opt–Freq, MMN after frequency deviants in the Optimum–1 paradigm; Opt–Intens, MMN after intensity deviants in the Optimum–1 paradigm; Opt–Loc, MMN after location deviants in the Optimum–1 paradigm; Opt–Gap, MMN after gap deviants in the Optimum–1 paradigm; MemTra–Dur, MMN after duration deviants in the Memory Trace paradigm; ΔMMN–Dur, difference score between MMN amplitude after duration deviant in the Optimum–1 paradigm and the Memory Trace paradigm, higher values indicating less auditory memory trace decay. aF(1,53).