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. 2023 May 23;17:1149265. doi: 10.3389/fnins.2023.1149265

Table 2.

The statistical analysis results of P300 amplitude and latency of different levels of stimulation with the same stimulation mode.

Mode Parameter Sample normality Homogeneity of variance Test method Result
Mode 1 P300 amplitude Sample normality confirmed (p = 0.998, p = 0.067, p = 0.074) Homogeneity of variance confirmed (p = 0.920) One-way ANOVA (p = 0.295) No significant difference
Mode 1 P300 latency Sample normality not confirmed (p = 0.048, p = 0.153, p = 0.311) Null Friedman test (p = 0.417) No significant difference
Mode 2 P300 amplitude Sample normality confirmed (p = 0.206, p = 0.265, p = 0.612) Homogeneity of variance confirmed (p = 0.944) One-way ANOVA (p = 0.414) No significant difference
Mode 2 P300 latency Sample normality not confirmed (p = 0.037, p = 0.739, p = 0.033) Null Friedman test (p = 0.197) No significant difference
Mode 3 P300 amplitude Sample normality confirmed (p = 0.520, p = 0.959, p = 0.354) Homogeneity of variance confirmed (p = 0.932) One-way ANOVA (p = 0.867) No significant difference
Mode 3 P300 latency Sample normality not confirmed (p = 0.196, p = 0.018, p = 0.626) Null Friedman test (p = 0.607) No significant difference