Parametric study of EEG sensitivity to phase noise during face processing

BMC Neuroscience

Table 1 Model fit results and 95% confidence intervals in the three experiments

		Experiment 1: Faces	Experiment 2: Pink Noise Textures	Experiment 3: Wavelet Textures
Max R²	Mean Amplitude	36.4 [29.2 44.6]	5.8 [3.6 8.3]	21.7 [12.4 30.4]
	Min Amplitude	19.9	2.8	5.5
	Max Amplitude	67.4	13.1	36.6
	Mean Latency	145 [142 148]	250 [228 272]	229 [180.8 296.6]
Phase	Onset Latency	127 [121 134]	NA	218 [161 263]
	Peak Latency	160 [154 168]	NA	228 [175 269]
	Onset-Peak Latency Difference	33 [26 42]	NA	10 [6 14]
Kurtosis	Onset Latency	127 [122 132]	NA	175 [163 199]
	Peak Latency	143 [137 148]	NA	204 [187 219]
	Onset-Peak Latency Difference	16 [13 19]	NA	29 [20 42]
Phase × Kurtosis	Onset Latency	150 [133 171]	NA	NA
	Peak Latency	166 [151 185]	NA	NA
	Onset-Peak Latency Difference	16 [12 20]	NA	NA

R² values are expressed as percentages. Latencies are expressed in ms. Regarding max R², all the pairwise comparisons were significant (percentile bootstrap, 1000 resamples): Experiment 1 vs. Experiment 2, mean difference 30% [22 39], p = 0; Experiment 1 vs. Experiment 3, mean difference 15% [3 27], p = .009; Experiment 2 vs. Experiment 3, mean difference 16% [5 25], p = .002. Phase, Kurtosis, and Phase × Kurtosis interaction regressor time courses were analyzed at the electrode showing the max R² for each subject individually. Onset Latency refers to the earliest time at which a given model parameter contributed significantly to explaining the EEG data. NA stands for non-applicable, which corresponds to situations where only one subject showed a significant effect (Experiment 3) or the values are meaningless because of the poor model fit and the lack of significant effects (Experiment 2)

ISSN: 1471-2202