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)

Rousselet et al. BMC Neuroscience 2008 9:98   doi:10.1186/1471-2202-9-98

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