Figure 2. Spatio-temporal hierarchy.
(A) Mass-univariate statistics. Each row plots the average-across-subjects beta coefficients obtained from regression between single-trial evoked activity and each of the five features orthogonally varying in this study. These results are displayed in Video 2. Colors are thresholded based on t-values that exceed an uncorrected p<0.1. We chose this threshold because the perceptual category did not exceed the significance threshold in the univariate tests. (B) Spatial-decoders, consisting of linear models fit across all time sample for each source separately, summarize where each feature can be decoded. Lines indicate significant clusters of decoding scores across subjects cluster-corrected p<0.05. (C) Temporal-decoders, consisting of linear models fit across all MEG channels, for each time sample separately, summarize when each feature can be decoded. To highlight the sequential generation of each representation, decoding scores are normalized by their respective peaks. Additional non-normalized decoding timecourses are available in Figure 2—figure supplements 1 and 2. (D) The peak and the start of temporal decoding plotted for each subject (dot) and for each feature (color). (E) The peak spatial decoding plotted for each subject (dot) and for each feature (color).
Figure 2—figure supplement 1. Exhaustive set of results for decoding different features of the stimulus, time-locked to stimulus onset.
Figure 2—figure supplement 2. Exhaustive set of results for decoding different features of the stimulus, time-locked to motor onset.
Figure 2—figure supplement 3. Decoding letter/digit contrast for symbols not presented in the active condition, where subjects viewed the symbols passively and did not have to make a motor response.
Figure 2—figure supplement 4. Univariate significance mask for ‘Stimulus Position’.
Figure 2—figure supplement 5. Univariate significance mask for ‘Stimulus Identity’.
Figure 2—figure supplement 6. Univariate significance mask for ‘Uncertainty’.
Figure 2—figure supplement 7. Univariate significance mask for ‘Motor Side’.
Figure 2—figure supplement 8. Univariate significance across the four significant features.
Figure 2—figure supplement 9. Significance of multivariate tests across the five significant features.
Figure 2—figure supplement 10. Non-corrected log-transformed (base 10) p-values for the mass univariate tests, plotted for each of the five features.
Figure 2—figure supplement 11. Average decoding timecourses for each of the five features.
