Fig. 6.

Differential envelope tracking with increased spectral detail. (A) Change in envelope tracking across conditions with 1, 2, 3 and 6 concurrently presented envelope-carrier pairs, computed separately for Env_low and Env_high. Regressing MI values (LinReg) for Env_low against the number of presented envelope-carrier pairs revealed stronger tracking with more spectral detail in delta1 to theta1 (1 - 6 Hz), while MI values of Env_high decreased in delta2 to theta2 (2 - 8 Hz). (B) Contrast of MI values for Env_high minus Env_low in conditions with 3 and 6 simultaneously presented envelope-carrier pairs. Topographies show the electrode-wise t-values for the group-level statistics (derived using cluster-based permutation statistics, p<0.01). Panels on the right show individual data for each cluster (red for positive and blue for negative clusters). (C) MI values averaged across fronto-central electrodes (inlay) for Env_low, Env_mid, and Env_high. Error bars indicate s.e.m. across participants. The 12-band condition was not included in the statistical analyses in panels A and B, and is shown for completeness only (see Materials and Methods). (For interpretation of the references to colour in this figure legend, the reader is referred to the web version of this article.)