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Table 2 Time-frequency clusters with significant group differences

From: Neural synchronization deficits linked to cortical hyper-excitability and auditory hypersensitivity in fragile X syndrome

Cluster label Time range Peak time Peak frequency Statistic Direction of group difference
Phase-locking (ITC)
 Stimulus onset alpha 252 to 430 ms 288 ms 13 Hz t(32) = 3.4, p = .002 FXS > CON
 Stimulus offset theta 1883 to 2049 ms 1966 ms 3 Hz t(32) = 3.62, p = .001 CON > FXS
 Stimulus offset alpha 2084 to 2214 ms 2178 ms 9 Hz t(32) = 3.20, p = .003 FXS > CON
 Chirp 607 to 1068 ms 761 ms 42 Hz t(32) = 2.8, p = .008 CON > FXS
 Chirp harmonic 382 to 631 ms 406 ms 50 Hz t(32) = 2.9, p = .007 CON > FXS
Single trial power
 Overall gamma −220 to 2722 ms 819 ms 57 Hz t(32) = 2.8, p = .008 FXS > CON
Baseline corrected single trial power
 Stimulus onset alpha 229 to 335 ms 276 ms 11 Hz t(32) = 3.0, p = .005 FXS > CON
 80 Hz 855 to 2462 ms 914 ms 82 Hz t(32) = 3.0, p = .005 CON > FXS
 110 Hz stimulus onset 300 to 619 ms 572 ms 112 Hz t(32) = 3.0, p = .005 CON > FXS
 110 Hz late 1647 to 2462 ms 2261 ms 112 Hz t(32) = 3.1, p = .005 CON > FXS
  1. Cluster names are identified by stimulus association and frequency band. Time ranges are given relative to initial stimulus onset, to provide equivalency with the X axes in Fig. 2. Cluster peaks are identified for highest t values, not for peaks of activity. For overall gamma single trial power, a peak statistic is reported; however, it should be noted that group differences were remarkably stable throughout the time period