Figure 2.

SAM stimulus waveforms and paradigms. Top, SAM waveforms were 500 ms epochs (450 ms stimuli plus 50 ms gap). Bottom, Stimulus paradigms for SEQ SAM and RAN SAM stimuli. One hundred or 160 stimulus trials were included in each stimulus paradigm. For the sequential SAM paradigm, the stimulus set progressed sequentially from 1 to 10 or 16 trials of 2 Hz, then to 4 Hz, etc., ending at 1024 Hz. For the random/interleaved SAM paradigm, 100 or 160 trials of stimuli were presented randomly such that each SAM stimulus trial was at a different fm ranging from 2 to 1024 Hz.