Table 2.

Stimuli

Frequency of interval presentation	Frequency of note1 (Hz)	Frequency of note2 (Hz)
		Fifth	Tritone
12.5% (Deviant trial)	200	133.33	142.22
75% (Standard trial)	230	153.33	163.55
12.5% (Deviant trial)	260	173.33	184.88

Note. Note1 and note2 were always played simultaneously for 50 ms. Three intervals with varying frequencies were displayed for each interval type. Each interval type had a constant frequency ratio between note1 and note2. For each interval type, intervals with note1 set at 230 Hz were considered Standard and were displayed in 75% of the trials. The remaining two intervals with note1 set at 200 and 260 Hz were considered Deviant and were displayed in 12.5% of the trials.