Table 1.

The frequencies (in Hz) of the tones forming the pairs in the low and high streams. Depending on the condition, the order of the tones was varied so that the within-pair pitch change was either ascending or descending. The deviant pairs were always reversals of the corresponding standard pairs.

Low stream:	High stream:
220–247	1319–1480
247–277	1480–1661
277–311	1661–1865
311–349	1865–2093
349–392	2093–2349