Table 1.

Estimates of spectral integration were computed as the lowest single-frequency signal threshold minus the associated multi-frequency signal threshold. The sem is indicated in parentheses. Assuming d^′ is proportional to signal intensity, integration of five independent cues is predicted to be 3.5 dB.

Masker condition	Signal condition (phase∕amplitude)
	Random-ϕ, equal	Fixed-ϕ, equal	Random-ϕ, normalized	Fixed-ϕ, normalized
All-random	1.55	1.19	3.30	2.87
	(0.51)	(0.60)	(0.62)	(0.49)
All-coherent	−2.07	−10.45	−1.31	−5.76
	(0.89)	(0.83)	(0.69)	(0.82)