. 2008 Jun;123(6):4369–4379. doi: 10.1121/1.2904826

TABLE II.

Mean parameters of the psychometric function fits for the different spatial configurations, averaged across subjects (across-subject standard error of the mean is shown in round brackets). The upper asymptote of performance is higher for spatially separated sources than for co-located sources, but no other differences are significant. (A) Estimates of $α$ , the TMR at the midpoint of the dynamic range in the psychometric function. (B) Estimates of $1 ∕ β$ , the slope of the psychometric function at the midpoint of the dynamic range. (C) Estimates of $1 - λ$ , the upper asymptote of the functions.

	T0M0	T90M90	T0M90	T90M90
(A) Midpoint of dynamic range $α$ [dB]	27.4 (1.4)	24.5 (1.6)	23.5 (1.8)	24.2 (1.0)
(B) Slope at the midpoint ofdynamic range $1 ∕ β$ [% correct / dB]	27.8 (11.0)	24.8 (16.3)	16.7 (4.5)	19.0 (3.4)
(C) Upper asymptote ofperformance $1 - λ$ [% correct]	71.3 (4.6)^a	72.4 (5.2)^a	96.5 (2.0)	93.9 (4.2)

^{^a}

Statistically significant difference between co-located and spatially separated configurations.