Table 4.

Experiment 3 psychometirc function (PF) parameters for listeners with normal hearing (LNH) in variable signal (VS), on- and off-frequency forward-masking conditions [SD=standard deviation].

Signal frequency	Masker frequency	Masker level	Parameter	231	232	235	243	Mean (SD)
0.25 kHz	0.25 kHz	50	Threshold	45.535	43.274	45.436	45.288	44.88 (1.08)
			Slope	0.510	0.576	0.451	1.469	0.66
			r2	0.717	0.877	0.730	0.980
		70	Threshold	58.840	51.398	61.243	56.340	56.96 (4.21)
			Slope	0.379	0.444	0.360	0.734	0.46
			r2	0.806	0.775	0.940	0.913
		90	Threshold	69.756	63.140	72.836	62.723	67.11 (4.99)
			Slope	0.368	0.312	0.231	0.712	0.37
			r2	0.785	0.860	0.862	0.958
		90, 5 ms delay	Threshold	78.031	70.993	77.174	66.855	73.26 (5.30)
			Slope	0.313	0.398	0.425	0.484	0.40
			r2	0.725	0.851	0.937	0.956
0.25 kHz	0.15 kHz	50	Threshold	41.198	37.269	37.856	38.891	38.80 (1.73)
			Slope	0.851	0.476	0.171	1.112	0.53
			r2	0.823	0.759	0.537	0.958
		70	Threshold	50.665	49.148	50.133	49.493	49.86 (0.68)
			Slope	0.458	0.333	0.466	0.753	0.48
			r2	0.938	0.824	0.951	0.960
		90	Threshold	65.966	62.810	66.138	62.388	64.33 (2.00)
			Slope	0.189	0.380	0.419	0.407	0.33
			r2	0.612	0.760	0.533	0.832
		90, 5 ms delay	Threshold	72.137	67.238	69.105	65.809	68.57 (2.73)
			Slope	0.567	0.544	0.388	0.707	0.54
			r2	0.904	0.907	0.910	0.909
4 kHz	4 kHz	50	Threshold	34.399	38.942	39.050	33.846	36.56 (2.82)
			Slope	0.266	0.422	0.748	1.179	0.56
			r2	0.735	0.916	0.927	0.982
		70	Threshold	44.047	49.478	43.455	39.533	44.13 (4.09)
			Slope	0.167	0.263	0.369	0.628	0.32
			r2	0.650	0.767	0.749	0.936
		90	Threshold	53.778	59.283	46.405	46.781	51.56 (6.16)
			Slope	0.140	0.186	0.160	0.829	0.24
			r2	0.676	0.826	0.593	0.918
		90, 5 ms delay	Threshold	53.392	67.762	51.891	55.337	57.10 (7.25)
			Slope	0.152	0.243	0.554	0.337	0.29
			r2	0.663	0.719	0.905	0.946
4 kHz	2.4 kHz	50	Threshold	22.003	17.794	21.254	18.162	19.81 (2.14)
			Slope	0.534	0.717	1.384	1.154	0.88
			r2	0.796	0.937	0.986	0.947
		70	Threshold	39.370	31.387	32.362	34.533	34.41 (3.56)
			Slope	0.504	1.196	1.268	0.288	0.69
			r2	0.925	0.982	0.990	0.496
		90	Threshold	67.912	59.204	51.551	55.297	58.49 (7.02)
			Slope	0.198	0.165	0.911	0.446	0.34
			r2	0.673	0.547	0.969	0.952
		90, 5 ms delay	Threshold	64.035	63.494	56.626	63.266	61.86 (3.50)
			Slope	0.405	0.236	0.525	0.318	0.36
			r2	0.899	0.678	0.840	0.915