Table 1.

Experiment 1 psychometric function (PF) parameters for listeners with normal hearing (LNH) in variable signal (VS), on-frequency forward-masking conditions [QT=quiet threshold; SD=standard deviation].

Signal frequency	Masker level	Parameter	078	100	102	108	175	Mean(SD)
0.25 kHz	QT	Threshold	30.84	27.64	38.37	32.36	31.39	32.12 (3.92)
		Slope	1.79	0.99	0.74	0.63	2.04	1.11
		r2	0.99	0.98	0.88	0.92	0.95
	30	Threshold	31.72	30.55	41.29	34.74	35.07	34.67 (4.17)
		Slope	0.80	1.31	1.34	0.69	1.13	1.02
		r2	0.99	0.99	0.87	0.99	0.96
	50	Threshold	43.14	45.33	48.51	44.34	45.09	45.28 (2.0)
		Slope	0.72	0.57	1.10	0.37	1.25	0.73
		r2	0.98	0.98	0.97	0.94	1.0
	70	Threshold	53.20	56.42	59.29	57.74	55.14	56.36 (2.34)
		Slope	0.48	0.47	0.50	0.28	0.73	0.47
		r2	0.96	0.89	0.93	0.82	0.92
	90	Threshold	64.40	68.00	75.77	72.74	66.24	69.43 (4.71)
		Slope	0.37	0.35	0.38	0.27	0.76	0.40
		r2	0.93	0.96	0.98	0.89	0.98
4 kHz	QT	Threshold	17.15	13.28	22.01	16.91	15.27	16.93 (3.24)
		Slope	1.05	1.93	1.16	2.42	1.36	1.58
		r2	0.98	1.00	0.98	0.99	1.00
	30	Threshold	27.68	23.71	30.10	27.67	27.57	27.35 (2.30)
		Slope	1.24	2.23	0.83	0.52	5.57	1.46
		r2	0.99	0.99	0.85	0.84	1.00
	50	Threshold	36.16	30.66	43.39	37.32	33.04	36.11 (4.84)
		Slope	1.11	0.73	0.78	0.30	0.91	0.71
		r2	0.99	0.92	0.97	0.86	0.95
	70	Threshold	40.94	38.86	51.49	50.56	39.08	44.18
		Slope	1.07	0.52	0.53	0.20	0.83	0.55
		r2	0.99	0.96	0.93	0.79	0.95
	90	Threshold	52.09	50.42	73.14	77.92	53.04	61.32 (13.11)
		Slope	1.00	0.39	0.40	0.28	0.30	0.42
		r2	0.99	0.98	0.90	0.95	0.95