Table 1.

Parameters used in the SDT-based model to simulate the behavioural performance obtained experimentally for each of the five ferrets tested in the signal-in-noise detection task. Also presented are (1) the mean correlation coefficient between simulated blocks of sessions and (2) the mean correlation coefficient between each experimental block of sessions and the corresponding set of simulated blocks of sessions. The correlation coefficients were calculated separately for P(c)_max, hit and false alarm values (note that false alarm correlations would not be meaningful for the Method of Constant Stimuli)

Ferret	Internal s.d. (dB)	Block criterion bias (mean + s.d., dB)	Guess rate (%)	Reference level (dB SPL)	Trial shift i − 1	Trial shift i − 2	(1) sim–sim			(2) exp–sim
							r2P(c)max	r2 hits	r2 fa	r2P(c)max	r2 hits	r2 fa
Method of Limits
F1, 35	10.54	1.8 ± 1.52	1	12.54	2	1	0.93	0.87	0.84	0.90	0.82	0.74
F1, 55	11.83	1.48 ± 0.02	1	31.55	2	1	0.86	0.78	0.74	0.81	0.72	0.62
F2	9.2	3.78 ± 3.12	1	37.35	2	1.5	0.90	0.77	0.73	0.94	0.90	0.87
F3	11.29	1.03 ± 0.03	5	39.46	2.5	2	0.86	0.79	0.72	0.86	0.70	0.31
F4	11.00	1.05 ± 1.80	5	29.86	2	1.5	0.91	0.80	0.79	0.81	0.38	0.62
F5	7.24	1.85 ± 0.84	1.3	30.30	2	1	0.94	0.92	0.84	0.92	0.76	0.28
						Mean r2	0.89	0.82	0.77	0.87	0.71	0.57
							(1) sim–sim		(2) exp–sim
							r2P(c)max	r2 hits	r2P(c)max	r2 hits
Method of Constant Stimuli
F1, 35	11	2.98 ± 0.34	1	12	2.5	1	0.92	0.95	0.80	0.88
F1, 55	11.8	3.40 ± 0.07	1	32.76	3	2.5	0.88	0.93	0.81	0.87
F2	8.07	3.62 ± 0.11	1	37.39	2	1.5	0.91	0.96	0.68	0.85
F3	11.86	4.19 ± 0.06	2	40.51	3.5	3	0.90	0.95	0.90	0.86
F4	10.50	3.20 ± 1.84	1	35.14	2	1.5	0.89	0.93	0.83	0.87
F5	11.09	2.24 ± 0.89	2	26.29	2	1.5	0.85	0.92	0.58	0.74
						Mean r2	0.89	0.94	0.76	0.84