. Author manuscript; available in PMC: 2013 Feb 16.

Published in final edited form as: J Speech Lang Hear Res. 2007 Dec;50(6):1404–1424. doi: 10.1044/1092-4388(2007/098)

Table 3.

Mean factorial improvement in d′.

	Doubling in standard repetition number				Doubling in comparison repetition number
Syllable contrast	Low SNR		High SNR		Low SNR		High SNR
Syllable contrast	2:2–4:2	2:4–4:4	2:2–4:2	2:4–4:4	2:2–2:4	4:2–4:4	2:2–2:4	4:2–4:4
Stop	1.65	1.04	1.13	1.05	1.22	1.40	1.14	1.07
Liquid	1.71	0.90	2.58	1.07	1.27	1.02	1.40	0.92
Fricative	1.25	1.55	1.19	1.19	0.82	1.05	1.02	1.01