. Author manuscript; available in PMC: 2009 Nov 1.

Published in final edited form as: J Mem Lang. 2008 Nov;59(4):475–494. doi: 10.1016/j.jml.2007.11.006

Table 6.

TRACE parameters with default (standard) values, value range tested in individual difference simulations, and the general pattern of results

Parameter	Computational function	Default value	Value range	General pattern
k	Response competition	7	2–12	Primary variability in curve shape with positively correlated cohort and frequency effects
α_pw	Phoneme-to-word weights	0.05	.01–.09	Positive correlation between frequency and cohort effects (frequency effects more variable)
δ_p	Phonological decay rate (working memory)	0.03	.01–.05	Variability in cohort effects but not in frequency effects
δ_w	Lexical decay rate (working memory)	0.05	.01–.09	Variability in cohort effects but not in frequency effects
γ_w	Lexical layer competition	0.03	.01–.05	Positive correlation between frequency and cohort effects (cohort effects more variable)
s	Frequency sensitivity	0.13	.03–.23	Negative correlation between frequency and cohort effects