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. Author manuscript; available in PMC: 2013 May 1.
Published in final edited form as: Cogn Psychol. 2011 Dec 21;64(3):127–160. doi: 10.1016/j.cogpsych.2011.11.001

Table 4.

Shifted exponential function parameter values and fit indices for fits to d’ accuracy data in Wickelgren and Corbett (1977)

Parameter Fit index
Subject Model δ 1 δ 2 1/β1 1/β2 λ 1 λ 2 AIC BIC R2
PB 1δ-2β-1λ 460 460 350 596 5.05 5.05 17.6 17.1 .980
EC 2δ-1β-2λ 543 604 292 292 4.02 2.09 18.5 16.3 .966
SS 2δ-1β-2λ 542 451 364 364 3.90 2.36 11.1 9.0 .961
CL 1δ-2β-2λ 417 417 155 381 3.35 2.36 16.4 14.3 .919
CM 2δ-1β-2λ 441 567 369 369 4.46 2.56 15.7 13.6 .960
SJ 2δ-2β-1λ 496 360 162 654 2.73 2.73 17.3 15.1 .902
Group 1δ-1β-2λ 463 463 356 356 3.92 2.45 3.6 3.0 .986

Note. “Group” indicates the value from a fit to the group data. The parameters are the intercept (δ), rate (β), and asymptote (λ) for the Fan 1 and Fan 2 conditions (denoted by the subscripts 1 and 2, respectively). The parameter values and fit indices are for the model variant with the lowest BIC value.