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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 6.

Shifted exponential function parameter values and fit indices for fits to d’ accuracy data in our experiment

Parameter Fit index
Subject Model δ 1 δ 2 1/β1 1/β2 λ 1 λ 2 AIC BIC R2
1 1δ-2β-1λ 521 521 407 667 4.65 4.65 19.8 19.2 .962
2 1δ-2β-1λ 634 634 125 525 4.64 4.64 23.4 22.9 .979
3 1δ-2β-1λ 665 665 364 1151 4.06 4.06 13.7 13.2 .978
4 2δ-2β-1λ 663 763 555 845 4.00 4.00 22.0 19.9 .940
5 2δ-1β-1λ 668 908 838 838 4.54 4.54 26.2 25.6 .928
6 2δ-1β-1λ 604 701 532 532 4.84 4.84 23.0 22.4 .966
7 1δ-2β-1λ 642 642 806 1808 4.80 4.80 16.2 15.6 .968
8 1δ-2β-1λ 757 757 693 1672 3.96 3.96 19.2 18.6 .950
9 2δ-1β-1λ 730 958 589 589 4.48 4.48 15.3 14.7 .970
10 1δ-2β-1λ 717 717 304 913 3.90 3.90 22.6 22.0 .931
Group 1δ-2β-1λ 639 639 622 1206 4.52 4.52 9.2 8.7 .988

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.