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. Author manuscript; available in PMC: 2017 Dec 22.
Published in final edited form as: Psychiatry Res. 2017 Aug 24;258:305–315. doi: 10.1016/j.psychres.2017.08.058

Table 5.

Fidelity of value-based choice, by clinical groups.

OCD
OCD/HD
HD
Mean diff. Test statistics Effect size p-value Mean diff. Test statistics Effect size p-value Mean diff. Test statistics Effect size p-value
Gains
Suboptimal choices 0.12 U = 143.5 0.17 0.28 0.12 U = 101.5 0.37 0.02 −0.03 U = 164.5 0.07 0.65
Inconsistent choices 0.10 F(1,36) = 5.08 0.69 0.03 0.09 F(1,36) = 3.02 0.55 0.09 0.04 F(1,36) = 0.67 0.26 0.42
Model fit, R2 −0.15 U = 97.5 0.39 0.02 −0.15 F(1,36) = 5.96 0.76 0.02 0.03 F(1,36) = 0.02 0.05 0.88
Losses
Suboptimal choices 0.08 U = 133.5 0.22 0.17 0.02 U = 169 0.05 0.75 0.00 U = 140 0.19 0.24
Inconsistent choices 0.08 F(1,36) = 2.34 0.49 0.14 0.11 F(1,36) = 4.31 0.64 0.05 0.01 F(1,36) = 0.05 0.07 0.82
Model fit, R2 −0.07 F(1,36) = 0.96 0.32 0.33 −0.13 F(1,36) = 3.99 0.63 0.05 0.03 F(1,36) = 0.17 0.13 0.69

Note: For normally distributed variables means were compared using 1-way ANOVA, effect size is Cohen’s d; for variables that were not normally distributed distributions were compared using Mann-Whitney U Test; effect size for Mann- Whitney U test is equal to Z/N. In bold are effects of diagnoses that are significant at p = 0.05.