Table 2

Comparisons of the TOMM and the yes/no recognition test (Alsterdorfer Faces Test) variables between the four groups of the clinical sample
Variable Probably malingering claimants Probably non-malingering claimants Inpatients with dementia Inpatients with affective disorder
(n = 11) (n = 40) (n = 13) (n = 51)
TOMM W + value Z-value
Wilcoxon signed-rank tests
TOMM trial 1 M = 33.36, S = 8.35 M = 46.53, S = 3.95 - - 88*** −4.56
Min = 21, Max = 47 Min = 32, Max = 50
TOMM trial 2 M = 34.55, S = 8.38 Ma = 49.53, Sa = 1.09 - - 66*** −5.27
Min = 16, Max = 43 Min = 45, Max = 50
Yes/No Recognition Test F(3,111) η2
Analyses of Variance
Discrimination Index P(r) 0.35a 0.69b 0.41a 0.68b 16.92*** 0.31
(0.25) (0.21) (0.19) (0.15)
False negative responses b 9.09a 3.78b 4.69b 3.47b 11.58*** 0.24
(4.04) (3.16) (2.59) (2.55)
False positive responses b 4.00a 2.48a 6.92b 2.94a 11.52*** 0.24
(3.03) (2.01) (3.52) (2.34)

*** = p ≤ 0.001. Standard deviations appear in parentheses below means; means in the same row sharing the same superscript letter do not differ significantly from one another at p ≤ 0.05; means that do not share subscripts differ at p ≤ 0.05 based on Scheffé test post-hoc paired comparisons.

a This value is based on 26 claimants that actually performed trial 2, in 14 claimants with values ≥ 48 in trial 1, trial 2 was estimated to be 50/50.

b False negative and false positive responses did not exhibit standard normal distribution measured by the Shapiro-Wilk test of normality. Parametric results are reported for readability. Results were confirmed by Kruskal-Wallis tests and post-hoc Wilcoxon´s signed-rank tests.

Schindler et al.

Schindler et al. BMC Psychology 2013 1:12   doi:10.1186/2050-7283-1-12

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