Table 3

Comparisons of the TOMM and the yes/no recognition test (Alsterdorfer Faces Test) variables between participants instructed to malinger and participants instructed to perform normally
Variable Instructed malingering participants (n = 20) Instructed non-malingering participants (n = 20)
TOMM W + value Z-value
Wilcoxon signed-rank tests
TOMM trial 1 M = 30.95, S = 9.73 M = 48.45, S = 2.48 218.5*** −5.25
Min = 10, Max = 47 Min = 42, Max = 50
TOMM trial 2 M = 32.95, S = 11.32 M = 49.95, S = 0.22 222*** −5.44
Min = 6, Max = 50 Min = 49, Max = 50
Yes/No Recognition Test t-value df Cohen’s d
Independent t-tests
Discrimination Index (Pr) 0.17 0.76 −7.86*** 27.99 −2.49
(0.30) (0.15)
False negative responses 9.65 2.85 8.05*** 38 2.54
(3.00) (2.30)
False positive responses a 6.95 1.90 4.36*** 26.02 1.38
(4.74) (2.08)

*** = p ≤ 0.001. Standard deviations appear in parentheses below means. a 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 the Wilcoxon’s signed-rank test.

Schindler et al.

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

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