Background Methods Results Conclusions

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scoring according to Verhage system (1=less than 6 years, 7=University degree). Table 2 Correlations ADI-NL sub scales, SIMS, BDI-2 and OQ matrix tests ...
The Assessment of Depression Inventory (ADI) Dutch Version First Findings in Normal Controls, Instructed Simulators, Liability Claimants and Depressed Patients Machteld van Leeuwen1, Sylvia Verwer, Sascha Meyer1, Ben Schmand2 and Jos F De Jonghe1 1: Department of Geriatric Medicine and Medical Psychology, Medical Center Alkmaar, Netherlands 2: University of Amsterdam, Department of Psychology, Amsterdam, Netherlands

Background Feigning or over reporting of psychological symptoms is relatively common in patient samples across different settings. Symptom validity questionnaires can be used to detect response bias. However, some of these questionnaires contain quite atypical or even bizarre symptom descriptions that may be too obvious to sophisticated malingerers. The ADI (Mogge and Lepage, 2004) is a self-rating depression questionnaire (Dep), and it also contains a symptom validity scale (Mal), a random responding scale (Rd), and a consistency scale (Rel).

Table 1 Demografic Data and Test Scores for Controls, Instructed Simulators, Depressed Patients and Disability Claimants (n=247) Controls

Age

N=175 44,6 (19.6)

Cognitive simulators N=8 61.7 (8.6)

Depressed simulators N=29 44.1 (14.3)

Depressed Patients N=23 44 (11.4)

Disability claimants N=12 49.3 (8.22)

Range:

18-88

47-78

22-70

20-57

30-61

Female (%)

60 %

88%

66 %

65 %

17 %

P