R. Brockhaus

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OBJECTIVE This study used the Medical Symptom Validity Test (MSVT) to examine exaggeration of memory impairment in disability claimants. METHODS The MSVT was administered to patients with soft tissue injuries undergoing an independent medical examination (IME). Their results were compared with those from groups of volunteers who were either trying their(More)
By definition, false positives occur when an otherwise very easy symptom validity test (SVT) or effort test is failed because of cognitive impairment and not because of poor effort. Therefore, the highest rate of false positives will be found in those groups with the most severe cognitive impairment. For that reason, it is important to study people with(More)
Although malingering, suboptimal cognitive performance, and negative response bias represent very problematic confounds in diagnostic work with a number of neurological and some psychiatric illnesses, the evaluation of these tendencies has not yet become common practice in German-speaking countries. Only a limited number of adequately validated instruments(More)
Islet cell antibodies were investigated in 127 non-diabetic children after mumps infection and in four out of seven children who developed diabetes mellitus shortly after active mumps vaccination. Twenty-one of the children who had mumps and all four vaccinated children who were tested had islet cell cytoplasmic antibodies. In contrast, islet cell surface(More)
The detection of islet cell antibodies has led to an increasing interest in autoimmune mechanisms in Type I diabetes mellitus. Other phenomena, such as insulitis in juvenile diabetics and in experimental animals, cellular immune reactions and concommitant antibodies against other endocrine organs, antinuclear antibodies and circulating immune complexes have(More)
Although symptom validity testing is an integral part of the repertory of neuropsychologists in a number of countries, this is not yet true for Germany. The German adaptations of two effort tests, the Medical Symptom Validity Test (MSVT) by Green and the Amsterdam Short-Term Memory Test (ASTM) by Schmand et al., were investigated with a German-language(More)
The Rey Complex Figure Test is a neuropsychological instrument that can be employed in different cultural backgrounds. Meyers and Meyers (1995) proposed an extended test version including a Recognition Trial (RT), which permits an examination of test motivation through analyses of test profiles and rare recognition mistakes. In the present study, data from(More)