[Relationship of screening and differential diagnosis--a critical study of methods exemplified by the psychologic-neurologic questionnaire and a diagnostic psychologic follow-up program].

Considering the necessity to examine the utility of screening tests in the field the results of the Psychological-neurological Questionnaire and a specific neurotoxic test battery were compared. The statistical analysis with crosstables and discrimant analysis showed satisfying classification results. To increase the sensitivity of the screening test procedure it is necessary to include performance tests.