Establishing norms for the Four-Dimensional Symptom Questionnaire (4DSQ) in the Dutch population

The primary aim of the proposed study is to collect 4DSQ data in a large representative Dutch sample of the broadest composition to provide gender, age and social economic strata specific norms for the general Dutch population, including immigrants. The questionnaire is administered to the LISS-immigrant panel (LISS-I). Earlier this year the questionnaire is administered to the LISS panel.