»Ich hab' doch keine geistige Behinderung - ich sitze ja nicht im Rollstuhl« Wege und Schwierigkeiten, Jugendliche nach dem Vorliegen einer »Behinderung« zu fragen.

Operationalizing»disability«presents researcherswith a number of challenges: criteriamust be defined, the relevance of legal institutions must be reflected, and the questions posed to survey participants must ultimately be answerable, especially when surveys address people with various disabilities. This paper begins with an analysis of the strategies currently adopted by researchers and then focuses in particular on an approach which is oriented to the lifeworld of survey participants. To this end, young people with disabilities were invited to take part in focus groups and individual interviews in which they were able to discuss and evaluate various dimensions of »disability«: these included disabled person's ID cards, selfperception, physical functions and impairments, classifications based on medical-diagnostic terminology, the use of assistive devices and personal experiences of barriers. The ensuing discussion explores the young interviewees' reactions to these dimensions, their preferences, the relative ease of answering questions targeting the various dimensions, andways of drawing connections between the dimensions in order to develop an empirically differentiatedmodel of disability. The paper concludes by indicating promising combinations of dimensions in the operationalization of disability and by arguing that much insight stands to be gained when researchers adopt a multidimensional approach to »disability«. [ABSTRACT FROM AUTHOR]