Current instruments for measuring the attitudes towards peers with disabilities do not differentiate between different forms of handicap. They also don’t ask for the students understanding of disability. In addition, they don’t measure the attitudes towards other groups, such as peers of other origins, or from difficult socio-economic conditions. An instrument was designed to measure differentiated attitudes towards diverse groups of peers. Reported are the results of a study with 428 students from grades 5 to 10. In a randomized subsample the items constructed to measure the attitudes towards different groups of peers underwent an Exploratory Factor Analysis (EFA). On the basis of the second subsample a Confirmatory Factor Analysis (CFA) was conducted for a cross-validation of the model that was created in the EFA. Reported are the results of both factor analyzes and thereon based analyzes of variance. The study revealed a structure with three factors: "Attitudes towards peers with disabilities" (factor 1), "Attitudes towards peers of other origins" (factor 2) and "Attitudes towards peers with difficult socio-economic background" (factor 3). Reported are the results of the different factor analyses, the analyses of reliability and validity.

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