An international validation of the interaction with disabled persons scale

The Interaction with Disabled Persons Scale (IDP) was devised to measure attitudes in terms of discomfort reported about social interaction with people with disabilities. The Scale has been used in Australia for ten years. This article reports results of an international validation project that was designed to determine whether psychometric characteristics and norms emerging for Australian groups apply elsewhere. A methodological proforma was developed to maximize uniformity of data collection across nine countries: Australia, Canada, Croatia, England, Germany, Hong Kong, Poland, Scotland and the United States. In most countries the Scale was administered in English; however it also was translated into Germany, Polish, French and Croat. Results indicate that across countries mean scores fell within ten points, similar moderate to high levels of item homogeneity occurred and level of prior contact with people with disabilities emerged as the strongest predictor of IDP scores. It was concluded that the IDP Scale is a valid measure that is able to discriminate between respondents within the countries included in the study.