This paper goes into some of the advantages and problems of international collaboration in developing measurement instruments for Assistive Technology outcome assessment. It results in a strong plea for developing an international network of researchers and institutes, together developing a common research agenda for this field. By joining the efforts in different countries, the quality of outcome measurement in Assistive Technology is likely to improve and the use of good instruments to increase. As a result, the (quality of) knowledge about the effectiveness of Assistive Technology will increase, which will contribute to the quality of Assistive Technology provision and service delivery.
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