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This study evaluated the potential of using the Supports Intensity Scale (SIS) for resource allocation for people with intellectual disabilities (ID) in Taiwan. SIS scores were compared with those obtained from three tools that are currently used in Taiwan for homecare services: the medical diagnosis issued by local authorities and two scales measuring Activities of Daily Life (ADL) and Instrumental Activities of Daily Life (IADL). Data were collected on 139 persons with ID aged 16 or older. The correlation between SIS subscales and the other three tools were calculated and compared. Six subscales of the SIS demonstrated adequate reliability and validity and had higher correlations with the IADL than the ADL and medical diagnosis. The results of these analyses suggest that the SIS can be used as a reference tool for resources allocation in this population in Taiwan. (Contains 4 tables.)