This secondary analysis examined the impact of respondent-level factors on scores on the Supports Intensity Scale–Adult Version (SIS-A) to determine if there were patterns of differences in SIS-A scores based on the number of respondents and the pairings of respondents that were included in SIS-A interviews. Results indicated that having fewer respondents led to a greater variability in SIS-A scores whereas having more respondents led to higher mean, overall support need scores. When respondents included an adult with intellectual disability (ID) the mean score was significantly lower. However, there were complex influences of pairing an adult with ID with either a professional or family member on SIS-A scores. Implications for administering and using the SIS-A are discussed.