Initial validation of the Brief Assessment of Service Satisfaction in Persons with an Intellectual Disability (BASSPID)

•The BASSPID assesses satisfaction in individuals with an intellectual disability.•The BASSPID contains 15 items scored on a 3-point scale and 2 open-ended questions.•The results suggest that the BASSPID has adequate validity and reliability.•Parents generally overestimated the perceived satisfaction of their child.•The BASSPID may be used to compare services and to measure progress over time. Individuals with an intellectual disability often require intensive services to promote their social participation to the fullest extent. As such, measuring satisfaction with these services appears essential to enhance the quality of life of individuals with an intellectual disability and to improve service delivery within agencies. Thus, the purpose of the study was to conduct an initial validation of the Brief Assessment of Service Satisfaction in Persons with an Intellectual Disability (BASSPID), a 15-item questionnaire designed to assess service satisfaction. To examine the structure, reliability, and validity of the BASSPID, we interviewed 98 individuals with an intellectual disability and 23 parents. Overall, the BASSPID contained one scale, which had strong content and convergent validity as well as items easily understandable for individuals with an intellectual disability. Furthermore, the questionnaire had good internal consistency and adequate test-retest reliability. However, parents generally overestimated the perceived satisfaction of their child. The study suggests that the BASSPID may be useful to assess the satisfaction of individuals with an intellectual disability, but more research is needed to examine its potential impact on improving service quality.