Quality of life dataset.

This dataset supports the PhD thesis 'Quality of Life, Risks and Resilience in School-Aged Siblings of Autistic Children' by C J Hens. Data was collected online via an online survey platform. It contains demographic information on participants, in addition to participants' completion of psychometric scales measuring psychological wellbeing, school belonging, and quality of life. The data was secondary data, obtained from a previous research study which used data that had not been previously analysed. Further details can be found in the ethical approval application, ERGO number: 56652. The data compares the outcomes on these psychological measures between two groups: adolescent siblings of autistic children and adolescent siblings of neurotypical children.