People with autism often face mental health difficulties at rates far exceeding those of the general population. How autistic individuals relate to their autism classification and the autistic community, also known as social identity, may form a protective factor for mental health. However, validated tools to assess social identity in autistic populations are lacking. This study aims to evaluate the Dutch version of the 14-item Social Identity in Autism Questionnaire (SIAQ) and examine associations between social identity and demographic, autism-related, and mental health variables. A total of 1443 autistic individuals from the Netherlands (mean age = 47 years, 54% women, 98% Dutch) completed the SIAQ and measures assessing demographics, autism characteristics, and mental health. Factor analyses revealed a four-factor structure: solidarity (three items, feelings of connection to people with autism), satisfaction (four items, positive feelings about being autistic), centrality (three items, the importance of autism to one's sense of self), and self-definition (four items, perceived similarity to other autistic people and within the autistic community). Internal consistency was acceptable to excellent. Measurement invariance (scalar level) was found across age, gender, education level, ethnicity, and autism traits. Furthermore, the four factors of social identity were differentially related to age, gender, language preference, time since diagnosis, and autism traits. Higher satisfaction and lower centrality were related to better mental health. To conclude, the SIAQ forms a robust tool to assess social identity in autistic individuals in the Netherlands.Lay AbstractPeople with autism experience mental health challenges much more often than people in the general population. Understanding how autistic people relate to their autism and the autistic community - called autistic social identity - may form an important factor for mental health. However, the lack of reliable tools to measure social identity in autistic people led to this study evaluating the Dutch version of the Social Identity in Autism Questionnaire (SIAQ). Associations between social identity and demographics, autism traits, and mental health were studied. Autistic individuals from the Netherlands (n = 1443, average age = 47 years; 54% women; 98% Dutch) completed the SIAQ. The results showed that the questionnaire captures four key aspects of social identity: solidarity (feeling connected to other autistic people), satisfaction (positive feelings about being autistic), centrality (how central autism is to one's identity), and self-definition (seeing oneself as similar to other autistic people and perceiving the autistic community as relatively similar). The questionnaire was reliable as well as suitable to use across diverse groups, including variations in age, gender, education level, ethnicity, and autism traits. Several aspects of social identity were related to gender, age, language preference, time since diagnosis, and autism traits. Importantly, higher satisfaction and lower centrality were associated with better mental health. These findings suggest that in the Netherlands, the SIAQ is a useful tool for understanding how autistic people relate to their autism and the autistic community, and how this relates to wellbeing.
Krijnen et al. (Fri,) studied this question.
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