Masking, social context and perceived stress in autistic adults: An ecological momentary assessment study.

Masking may entail the suppression of autistic traits by autistic individuals. Thus far, research indicates a negative impact of autistic masking on mental health, but this is largely based on retrospective surveys. In this study, we used ecological momentary assessment to examine real-time associations between social context (i.e. presence of (non-)autistic others), masking, and perceived stress in everyday life among a sample of autistic adults. Ecological momentary assessment data were collected via a smartphone application for 87 autistic individuals (58 females; age = 48; age range: 17-68). In line with the hypotheses, repeated measures analyses of variance and linear mixed models indicated that (1) participants reported masking significantly less when they were alone compared with when others were present, (2) participants masked significantly more when non-autistic others were present compared with autistic others, and (3) more masking was associated with a concurrent higher level of perceived stress. Autistic adults reported they could be more themselves among autistic peers and reduced masking was associated with reduced stress. These ecological momentary assessment study findings provide ecological validity to the potential stressful impact of masking in the daily lives of autistic adults.Lay abstractAutistic people may try to hide their autistic traits in order to fit in. This is called autistic masking. Survey research suggests that autistic masking may have a negative effect on the mental well-being of autistic people. Yet, survey research has limitations, because people may not remember or may not accurately report how much they masked and how they felt in the past. Therefore, in this study, we asked autistic adults to use a smartphone app to report with whom they were (with or without autistic people), if they could be themselves (degree of masking), and how stressed they felt during the past 4 h. Participants reported this information multiple times over a period of 28 days. In total, 87 autistic adults participated (58 females; age range: 17-68). In line with our expectations, (1) participants masked less when they were alone compared with when others were present, (2) participants masked more when non-autistic others were present compared with autistic others, and (3) more masking was linked with the experience of more stress in the same moment. Autistic adults reported they could be more themselves among other autistic individuals. Also, less masking was associated with less stress. Our study shows the everyday reality of stress during masking experienced by autistic adults.