Understanding differences in neurotypical and autism spectrum special interests through Internet forums.
Adults with autism post more, deeper, and more systemizing hobby talk online—mine their forums to personalize therapy.
01Research in Context
What this study did
Jordan et al. (2012) read thousands of public forum posts written by adults with autism and by neurotypical adults. They counted how many special interests each group talked about and how detailed the posts were.
The team used simple text mining. No surveys. No lab visits. Just real words people typed about their hobbies.
What they found
Adults with autism listed more hobbies. Their posts were longer and more specific. They also talked about systemizing topics like trains, maps, or schedules far more often than the neurotypical writers.
The pattern was strong enough to spot by computer. The data gave a free, natural picture of adult interests.
How this fits with other research
Grove et al. (2016) built on this finding. They made the 20-item Special Interest Motivation Scale. Adults with autism again scored higher on joy, flow, and drive, showing the extra interests are also more loved.
Dudley et al. (2019) added eye-tracking. When pictures of special interests popped up, adults with autism showed quicker pupil changes and gave less effort than when social photos appeared. The forum result now has a body response to back it.
Rivard et al. (2018) looked at teenagers, not adults. EEG showed no extra brain 'late-positive potential' for special-interest photos in ASD teens. That sounds like a clash, but the kids were younger. Interests may grow stronger with age, so both papers can be true.
Why it matters
You can treat forum posts as free assessment data. If an adult client keeps long posts about bus routes, use that topic to build rapport and craft rewards. When writing goals, borrow language straight from their posts to keep motivation high. Also, remember that teens might not show the same intense profile yet—keep checking each year.
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02At a glance
03Original abstract
Special interests are frequently developed by individuals with autism spectrum disorder, expressed as an intense focus on specific topics. Neurotypical individuals also develop special interests, often in the form of hobbies. Although past research has focused on special interests held by children with autism spectrum disorder, little is known about their role in adulthood. The current study investigated differences in the content, number, and specificity of the special interests held by adult individuals with autism spectrum disorder and neurotypical individuals, using Internet discussion forums as a data source. Quantitative analysis of forum posts revealed significant differences between the diagnostic groups. Individuals with autism spectrum disorder reported having more interests in systemizing domains, more specific interests, and a greater number of interests overall than neurotypical individuals. Understanding special interests can lead to the development of educational and therapeutic programs that facilitate the acquirement of other important social and communication skills.
Intellectual and developmental disabilities, 2012 · doi:10.1352/1934-9556-50.5.391