It's 25 years since we redefined autism – here's what we've learnt
- Written by Andrew Whitehouse, Bennett Chair of Autism, Telethon Kids Institute, University of Western Australia
 
The frequency and intensity of repetitive behaviours vary between mild and severe, which is why it's called a spectrum.Dubova/ShutterstockIt’s 25 years since the fourth edition of the Diagnostic and Statistical Manual (DSM-IV) was published. The manual is the clinical “bible” that defines the criteria for the diagnosis of...
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