To start with, let’s answer the first big question: Why use a robot in autism therapy?
People with autism have an attention preference to objects over people
(Kerola et al., 2009), and children with autism have shown more interest
toward therapy when it involves technological or robotic components
(Robins et al., 2006). Additionally, a robot’s operation can be strictly
controlled, which can make therapy less overwhelming for autistic
people (Kozima et al., 2009).
An interesting paper....
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https://towardsdatascience.com/could-robots-teach-sign-language-to-children-with-autism-8a6d7c3eb23a