Monotropism is a cognitive strategy posited to be the central underlying feature of autism. A monotropic mind is one that focuses its attention on a small number of interests at any time, tending to miss things outside of this attention tunnel. The theory of monotropism was developed by Dr Dinah Murray, Wenn Lawson and Mike Lesser starting in the 1990s, and published about in the journal Autism in 2005. Wenn Lawson's further work on the theory formed the basis of his PhD, Single Attention and Associated Cognition in Autism, and book The Passionate Mind (Lawson, 2011).