“…However, Hare, Jones, and Evershed () reported that sleep measures in a small group of adults with autism and ID did not differ from adults with ID alone. Similarly, cognitively able autistic adults are reported to have increased insomnia symptoms, including increased sleep latency, poor sleep efficiency, shorter night sleep, and advanced or delayed circadian sleep–wake rhythms [Baker & Richdale, ; Baker & Richdale, ; Goldman et al, ; Hare et al, , ; Limoges, Mottron, Bolduc, Berthiaume, & Godbout, ; Tani et al, ). Causes for sleep abnormalities are likely to be multifactorial, such as neurotransmitter abnormalities (e.g., serotonin) [Anderson & Lombroso, ; Malow et al, ), medical problems (e.g., gastrointestinal disorders [Klukowski, Wasilewska, & Lebensztejn, ), epilepsy (Kaleyias et al, ]), psychopathology [Nadeau et al, ; Richdale, Baker, Short, & Gradisar, ] or behavioral etiologies (e.g., poor sleep habits [Malow et al, ; Reynolds & Malow, ]).…”