Prior research demonstrates that understanding theory of mind (ToM) is seriously and similarly delayed in late-signing deaf children and children with autism. Are these children simply delayed in timing relative to typical children, or do they demonstrate different patterns of development? This research tested 145 children (ranging from three to 13 years) with deafness, autism, or typical development using a ToM scale. Results indicate that all groups followed the same sequence of steps, up to a point, but children with autism showed an importantly different sequence of understandings (in the later steps of the progression) relative to all other groups.
Peterson, C C, Wellman, H M and Liu, D, Child Development 76 (2): 502- 517, March 2005. Abstract: www.blackwell-synergy.com
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