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Recent research on executive function (EF) deficits in autism has led investigators to conclude that EF deficits are secondary to the disorder. The current study has two major goals: (1) Examine whether specific EF deficits are present in the youngest autism group to date (mean = 22.9 years), and (2) examine whether such deficits are secondary to autism, or act as an early non-specific cognitive risk factor for autism by comparing EF abilities of this autism group to a CA-matched typically developing group. Results from Experiment 1 suggest no specific EF deficits in autism relative to MA-matched controls, while results from Experiment 2 are consistent with the hypothesis that EF deficits may emerge as a secondary deficit in autism. Alternative hypotheses are also considered.

Visual perception may be a developmental prerequisite to some types of social understanding. The ability to perceive social information given visual motion appears to develop early. However, children with autism have profound deficits in social cognitive function and may fail to see social motion in the same way that typically developing children do. We tested the hypothesis that children with autism fail to discriminate animate motion, using a novel paradigm involving simple geometric figures. The subjects were 23 children with autism (c.a. 70.7 mos.), 18 children with other developmental disabilities (c.a. 68.2 mos.), and 18 typically developing children (c.a. 46.4 mos.). Children saw two circles moving on a screen and were rewarded for identifying the one that moved as if animate. A control condition required children to identify the heavier of two objects. Children with autism initially showed a deficit in categorizing objects as animate (though no deficit on the control task), but showed no deficit in this ability after they had reached criterion in the training phase. These results are discussed in terms of the social orienting theory of autism, and the possibility that animacy perception might be preserved in autism, even if it is not used automatically.

The profile of spatial ability is of interest across autism spectrum disorders (ASD) because of reported spatial strengths in ASD and due to the recent association of Asperger's syndrome with Nonverbal Learning Disability. Spatial functions were examined in relation to two cognitive theories in autism: the central coherence and executive function (EF) theories. Performance on spatial tasks, EFs, and global/local processing was compared in children with ASD and controls. While the ASD group had faster reaction times on the Embedded Figures task, spatial performance was intact, but not superior, on other tasks. There was no evidence for impairments in EF or in processing global/local information, therefore contradicting these two theories. The implications of these results for these two theories are discussed.

Evaluation of social-cognitive skills in 23 young children with autism or other developmental delays found tests involving others' attention were more difficult for children with autism than tests involving others' behavior. However, the typical developmental pattern of first sharing, then following, and then directing attention or behavior was evident. Some intercorrelations among social-cognitive skills were found. (Contains references.) (Author/DB)

This study examined the understanding of others' intentions in 21/2- to 5-year-old children with autism and a control group of children with other developmental delays. No significant between-group differences were found, although within-group patterns suggested that children with autism may have a slightly less complex understanding of others' intentions than do other children. (Contains references.) (Author/DB)