Abstract：
BACKGROUND/AIMS:Despite the advances in understanding visuo-spatial processing in developmental disorders such as ASD and fragile X syndrome (FXS), less is known about the profile of those with a comorbid diagnosis, or the role of within-disorder disparities between individuals across the ASD spectrum. METHODS AND PROCEDURES:Using a developmental trajectory approach, we tested 5 groups of children: Typically developing, FXS, FXS+ASD, ASD individuals who had low-moderate symptoms (HFA) and ASD individuals who had severe symptoms (LFA). Symptoms of ASD were assessed using the Childhood Autism Rating Scale: CARS and hierarchical visuo-spatial processing was assessed using the Navon task. OUTCOMES AND RESULTS:Crucially, results differed between HFA and LFA participants. Furthermore, the pattern of results differed between those who had a diagnosis of FXS only and FXS+ASD. Poorer performance within the FXS groups and the group who are low functioning on the ASD spectrum indicated a delayed developmental rate compared to typical controls. CONCLUSIONS AND IMPLICATIONS:This study showed that diagnosis and severity of symptoms are indicative of differences in visuo-spatial processing styles. It is important that heterogeneity within FXS and ASD populations are considered in subsequent studies and look beyond diagnostic group differences.
journal_name
Res Dev Disabiljournal_title
Research in developmental disabilitiesauthors
Ballantyne CJ,Núñez Mdoi
10.1016/j.ridd.2015.12.016subject
Has Abstractpub_date
2016-04-01 00:00:00pages
103-15eissn
0891-4222issn
1873-3379pii
S0891-4222(15)30038-Xjournal_volume
51-52pub_type
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