Journal
JOURNAL OF AUTISM AND DEVELOPMENTAL DISORDERS
Volume 47, Issue 12, Pages 3741-3755Publisher
SPRINGER/PLENUM PUBLISHERS
DOI: 10.1007/s10803-017-3059-7
Keywords
Fragile X syndrome; Autism spectrum disorder; Stranger fear; Anxiety; Temperament
Categories
Funding
- National Institute of Mental Health [R01MH107573, R01MH0901194]
- National Institute of Child Health and Human Development [P30-HD003110-35S1]
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This study investigated behavioral indicators of social fear in preschool boys with fragile X syndrome (FXS) with a low degree of autism spectrum disorder (ASD) symptoms (FXS-Low; n = 29), FXS with elevated ASD symptoms (FXS-High; n = 25), idiopathic ASD (iASD; n = 11), and typical development (TD; n = 36). Gaze avoidance, escape behaviors, and facial fear during a stranger approach were coded. Boys with elevated ASD symptoms displayed more avoidant gaze, looking less at the stranger and parent than those with low ASD symptoms across etiologies. The iASD group displayed more facial fear than the other groups. Results suggest etiologically distinct behavioral patterns of social fear in preschoolers with elevated ASD symptoms.
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