title: Developmental trajectories of respiratory sinus arrhythmia: associations with social responsiveness.
abstract: The present longitudinal study examined relations between respiratory sinus arrhythmia (RSA) development and social responsiveness characteristics associated with autism spectrum disorders. Group-based developmental trajectory modeling was used to characterize RSA development patterns in 106 typically developing children across 5, 10, 24, 36, and 48 months of age. A two-group model fit of RSA development was found: a "typically" and "atypically" developing group. The typical group gradually increased in RSA across 5-48 months of age. The atypical group, however, increased in RSA from 5 to 24 months and demonstrated a plateau or "delay" in RSA development from 24 to 48 months. The atypical RSA development group also demonstrated more difficulties in parent-reported social responsiveness at 48 months. The results support current literature that identifies RSA as a marker of social functioning level.
authors: Department of Psychology, Virginia Tech, Blacksburg, VA, 24061.
authors: Michelle A
authors: MA
authors: Patriquin
authors: Jill
authors: J
authors: Lorenzi
authors: Angela
authors: A
authors: Scarpa
authors: Martha Ann
authors: MA
authors: Bell
mesh_terms: D002657:Child Development / Q000502:physiology*; D002659:Child Development Disorders, Pervasive / Q000175:diagnosis* / Q000503:physiopathology / Q000523:psychology; D002675:Child, Preschool; D005260:Female; D006339:Heart Rate / Q000502:physiology*; D006801:Humans; D007223:Infant; D008137:Longitudinal Studies; D008297:Male; D056152:Respiratory Rate / Q000502:physiology*; D012917:Social Adjustment; D012938:Social Perception; D011795:Surveys and Questionnaires
keywords: autism; childhood; developmental trajectory; longitudinal; respiratory sinus arrhythmia; social