title: Sensory clusters of toddlers with autism spectrum disorders: differences in affective symptoms.
abstract: BACKGROUND
  Individuals with autism spectrum disorders (ASDs) show variability in their sensory behaviors. In this study we identified clusters of toddlers with ASDs who shared sensory profiles and examined differences in affective symptoms across these clusters.
  
  
  METHODS
  Using cluster analysis 170 toddlers with ASDs were grouped based on parent rating of the Infant Toddler Sensory Profile (Dunn, 2002) under-responsivity, over-responsivity, and seeking scales. Affective symptoms were evaluated with the Infant Toddler Social Emotional Assessment (Carter & Briggs-Gowan, 2005).
  
  
  RESULTS
  Three clusters were identified: (1) low frequency of sensory symptoms (n = 44); (2) high frequency of symptoms (n = 49); and (3) mixed (n = 77); high frequency of under-and over-responsivity and low frequency of seeking). Relative to the low frequency cluster, parents rated toddlers in the high frequency and mixed clusters (both characterized by high frequencies of sensory under- and over-responsivity) as higher on negative emotionality, depression, and anxiety symptoms. Sensory and affective differences among clusters remained after co-varying severity of ASD symptoms.
  
  
  CONCLUSIONS
  Interdisciplinary assessments are recommended for toddlers with ASDs in order to identify the interplay of sensory and affective symptoms.
authors.affiliation: Department of Occupational Therapy, University of Haifa, Haifa, Israel. ayelet@bu.edu
authors.forename: A
authors.initials: A
authors.lastname: Ben-Sasson
authors.forename: S A
authors.initials: SA
authors.lastname: Cermak
authors.forename: G I
authors.initials: GI
authors.lastname: Orsmond
authors.forename: H
authors.initials: H
authors.lastname: Tager-Flusberg
authors.forename: M B
authors.initials: MB
authors.lastname: Kadlec
authors.forename: A S
authors.initials: AS
authors.lastname: Carter
mesh_terms: D001321:Autistic Disorder / Q000175:diagnosis* / Q000453:epidemiology*; D002675:Child, Preschool; D016000:Cluster Analysis; D005260:Female; D006801:Humans; D007223:Infant; D007858:Learning; D008297:Male; D019964:Mood Disorders / Q000175:diagnosis* / Q000453:epidemiology* / Q000523:psychology; D012720:Severity of Illness Index; D011795:Surveys and Questionnaires