title: The eye-tracking of social stimuli in patients with Rett syndrome and autism spectrum disorders: a pilot study.
abstract: OBJECTIVE
  To compare visual fixation at social stimuli in Rett syndrome (RT) and autism spectrum disorders (ASD) patients.
  
  
  METHODS
  Visual fixation at social stimuli was analyzed in 14 RS female patients (age range 4-30 years), 11 ASD male patients (age range 4-20 years), and 17 children with typical development (TD). Patients were exposed to three different pictures (two of human faces and one with social and non-social stimuli) presented for 8 seconds each on the screen of a computer attached to an eye-tracker equipment.
  
  
  RESULTS
  Percentage of visual fixation at social stimuli was significantly higher in the RS group compared to ASD and even to TD groups.
  
  
  CONCLUSIONS
  Visual fixation at social stimuli seems to be one more endophenotype making RS to be very different from ASD.
authors.affiliation: Universidade Presbiteriana Mackenzie, São Paulo, SP, Brasil.
authors.forename: José Salomão
authors.initials: JS
authors.lastname: Schwartzman
authors.affiliation: Clínica de Transtornos do Espectro do Autismo, Universidade Presbiteriana Mackenzie, São Paulo, SP, Brasil.
authors.forename: Renata de Lima
authors.initials: Rde L
authors.lastname: Velloso
authors.affiliation: Universidade Presbiteriana Mackenzie, São Paulo, SP, Brasil.
authors.forename: Maria Eloísa Famá
authors.initials: ME
authors.lastname: D'Antino
authors.affiliation: Associação Brasileira de Síndrome de Rett de São Paulo, São Paulo, SP, Brasil.
authors.forename: Silvana
authors.initials: S
authors.lastname: Santos
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000704:Analysis of Variance; D002648:Child; D002659:Child Development Disorders, Pervasive / Q000503:physiopathology*; D002675:Child, Preschool; D005123:Eye / Q000503:physiopathology*; D005145:Face; D005260:Female; D005403:Fixation, Ocular / Q000502:physiology*; D006801:Humans; D008297:Male; D010865:Pilot Projects; D015518:Rett Syndrome / Q000503:physiopathology*; D012938:Social Perception; D013997:Time Factors; D014796:Visual Perception / Q000502:physiology*; D055815:Young Adult