title: Early socio-communicative forms and functions in typical Rett syndrome.
abstract: Rett syndrome (RTT) is a severe neurological disorder characterized by a developmental regression in motor and speech-language domains. There is, however, limited research on socio-communicative development of affected children before the onset of regression. We analyzed audio-video recordings made by parents of six 9- to 12-month old girls later diagnosed with typical RTT, applying the Inventory of Potential Communicative Acts (IPCA) to identify early communicative forms and functions. Each girl used at least one communicative form (e.g., body movement, eye gaze, or vocalizations) to gain attention and answer, but none were observed to make choices or request information. Varying numbers of children were observed to perform other communicative functions according to the IPCA including social convention, rejecting or requesting an object. Non-verbal forms (e.g., reaching, moving closer, eye contact, smiling) were more common than non-linguistic verbal forms (e.g., unspecified vocalizations, pleasure vocalizations, crying). (Pre-)linguistic verbal forms (e.g., canonical or variegated babbling, proto-words) were not used for communicative purposes. These data suggest that atypical developmental patterns in the socio-communicative domain are evident prior to regression in young individuals later diagnosed with RTT.
authors.affiliation: Institute of Physiology (Research Unit iDN-interdisciplinary Developmental Neuroscience; IN:spired), Center for Physiological Medicine, Medical University of Graz, Austria.
authors.forename: Katrin D
authors.initials: KD
authors.lastname: Bartl-Pokorny
authors.forename: Peter B
authors.initials: PB
authors.lastname: Marschik
authors.forename: Jeff
authors.initials: J
authors.lastname: Sigafoos
authors.forename: Helen
authors.initials: H
authors.lastname: Tager-Flusberg
authors.forename: Walter E
authors.initials: WE
authors.lastname: Kaufmann
authors.forename: Tobias
authors.initials: T
authors.lastname: Grossmann
authors.forename: Christa
authors.initials: C
authors.lastname: Einspieler
mesh_terms: D003142:Communication; D003147:Communication Disorders / Q000175:diagnosis / Q000523:psychology*; D002658:Developmental Disabilities / Q000175:diagnosis / Q000523:psychology*; D005260:Female; D006801:Humans; D007223:Infant; D018730:Infant Behavior / Q000523:psychology*; D009633:Nonverbal Communication; D012189:Retrospective Studies; D015518:Rett Syndrome / Q000175:diagnosis / Q000523:psychology*; D012919:Social Behavior; D014705:Verbal Behavior; D014743:Videotape Recording
keywords: Family videos; Home videos; Infants; Retrospective analysis; Rett syndrome; Socio-communicative development; Video analysis
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