title: [Filmed sample size and pragmatic analysis in Down syndrome].
abstract: BACKGROUND
  Assessing language development is a complex task that requires practical and theoretical knowledge about the investigated issues. It is also important to take into account data gathering and analysis methodology, in order to achieve consistent and reliable results that mirror the subject's reality.
  
  
  OBJECTIVE
  considering the purpose of obtaining the maximum data in minimum time, without jeopardizing their quality and effectiveness, our aim is to identify the better sample's size and moment of videotaped interaction to study the pragmatic abilities of children with Down syndrome.
  
  
  METHODS
  The communicative profile of 25 children with Down syndrome aged between 2 and 7 years were determined as proposed by Fernandes (2004). Data obtained through samples of 15 and 30 minutes were analyzed and compared. The situation analyzed provided interaction between the child and a speech-and language-therapist in play situations. To determine the statistical significance of data the tests Friedman, Wilcoxon and confidence interval were applied with a significance level of 0.05 (5%).
  
  
  CONCLUSIONS
  There were no significant differences related to the obtained samples with different videotaped duration for pragmatic analysis of the communication of children with Down syndrome.
authors: Faculdade de Medicina, Universidade de São Paulo, Departamento de Fisioterapia, Fonoaudiologia e Terapia Ocupacional, Brazil. portoeliza@yahoo.com.br
authors: Eliza
authors: E
authors: Porto
authors: Suelly Cecilia Olivian
authors: SC
authors: Limongi
authors: Irlaine Guedes dos
authors: IG
authors: Santos
authors: Fernanda Dreux Miranda
authors: FD
authors: Fernandes
mesh_terms: D002648:Child; D002675:Child, Preschool; D003142:Communication; D003147:Communication Disorders / Q000175:diagnosis*; D016001:Confidence Intervals; D004314:Down Syndrome / Q000503:physiopathology*; D005260:Female; D006801:Humans; D007804:Language Development; D007805:Language Development Disorders / Q000175:diagnosis; D007808:Language Therapy; D008297:Male; D011369:Professional-Patient Relations; D015203:Reproducibility of Results; D018401:Sample Size; D018709:Statistics, Nonparametric; D014743:Videotape Recording / Q000379:methods* / Q000592:standards