title: Acceptability and Reliability of the Bayley Scales of Infant Development III Cognitive and Motor Scales among Children in Makwanpur.
abstract: BACKGROUND
  The Bayley Scales of Infant Development III (BSID III) is an instrument to measure the development of children aged 1-42 months. Our study sought to assess the feasibility and reliability of the BSID III's cognitive and motor sub-scales among children in rural Nepal.
  
  
  METHODS
  For this study, translation and back translation in Nepali and English for cognitive and motor sub-scale of BSID III were done. Two testers assessed a total of 102 children aged 1-42 months and were video-recorded and rescored by the third tester. Raw scores were calculated for each assessment. Inter and intra-observer reliability of scores across the three testers was examined. Raw score was converted into scaled score to examine the mean score. The study received ethical clearance from NHRC.
  
  
  RESULTS
  A total of 102 children were assessed. The inter-rater reliability of the BSID III among three testers using the Intraclass Correlation Coefficient by age group was 0.997 (95% CI: 0.996-0.998) for the cognitive scale, 0.997 (95% CI: 0.996- 0.998) for the gross motor scale, and 0.998 (95% CI: 0.997- 0.999) for the fine motor scale. All were statistically significant (p< 0.0001). The mean scaled cognitive, fine motor and gross motor development scores in this group of children were 8.3 (SD: 2.5), 8.5 (SD: 2.6) and 9.5 (3.2), respectively.
  
  
  CONCLUSIONS
  Assessing the cognitive and motor development of children under five using the BSID III was feasible in Makwanpur district, Nepal. The inter-rater reliability was highly comparable among the three testers.
authors.affiliation: Department of Pediatrics, Kathmandu Medical College Teaching Hospital, Nepal.
authors.forename: S R
authors.initials: SR
authors.lastname: Manandhar
authors.affiliation: Mother and Infant Research Activities (MIRA), Kathmandu, Nepal.
authors.forename: S
authors.initials: S
authors.lastname: Dulal
authors.affiliation: Mother and Infant Research Activities (MIRA), Kathmandu, Nepal.
authors.forename: D S
authors.initials: DS
authors.lastname: Manandhar
authors.affiliation: Centre for International Health and Development, UCL, London, UK.
authors.forename: N
authors.initials: N
authors.lastname: Saville
authors.affiliation: Centre for International Health and Development, UCL, London, UK.
authors.forename: A
authors.initials: A
authors.lastname: Prost
mesh_terms: D002657:Child Development; D002675:Child, Preschool; D003071:Cognition; D005240:Feasibility Studies; D005260:Female; D006801:Humans; D007223:Infant; D008297:Male; D009048:Motor Skills / Q000502:physiology*; D009390:Nepal; D009460:Neurologic Examination / Q000295:instrumentation* / Q000592:standards*; D015203:Reproducibility of Results; D012424:Rural Population
keywords: Bayley scale of infant development (BSID); inter and intra -observer reliability.