Observer reliability of the Gross Motor Performance Measure and the Quality of Upper Extremity Skills Test, based on video recordings

• Published in: Developmental medicine and child neurology 2008-02, Vol.50 (2), p.146-151
• Main Authors: Sorsdahl, Anne Brit, Moe‐Nilssen, Rolf, Strand, Liv Inger
• Format: Article
• Language: English
• Subjects: Adolescent; Algorithms; Cerebral Palsy; Child; Child, Preschool; Correlation; Data Analysis; Elementary Education; Elementary Schools; Female; Humans; Interrater Reliability; Male; Motor Skills; Neuropsychological Tests; Norway; Observer Variation; Outcome Measures; Physical Therapy; Quality Assurance, Health Care; Reproducibility of Results; Resistance (Psychology); Scoring; Statistical Analysis; Teaching Methods; Test Items; Upper Extremity; Validated Programs; Video Technology; Videotape Recorders
• ISSN: 0012-1622; 1469-8749
• DOI: 10.1111/j.1469-8749.2007.02023.x

The aim of this study was to examine observer reliability of the Gross Motor Performance Measure (GMPM) and the Quality of Upper Extremity Skills Test (QUEST) based on video clips. The tests were administered to 26 children with cerebral palsy (CP; 14 males, 12 females; range 2–13y, mean 7y 6mo), 24 with spastic CP, and two with dyskinesia. Respectively, five, six, five, four, and six children were classified in Gross Motor Function Classification System Levels I to V; and four, nine, five, five, and three children were classified in Manual Ability Classification System levels I to V. The children's performances were recorded and edited. Two experienced paediatric physical therapists assessed the children from watching the video clips. Intraobserver and interobserver reliability values of the total scores were mostly high, intraclass correlation coefficient (ICC)1,1 varying from 0.69 to 0.97 with only one coefficient below 0.89. The ICCs of subscores varied from 0.36 to 0.95, finding‘Alignment’and‘Weight shift’in GMPM and‘Protective extension’in QUEST highly reliable. The subscores‘Dissociated movements’in GMPM and QUEST, and‘Grasp’in QUEST were the least reliable, and recommendations are made to increase reliability of these subscores. Video scoring was time consuming, but was found to offer many advantages; the possibility to review performance, to use special trained observers for scoring and less demanding assessment for the children.