title: myTREEHOUSE Self-Concept Assessment: preliminary psychometric analysis of a new self-concept assessment for children with cerebral palsy.
abstract: OBJECTIVE
  To evaluate the preliminary validity and reliability of the myTREEHOUSE Self-Concept Assessment for children with cerebral palsy (CP) aged 8 to 12 years.
  
  
  METHODS
  The myTREEHOUSE Self-Concept Assessment includes 26 items divided into eight domains, assessed across three Performance Perspectives (Personal, Social, and Perceived) and an additional Importance Rating. Face and content validity was assessed by semi-structured interviews with seven expert professionals regarding the assessment construct, content, and clinical utility. Reliability was assessed with 50 children aged 8 to 12 years with CP (29 males, 21 females; mean age 10y 2mo; Gross Motor Function Classification System [GMFCS] level I=35, II=8, III=5, IV=1; mean Wechsler Intelligence Scale for Children - Fourth Edition [WISC-IV]=104), whose data was used to calculate internal consistency of the scale, and a subset of 35 children (20 males, 15 females; mean age 10y 5mo; GMFCS level I=26, II=4, III=4, IV=1; mean WISC-IV=103) who participated in test-retest reliability within 14 to 28 days.
  
  
  RESULTS
  Face and content validity was supported by positive expert feedback, with only minor adjustments suggested to clarify the wording of some items. After these amendments, strong internal consistency (Cronbach's α 0.84-0.91) and moderate to good test-retest reliability (intraclass correlation coefficient 0.64-0.75) was found for each component.
  
  
  CONCLUSIONS
  The myTREEHOUSE Self-Concept Assessment is a valid and reliable assessment of self-concept for children with CP aged 8 to 12 years.
authors.affiliation: School of Psychology, Australian Catholic University, Banyo, Qld, Australia.
authors.forename: Sau Kuan
authors.initials: SK
authors.lastname: Cheong
authors.affiliation: School of Psychology, Australian Catholic University, Banyo, Qld, Australia.
authors.forename: Cathryne P
authors.initials: CP
authors.lastname: Lang
authors.affiliation: School of Psychology & Learning Sciences Institute Australia, Australian Catholic University, Melbourne, Vic., Australia.
authors.forename: Sheryl A
authors.initials: SA
authors.lastname: Hemphill
authors.affiliation: School of Health and Rehabilitation Sciences, The University of Queensland, Brisbane, Qld, Australia.
authors.forename: Leanne M
authors.initials: LM
authors.lastname: Johnston
mesh_terms: D001315:Australia; D002547:Cerebral Palsy / Q000175:diagnosis / Q000523:psychology*; D002648:Child; D005260:Female; D006801:Humans; D007407:Interviews as Topic; D008297:Male; D017060:Patient Satisfaction; D011581:Psychological Tests; D011594:Psychometrics; D015203:Reproducibility of Results; D012649:Self Concept