Quality of Life Questionnaire (QOL - Schalock)

Overview

Purpose

To measure the quality of life of people with IDD

Administration Method

Interview

Administration Mode

In-person

0

Population

Intellectual and Developmental Disability

Instrument Citation(s)

Psychometric Citations

• Phase 1 focus group to sort out, categorize items using focus group. Phase 2: using survey method, 28 , self reported expert, rated the items by appropriateness and feasibility. Except for this validity self reported expert, I could not find any other type of validity, nor reliability

  Type of Publication

  Peer review

  Instrument Language

  Spanish, Spanish (Mexican); QXQ English

  Sample: Age (Mean and Range)

  range between 18-76 (average 38) QXQ: range between 18 to 76 (mean=38) for the physical disability group and 22 to 40 for the ID group

  Sample: Age Group

  18-64, 65 + Years

  Sample: Countries/State

  Spain, Mexico

  Sample: Disability Type

  Intellectual and Developmental Disability, Physical Disability, Mental Health Challenges, Other

  Sample: Gender (%male)

  Mexican study 59.8% -- Spanish Study 66.3% QXQ: I would write this as Study 1(physical disability group) 59.8%; study 2 (ID group) 66.3%

  Sample: Race/Ethnicity (%)

  Not Reported

  Sample: Sampling Strategy

  Convenience Sample

  Sample: Size

  209 (mexican with physical disabilities) - 424 (spanish with ID)

  Reliability: Internal Consistency

  Cronbach's Alpha Competence/productivity (α=.91 - Mexico) (α=.91 - Spain)
  Cronbach's Alpha Satisfaction (α=.84 - Mexico) (α=.70 - Spain)
  Cronbach's Alpha Empowerment/independence (α=.84 - Mexico) (α=.69 - Spain)
  Cronbach's Alpha Social belonging/community integration (α=.71 - mexico) (α=.62 - Spain)

  Validity: Construct (Convergent and Discriminant)

  Mexico /study 1 EFA: validity, data resulting from the factor
  analysis suggest that four dimensions (Competence/
  productivity, Satisfaction, Empowerment/independence
  and Social belonging) represented the best fit. Correlations among factors converge
  with theoretical assumptions, which postulate
  that the factors are interrelated. Low-medium relations
  between sub-scales (from 0.32 to .60,P<0.1), and moderate correlations with total were
  found (from 0.65 to 0.81). Study 2 / Spain Correlations among factors
  converged with theoretical assumptions, given the
  low inter-factor correlations (from 0.13 to 0.36) and
  the medium–moderate factor-total correlations (from
  0.53 to 0.77; P < 0. 01).

  Study design

  Cross-Sectional

• Rapley, M., Ridgway, J., & Beyer, S. (1997). Staff:staff and staff:client reliability of the Schalock & Keith
  (1993) Quality of Life Questionnaire, Journal of Intellectual Disability Research, 42(1), 37-42.

  Type of Publication

  Peer review

  Instrument Language

  English (British)

  Sample: Age (Mean and Range)

  range from 35 to 65 years

  Sample: Age Group

  18-64 Years

  Sample: Countries/State

  England

  Sample: Disability Type

  Intellectual and Developmental Disability, Proxies

  Sample: Gender (%male)

  Not Reported

  Sample: Race/Ethnicity (%)

  Not Reported

  Sample: Sampling Strategy

  Convenience Sample

  Sample: Size

  66 (13 clients)

  Reliability: Inter-rater

  Staff:staff reliability : all values were high with significance achieved -- Satisfaction .88; competence .83; Empowerment .88; social belonging .83; total .89 ___Staff:client: all values were high with significance achieved EXCEPT Empowerment -- Mean staff results Satisfaction .77; competence .65; Empowerment -.43 (non sig); social belonging .71; total .82

  Study design

  Cross-Sectional

• Kober, R., & Eggleton, I.R.C. (2002). Factor stability of the Schalock and Keith (1993) Quality of Life
  Questionnaire. Mental Retardation, 40(2), 157-165.

  Type of Publication

  Peer review

  Instrument Language

  English (Australian)

  Sample: Age (Mean and Range)

  median=22 years (range from 17 to 64)

  Sample: Age Group

  18-64 Years

  Sample: Countries/State

  Australia

  Sample: Disability Type

  Intellectual and Developmental Disability

  Sample: Gender (%male)

  63%

  Sample: Race/Ethnicity (%)

  Not Reported

  Sample: Sampling Strategy

  Convenience Sample

  Sample: Size

  172

  Reliability: Internal Consistency

  Cronbach's Alpha Satisfaction and Domestic
  Contentment (α=.47); Cronbach's Alpha Competence/productivity (α=.91); Cronbach's Alpha Empowerment/Independence (α=.75); Cronbach's Alpha Social Belonging/
  Community Integration being (α=.68)

  Study design

  Cross-Sectional