Psychometric properties of the Spanish version of the Personal Outcomes Scale

Abstract

Personal outcomes-related quality of life provides information about the impact of individualized supports and services that are provided to people with intellectual disability. The Personal Outcomes Scale (POS) is a valid and reliable instrument that measures these outcomes using two parts, self-report and report by others. Based on the POS, the aim of this study is to provide a new psychometric study of the instrument that allows the evaluation of the three principal informers involved in the enhancement of individual's quality of life: individual with intellectual disability, professional and family member. This approach overcomes the limitations of the POS. For the self-report were involved 529 people with intellectual disability. A professional (N = 522) and a family member (N = 462) separately participated for the report by others versions to assess personal outcomes for each participant. The reliability study provides appropriate values for the first and second order factors with α values being higher than .82. The construct validity analysis provides an adjustment of the theoretical model, particularly regarding the assessments from professionals. Results show this instrument is adequate to evaluate personal outcomes and giving the guidelines for making policy and practice decisions.

A new scale for the measurement of quality of life in children with intellectual disability

“…Exploring alternative factorial models and hierarchical structures is an interesting, productive area that this study represents only the first steps into. It is also an area in which continued investigation is needed to clarify the adequacy of proposed factorial structures with eight first-order domains grouped in three second-order factors (Carbó-Carreté et al, 2015;Gómez et al, 2011;Verdugo et al, 2014;Wang et al, 2010). On the other hand, the KidsLife scale is a great step forward for the development of similar instruments which might suit the possible peculiarities and special needs that can be presented by some subgroups with specific diagnoses.…”

“…In Spain there are various useful instruments for the evaluation of QoL in people with intellectual disability in adulthood and in old age, for example the GENCAT scale (Verdugo, Arias, Gómez, & Schalock, 2010), the FUMAT scale (Verdugo, Gómez, & Arias, 2009), the Quality of Life scale for elderly people with disabilities (Alcedo, Aguado, Arias, González, & Rozada, 2008), the INICO-FEAPS scale Verdugo, Gómez, Arias, Santamaría, Clavero et al, 2013), the San Martín scale (Verdugo, Gómez, Arias, Navas, & Schalock, 2014;Verdugo, Gómez, Arias, Santamaría, Navallas et al, 2013) and the Personal Outcomes Scale (Carbó-Carreté, Guàrdia-Olmos, & Giné, 2015). However, to our knowledge, for infancy and adolescence there are only the CVI-CVIP (Sabeh, Verdugo, Prieto, & Contini, 2009) and the CCVA (Gómez-Vela & Verdugo, 2009).…”

Impact of the intellectual disability severity in the Spanish Personal Outcomes Scale

“…The Spanish version of the POS (Carbó‐Carreté et al . ) aims to assess QoL in Spanish‐speaking persons with ID on the basis of the eight dimensions of the Schalock & Verdugo's () model, which were arranged into three higher‐order factors: independence, social participation and well‐being (Wang et al . ).…”

“…) and its adaptation to Spanish (Carbó‐Carreté et al . ) and Portuguese (Simões et al . ), the Integral Scale (Verdugo et al .…”

“…To examine this question, we used the Spanish version of the POS (Carbó‐Carreté et al . ) and estimations of differential item functioning (DIF). More specifically, DIF estimates were used to assess whether an external variable could affect the observed distribution of the items, that is, to determine whether there was possible bias.…”