Adaptation and Incremental Validity of the Pemberton Happiness Index: A New Measure of Integrative well-being for People with Intellectual Disabilities
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2022
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Taylor & Francis
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Monterde, N., Blanco, I. & Hervas, G. (2023). Adaptation and Incremental Validity of the Pemberton Happiness Index: A New Measure of Integrative Well-Being for People with Intellectual Disabilities, Journal of Mental Health Research in Intellectual Disabilities, 16(4), 277-290
Abstract
Introduction. The assessment of well-being is crucial for measuring the effects of psychosocial interventions in people with intellectual disabilities. The aim of this study was to adapt and validate a measure of integrative well-being, the Pemberton Happiness Index (PHI) to use it specifically for this population.
Methods. The Pemberton Happiness Index was first tailored to individuals with intellectual disabilities (PHI-Intellectual Disabilities). Then a sample of 130 adults with mild-moderate intellectual disabilities completed this adapted version alongside other well-being and affective measures.
Results. The psychometric properties of this new PHI-Intellectual Disabilities were shown to be very good (i.e., internal consistency, convergent and incremental validity).
Conclusion. The study provides initial evidence of the reliability and validity of a brief measure of well-being that can be used for both applied and research purposes specifically for adults with mild-moderate intellectual disabilities.