When better is the enemy of good: two cautionary tales of conceptual validity versus parsimony in clinical psychometric research.
Qual Life Res
; 33(6): 1493-1500, 2024 Jun.
Article
em En
| MEDLINE
| ID: mdl-38457054
ABSTRACT
This paper presents an empirical challenge to the assumption that an item-response theory analysis always yields a better measure of a clinical construct. We summarize results from two measurement development studies that showed that such an analysis lost important content reflecting the conceptual model ("conceptual validity"). The cost of parsimony may thus be too high. Conceptual models that form the foundation of QOL measurement reflect the patient's experience. This experience may include concepts and items that are psychometrically "redundant" but capture distinct features of the concept. Good measurement is likely a balance between relying on IRT's quantitative metrics and recognizing the importance of conceptual validity and clinical utility.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Psicometria
/
Qualidade de Vida
Limite:
Humans
Idioma:
En
Revista:
Qual Life Res
Assunto da revista:
REABILITACAO
/
TERAPEUTICA
Ano de publicação:
2024
Tipo de documento:
Article
País de afiliação:
Estados Unidos