’Less is more’: validation with Rasch analysis of five short-forms for the Brain Injury Rehabilitation Trust Personality Questionnaires (BIRT-PQs)

L. Pellicciari, D. Piscitelli, B. Basagni, A. De Tanti, L. Algeri, S. Caselli, M.P. Ciurli, J. Conforti, A. Estraneo, P. Moretta, M.G. Gambini, M.G. Inzaghi, G. Lamberti, M. Mancuso, M.L. Rinaldesi, M. Sozzi, L. Abbruzzese, M. Zettin, F. La Porta

Research output: Contribution to journalArticlepeer-review

Abstract

Background: Previous analyses demonstrated a lack of unidimensionality, item redundancy, and substantial administrative burden for the Brain Injury Rehabilitation Trust Personality Questionnaires (BIRT-PQs). Objective: To use Rasch Analysis to calibrate five short-forms of the BIRT-PQs, satisfying the Rasch model requirements. Methods: BIRT-PQs data from 154 patients with severe Acquired Brain Injury (s-ABI) and their caregivers (total sample = 308) underwent Rasch analysis to examine their internal construct validity and reliability according to the Rasch model. Results: The base Rasch analyses did not show sufficient internal construct validity according to the Rasch model for all five BIRT-PQs. After rescoring 18 items, and deleting 75 of 150 items, adequate internal construct validity was achieved for all five BIRT-PQs short forms (model chi-square p-values ranging from 0.0053 to 0.6675), with reliability values compatible with individual measurements. Conclusions: After extensive modifications, including a 48% reduction of the item load, we obtained five short forms of the BIRT-PQs satisfying the strict measurement requirements of the Rasch model. The ordinal-to-interval measurement conversion tables allow measuring on the same metric the perception of the neurobehavioral disability for both patients with s-ABI and their caregivers.

Original languageEnglish
Pages (from-to)1741-1755
Number of pages15
JournalBrain Injury
Volume34
Issue number13-14
DOIs
Publication statusPublished - 2020

Fingerprint

Dive into the research topics of '’Less is more’: validation with Rasch analysis of five short-forms for the Brain Injury Rehabilitation Trust Personality Questionnaires (BIRT-PQs)'. Together they form a unique fingerprint.

Cite this