Development and validation of a 12-item version of the Barrett-Lennard Relationship Inventory (B-L RI:mini) using item response theory

Shun Chen* (Corresponding Author), Faith Liao, David Murphy, Stephen Joseph

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)
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Abstract

The Barrett-Lennard Relationship Inventory (B-L RI; Barrett-Lennard, (2015). The Relationship Inventory A Complete Resource and Guide. http://nbn-resolving.de/urn:nbn:de:101:1-201602103917) is the most widely used measure of the facilitative conditions described by Carl Rogers as important for constructive personality development in his person-centered theory. At with 64 items it is however time consuming for participants to complete, and even in its shorter form, the B-L RI is 40-items long. In order to improve its utility, a mini form of the B-L RI was developed. In study 1, we used item response theory to select 12 out of the full 64 items to form the B-L RI:mini based on their discrimination, difficulty, information, and measurement invariance across the English (n = 298), Chinese (n = 658), and Spanish (n = 330) language versions of the inventory. In study 2 (N = 362), we validated the reliability and validity of the new 12-item measure. It was found that the B-L RI:mini showed excellent total internal consistency, temporal stability, and construct validity. According to the results of the study, the B-L RI:mini maintains optimal psychometric properties with a small number of items. This scale is recommended for use in further studies.
Original languageEnglish
Pages (from-to)10566–10580
Number of pages15
JournalCurrent Psychology
Volume42
Early online date2 Oct 2021
DOIs
Publication statusPublished - 1 May 2023

Data Availability Statement

Data availability:
The data that support the findings of this study are available on request from the corresponding author. The data are not
publicly available due to terms of General Data Protection Regulation (GDPR).

Keywords

  • Barrett-Lennard Relationship Inventory
  • Short form
  • Item response theory
  • Person-centered theory
  • Bifactor model

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