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

Chen, Shun; Liao, Faith; Murphy, David; Joseph, Stephen

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.

Citation

Chen, S., Liao, F., Murphy, D., & Joseph, S. (2021). Development and validation of a 12-item version of the Barrett-Lennard Relationship Inventory (B-L RI:mini) using item response theory. Current Psychology, 42( 10566–10580), https://doi.org/10.1007/s12144-021-02348-5

• Journal Article Type: Article
• Acceptance Date: Sep 28, 2021
• Online Publication Date: Oct 2, 2021
• Publication Date: Oct 2, 2021
• Deposit Date: Jul 29, 2022
• Publicly Available Date: Jul 29, 2022
• Journal: Current Psychology
• Print ISSN: 1046-1310
• Electronic ISSN: 1936-4733
• Publisher: Springer Verlag
• Peer Reviewed: Peer Reviewed
• Volume: 42
• Issue: 10566–10580
• DOI: https://doi.org/10.1007/s12144-021-02348-5
• Keywords: General Psychology
• Public URL: https://nottingham-repository.worktribe.com/output/7350997
• Publisher URL: https://link.springer.com/article/10.1007/s12144-021-02348-5