Assessing Relationship Commitment in Urdu-Speaking Population: Validation of Urdu Translated and Adapted Version of Investment Model Scale (IMS)

Abstract

The study involved translating and adapting the Investment Model Scale, used to measure relationship commitment among married individuals, into Urdu for use in Pakistan. It comprised two phases: cross-language validation and establishing psychometric properties. In the first phase, 40 bilingual married individuals were sampled for validation, while the second phase involved 316 married individuals aged 18 to 64 to establish psychometric properties using snowball sampling. The study found highly significant correlations across language versions (p<.01), and Confirmatory Factor Analysis showed good model fit indices (CFI = .94; χ2 = 459.90). The translated scale demonstrated conceptual equivalence to the original, proving to be a reliable and valid tool for measuring relationship commitment in Pakistan's married population.