This four-item semantic differential measures how central, useful, functional, and practical a consumer considers a specific feature of a product to be. Garbas, Schubach, Mende, Scott, and Schumann (2023) used it with car owners from an online consumer panel in research on why customers can feel betrayed by paid internal product upgrades (for example, unlocking a feature that is already built into a car). The authors wrote the items using key words from measures employed by Bertini, Ofek, and Ariely (2009) and Cox and Cox (2002).
7-point semantic differential (higher scores indicate greater centrality; scoring not explicitly reported)
Full scale items shown. Always cite the original source when using this scale in research.
Alpha was .88 (Study 4, n = 476) (Garbas et al. 2023, p. 307); validity was not discussed. Stem: 'The feature is ...'. The authors did not describe the response format in detail; a seven-point scale with higher scores reflecting greater centrality appears to have been used. See also Product Feature Tangibility (this batch) and Product Upgrade Likelihood (this batch), both from the same article.
Garbas, Janina, Sebastian Schubach, Martin Mende, Maura L. Scott, and Jan H. Schumann (2023), "You Want to Sell This to Me Twice!? How Perceptions of Betrayal May Undermine Internal Product Upgrades," Journal of the Academy of Marketing Science, 51 (2), 286-309.
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