This scale measures how much of an expert a consumer considers themselves to be in a product category compared with other people. Ravula, Jha, and Biswas (2022) used it with respect to hotels in a study of 200 U.S. MTurk participants. Two of the four items came from Packard and Berger (2017); measures with similar wording have been used for various product categories since early work on automobile information search by Srinivasan (1987) and Srinivasan and Ratchford (1991).
7-point Likert (1=strongly disagree, 7=strongly agree)
Full scale items shown. Always cite the original source when using this scale in research.
Alpha was .912 (Ravula, Jha, and Biswas 2022, Web Appendix, p. 15); validity was not reported. Items 1 and 2 come from Packard and Berger (2017). The blank should be filled with a generic name for the product or service category. A different scale with the same base name, built from questions about how much a person knows relative to friends, is listed separately (ID 1586, Coulter and Micu 2005).
Ravula, Prashanth, Subhash Jha, and Abhijit Biswas (2022), "Relative Persuasiveness of Repurchase Intentions Versus Recommendations in Online Reviews," Journal of Retailing, 98 (4), 724-740.
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