Rather than asking about one's own brand knowledge, this four-item version asks how expert a specific other person is believed to be about a brand.
7-point Likert (1=strongly disagree, 7=strongly agree)
Zhang, Z., & Patrick, V.M. (2021). Mickey D’s Has More Street Cred Than McDonald’s: Consumer Brand Nickname Use Signals Information Authenticity. Journal of Marketing, 85(5), 58–73.
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