Seven items assess the degree to which a consumer perceives that a proposed brand extension product is similar to the parent brand's existing products across multiple dimensions—needs, usage situations, required skills, physical features, and overall fit.
7-point Likert (1=strongly disagree, 7=strongly agree)
Full scale items shown. Always cite the original source when using this scale in research.
Draws on items from Smith and Park (1992) and Keller and Aaker (1992). Alpha .911. Blanks should be replaced with the extension product and parent brand name respectively.
DelVecchio, D., & Smith, D. C. (2005). Brand-extension price premiums: The effects of perceived fit and extension product category risk. Journal of the Academy of Marketing Science, 33(2), 184–196.
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