A eight-item likert scale designed to measure the degree to which a consumer includes some important brands in his/her self-concept.
Sprott, David, Sandor Czellar, and Eric Spangenberg (2009), “The Importance of a General Measure of Brand Engagement on Market Behavior: Development and Validation of a Scale,” Journal of Marketing Research, 46 (1), 92-104.
Free access to 2023+ psychometric scales at PsychScales