Product involvement

1. These products ought to be important to me;
2. These products are very important to me;
3. Compared with other products, these products are important to me;
4. I’m interested in these products

7 points scale: 1 = totally disagree, 7 = totally agree

Malär, L., Krohmer, H., Hoyer, W. D., & Nyffenegger, B. (2011). Emotional Brand Attachment and Brand Personality: The Relative Importance of the Actual and the Ideal Self. Journal of Marketing, 75(4), 35–52.