Jennifer Aaker identified 5 core dimensions of brand personality: Sincerity, Excitement, Competence, Sophistication, and Ruggedness. She developed a framework to measure brand personality using 114 traits rated by 631 subjects across 37 brands. The framework provides valid and reliable measurements of how brands are perceived along these 5 dimensions by consumers on a human level beyond just product attributes. An analysis of 3 cola brands, Coca-Cola, Pepsi, and Thums Up found that while all scored similarly on Excitement, Coca-Cola was seen as most sincere and competent with Thums Up seen as most rugged.