Abstract: A method of concept testing which includes performing a multi-attribute evaluation of prompts comprising concepts and existing products which compete in the same consumer market, eliciting from consumers evaluations of the extent to which each attribute ideally should be possessed by a product in the same consumer market, eliciting from consumers evaluations of their likelihood of purchasing the existing products and products described by the prompts, performing an independence factor analysis, and calculating for each prompt the deviation of the attribute evaluation from the mean.