A PMT involves interviewing consumer about attitudes and usage behavior concerning a product concept using product descriptions or mock-ups of advertisements, and their responses would be assessed (see Exhibit 4 on page 213). These consumers would then be given an opportunity to receive the product if interested. After an in-home usage period of several weeks, they would be contacted by telephone and asked about their attitude toward the product, use of the product, and intention to repurchase. These data would be incorporated into computer models that would include element of the product’s marketing plan (price, advertising, distribution coverage). The output provided by the PMT would include estimates of household trial rates, repeat rates, average number of