The data analysis consisted of regressing attitudes toward Head and Shoulders, Prell and Breck shampoos, as measured by three different ways (good-bad, like-dislike and favorable-unfavorable opinions of the brand) on the cognitive components of each of the three models. In the case of the Rosenberg model, this involved first calculating a weighted sum score for each individual for each brand from PIi and VIi measures as operationalized by Rosenberg. Then attitudes were regressed on this weighted sum score. The resultant regression of attitude toward the brand on this weighted sum score is by definition a simple regression.