Key points are not available for this paper at this time.
Deborah J. MacInnis, Christine Moorman, Bernard J. Jaworski, Enhancing and Measuring Consumers' Motivation, Opportunity, and Ability to Process Brand Information from Ads, Journal of Marketing, Vol. 55, No. 4 (Oct., 1991), pp. 32-53
MacInnis et al. (1991) studied this question.