A multiple-item Likert-type scale designed to measure how much a person reports actively processing a stimulus s/he has been exposed to.
Ahluwalia, Rohini, H. Rao Unnava, and Robert E. Burnkrant (2001), “The Moderating Role of Commitment on the Spillover Effect of Marketing Communications,” Journal of Marketing Research, 38 (Nov), 458-470.
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