Petty and Cacciopo on Low-Level Argument Processing

"When either the motivation or the ability to process issue-relevant arguments is low, attitudes may be changed by associating an issue position with various affective cues, or people may attempt to form a reasonable opinion position by making an inference about the likely correctness or desirability of a particular attitude position based on cues such as message discrepancy, one's own behavior, and the characteristics of the message source." Petty and Cacciopo, "Elaboration Likelihood Model of Persuasion."