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Fabrigar, Leandre R.; Petty, Richard E.; Smith, Steven M.; Crites, Stephen L. . (2006). Understanding knowledge effects on attitude-behavior consistency: The role of relevance, complexity, and amount of knowledge.. Journal of Personality and Social Psychology, 90(4), 556–577. doi:10.1037/0022-3514.90.4.556 
10.1037/0022-3514.90.4.556