Attitude strength (what makes attitudes durable and impactful) has become an important topic in the domain of social influence. We review three areas in which the traditional view of attitude strength has been modified or updated since the publication of Petty and Krosnick’s 1995 edited book on the topic. First, although it was widely assumed that there were different categories of strength variables (i.e., operative versus meta-cognitive), it may now be better to recognize that each strength property can be measured both structurally and subjectively and that each measure is useful. Second, although scholars assumed that virtually all persuasion techniques would work better on weaker than stronger attitudes, recent research suggests that some techniques might actually work better on stronger than weaker attitudes. Third, although stronger attitudes often guide behavior better than weaker ones, when strength is challenged or weak attitudes are threatening, people can be motivated to act to demonstrate or restore certainty. This can result in weaker attitudes leading to more extreme behavior.
