Historical Context & Motivation
The scientific study of attitudes sits at the heart of social psychology, having provided the field with one of its most enduring research traditions. In the early twentieth century, psychologists recognized that understanding how individuals evaluate their social world—whether favorably or unfavorably—could illuminate phenomena ranging from consumer behavior to racial prejudice to political polarization. The construct of the attitude was so central that Gordon Allport famously declared it the most indispensable concept in social psychology. Over the next century, researchers developed increasingly sophisticated models to explain not only how attitudes form through experience, learning, and social influence, but also why some attitudes prove remarkably resistant to change while others shift in response to a single persuasive message.
Across this historical arc, a fundamental question persisted: If attitudes are learned evaluations that shape behavior, what determines whether a particular attitude is easily changed or deeply entrenched? Answering this question requires understanding the mechanisms through which attitudes form in the first place—through direct experience, classical and operant conditioning, observational learning, and cognitive processing—and then examining the conditions under which persuasion, dissonance, and social pressure can alter them.
Core Principles & Definitions
An attitude is a relatively stable evaluation of a person, group, object, or idea along a favorable-to-unfavorable dimension. Psychologists traditionally decompose attitudes into three interrelated components—often called the ABC model: the Affective component (emotional reactions), the Behavioral component (actions or behavioral intentions), and the Cognitive component (beliefs and thoughts). These three components do not always align perfectly, and discrepancies among them can create the internal tension that drives attitude change.
Classical Conditioning
Operant Conditioning
Observational Learning
Cognitive Appraisal
Mere Exposure Effect
Visual Explanation — The ABC Model of Attitudes
The diagram above captures the tripartite structure at the core of attitude research. Notice that each component can carry an independent valence: a person might hold a negative emotional association with exercise ("I dread the gym") while simultaneously holding positive beliefs about its health benefits ("Exercise reduces cardiovascular risk"). When these components conflict, the resulting attitude is said to be ambivalent, and ambivalent attitudes tend to be weaker predictors of behavior and more susceptible to persuasion than univalent ones. The ABC model thus explains not only what attitudes are composed of, but also why certain attitudes are more vulnerable to change.
Mechanisms of Attitude Change
Cognitive Dissonance Theory
Leon Festinger's cognitive dissonance theory posits that when an individual holds two psychologically inconsistent cognitions—or when behavior contradicts an existing attitude—an aversive state of dissonance arises, motivating the person to reduce the inconsistency. Festinger and Carlsmith's classic 1959 experiment demonstrated this elegantly: participants who were paid only $1 to tell a waiting participant that a boring task was enjoyable subsequently reported finding the task more interesting than participants paid $20. The low-payment group had insufficient external justification for their lie, so they changed their attitude to align with their behavior—a phenomenon that cannot be explained by simple reinforcement. Dissonance reduction can take several forms: changing the attitude, changing the behavior, adding consonant cognitions to justify the inconsistency, or trivializing the importance of the discrepant elements.
Self-Perception Theory
Daryl Bem's self-perception theory offers a competing account of the same phenomena. Rather than experiencing an aversive motivational state, Bem argued, people simply infer their attitudes by observing their own behavior and the context in which it occurs—much as an outside observer would. If you notice that you voluntarily eat sushi every Friday, you conclude that you must like sushi. The key distinction is that self-perception theory applies most clearly when initial attitudes are weak or ambiguous, whereas cognitive dissonance theory better explains attitude change when a person acts in ways that clearly contradict a strong pre-existing attitude.
The Elaboration Likelihood Model (ELM)
Petty and Cacioppo's Elaboration Likelihood Model (ELM) describes persuasion as occurring along a continuum defined by the degree to which a message recipient engages in thoughtful elaboration. The central route is activated when the recipient is both motivated and able to process the message carefully; attitude change produced through this route tends to be durable, resistant to counter-persuasion, and predictive of behavior. The peripheral route operates when motivation or ability is low, leading the recipient to rely on heuristic cues—source attractiveness, number of arguments, emotional appeals—rather than argument quality. Attitudes formed via the peripheral route are typically weaker and more transient.
Factors That Influence Persuasion
Carl Hovland and the Yale Attitude Change Approach identified four categories of variables that systematically affect the likelihood of persuasion: the source (who delivers the message), the message (what is communicated), the channel (through what medium), and the audience (to whom). These four factors interact in complex ways—for instance, a highly credible source may be more persuasive when the audience is not highly motivated to scrutinize arguments, but source credibility matters less when motivation is high and the audience focuses on argument quality instead.
| Factor | Key Variables | Research Finding |
|---|---|---|
| Source | Credibility, attractiveness, similarity to audience | Expert sources produce more persuasion via the peripheral route; the sleeper effect shows that a low-credibility source's message can become more persuasive over time as the source is forgotten. |
| Message | One-sided vs. two-sided arguments, fear appeals, framing | Two-sided messages are more effective with informed audiences. Fear appeals work best when paired with a clear, feasible action plan (protection motivation theory). |
| Channel | Face-to-face, print, video, social media | Complex messages are more persuasive in writing (allowing re-reading), while simple messages benefit from video delivery where nonverbal cues can enhance impact. |
| Audience | Age, need for cognition, prior attitudes, self-esteem | Individuals high in need for cognition prefer and are more influenced by strong arguments (central route). Forewarning can inoculate audiences against persuasion. |
Worked Example — Analyzing Attitude Change in a Scenario
Consider the following scenario: Maria, a college student, has always disliked recycling, viewing it as time-consuming and pointless. Her environmental science professor assigns the class to write a persuasive essay in favor of recycling for a campus newsletter. After writing the essay, Maria notices she feels more positive toward recycling. Let us analyze this step by step using the theories of attitude change.
Comparing Theories of Attitude Change
Students preparing for the AP exam must be able to distinguish among the major theories of attitude change and identify which theory best explains a given scenario. The following comparison highlights the key dimensions on which these theories differ—their core mechanisms, the conditions under which each is most applicable, and the predictions each makes about the durability of attitude change.
| Dimension | Cognitive Dissonance | Self-Perception | ELM (Central Route) |
|---|---|---|---|
| Core mechanism | Aversive arousal from inconsistency between cognitions | Inference from self-observation of behavior | Thoughtful elaboration of message arguments |
| When most applicable | Behavior clearly contradicts a strong existing attitude | Attitudes are weak or ambiguous; low arousal situation | Audience is highly motivated and able to process |
| Role of arousal | Central—arousal drives the motivation to change | None—purely cognitive inference process | Not emphasized; focus is on cognitive elaboration |
| Durability of change | Moderate to high if dissonance is fully resolved | Variable—depends on continued behavioral cues | High—resistant to counter-persuasion and predictive of behavior |
| Classic study | Festinger & Carlsmith (1959) — $1 vs. $20 | Bem (1972) — reinterpretation of Festinger data | Petty, Cacioppo, & Goldman (1981) — personal relevance |
Connections to Advanced Topics & Implicit Attitudes
The theories discussed so far focus primarily on explicit attitudes—evaluations that individuals can consciously report. However, a major advance in attitude research has been the recognition that people also hold implicit attitudes, which are automatic evaluative associations that operate outside of conscious awareness and may differ from stated beliefs. Greenwald, McGhee, and Schwartz (1998) introduced the Implicit Association Test (IAT), which measures the speed with which individuals pair concepts (e.g., race and positive/negative words), revealing biases that self-report measures might miss. This dual-attitude framework complicates the study of attitude change because changing an explicit attitude does not necessarily alter its implicit counterpart.
| Feature | Explicit Attitudes | Implicit Attitudes |
|---|---|---|
| Measurement | Self-report scales (e.g., Likert scale) | Reaction-time tasks (e.g., IAT) |
| Awareness | Consciously accessible and reportable | Often operate below conscious awareness |
| Change process | Persuasion, dissonance, self-perception | Evaluative conditioning, prolonged counter-stereotypic exposure |
| Behavioral prediction | Better for deliberate, controlled behavior | Better for spontaneous, automatic behavior (e.g., nonverbal bias) |
Understanding the explicit-implicit distinction is increasingly important for AP Psychology, particularly in the context of stereotyping, prejudice, and discrimination. Research on attitude inoculation—exposing individuals to weakened counterarguments to build resistance to future persuasion—also represents an advanced application of attitude-change principles. William McGuire's inoculation analogy proposes that just as a biological vaccine introduces a weakened pathogen to stimulate immune defenses, presenting and refuting weak opposing arguments strengthens one's resistance to subsequent, stronger attacks on their attitude. This concept has modern applications in combating misinformation and has been empirically tested in digital media contexts.
Practice Problems
Lesson Summary
An attitude is a learned evaluative disposition composed of three interacting components: the affective (emotional reactions), behavioral (actions and intentions), and cognitive (beliefs and thoughts) components. Attitudes form through classical conditioning, operant conditioning, observational learning, cognitive appraisal, and the mere exposure effect. Attitude change is driven by multiple mechanisms: cognitive dissonance produces change when behavior contradicts a strong existing attitude, self-perception theory explains attitude inference when prior attitudes are weak, and the Elaboration Likelihood Model distinguishes between durable central route processing and temporary peripheral route processing.
The Yale Attitude Change Approach organizes persuasion variables into source, message, channel, and audience factors. Advanced topics include the distinction between explicit and implicit attitudes (measured by the Implicit Association Test) and attitude inoculation as a strategy for building resistance to persuasion. For the AP exam, focus on matching each theory to the appropriate scenario by identifying cues about arousal, attitude strength, and processing depth.