(LEC) Ch. 7 - Persuasion
Message Characteristics and Persuasion
Discrepancy and the "Rubber Band" Metaphor
Concept: Persuasion is possible when there's a discrepancy between an individual's current attitudes and the message being presented.
Metaphor: This process is analogous to stretching a rubber band.
You can stretch it up to a certain point, increasing discrepancy, which ideally leads to more persuasion.
However, if stretched too far, the "rubber band snaps" – meaning the discrepancy becomes so great that the audience rejects the message entirely, and persuasion fails.
Expert Influence: Experts often have more "leeway" and can present a more discrepant message without the rubber band snapping.
Message Quality: One-Sided vs. Two-Sided Appeals
Definition:
Two-Sided Appeal: Acknowledges and addresses the opposing viewpoint or arguments against the communicator's position.
One-Sided Appeal: Presents only arguments in favor of the communicator's position, ignoring opposing views.
Effectiveness Factors:
Two-Sided Appeal is More Persuasive When:
The audience is already aware of both sides of an issue.
The audience initially disagrees with the communicator's side (e.g., in presidential debates, where you need to persuade people with differing beliefs).
One-Sided Appeal is More Effective When:
The audience is already on your side or agrees with your view (e.g., in primary political debates, where attendees are usually aligned with the candidate).
This approach can backfire if the audience is aware of counterarguments that are not addressed.
Recency and Primacy Effects
Definition of Effects: These describe when information presented in a sequence has more impact.
Recency Effect: The information heard last is remembered best and has the most impact.
Scenario for Recency: Occurs when there's Message 1, then a delay, then Message 2. In this case, it's better to deliver your message last.
Primacy Effect: The information heard first is remembered best and has the most impact.
Scenario for Primacy: Occurs when there's Message 1, then Message 2, then a delay before the decision. In this case, it's better to deliver your message first.
Fear Appeals
Effectiveness: Fear appeals can be highly effective in persuasion, but with a crucial condition.
Condition for Success: Fear appeals are most effective when they provide:
A clear and present threat or negative consequence.
Specific, concrete steps or recommendations that the audience can take to avoid the threat.
Examples:
Child Dental Health: Telling children their teeth will suffer (fear) and then recommending they brush their teeth (solution) increases compliance.
DNC Political Ad (September 7, 1964): This famous ad effectively portrayed the Republican candidate as a "threat to peace" and simultaneously offered a clear solution (voting for the DNC candidate). It was remarkably effective despite being shown only once.
Mood and Persuasion
General Principle: People are generally more persuaded when they are in a positive mood, even if the persuasive message is negative.
Experiment:
Setup: Participants were presented with messages about seemingly unrealistic ideas (e.g., curing cancer, a trip to the moon, 3D movies).
Manipulation: Half of the participants were given Coca-Cola and peanuts beforehand, ostensibly to boost their mood.
Result: Participants who received the food (and thus were presumably in a better mood) were significantly more persuaded by the messages, regardless of the topic's realism.
Real-World Application: This principle explains why commercials often use humor, upbeat music, or feel-good imagery to put viewers in a good mood, making them more receptive to the product's message.
Self-Perception Theory and Head Movements
Concept: According to self-perception theory, people infer their own attitudes and beliefs by observing their own behavior.
Experiment:
Setup: Participants listened to a radio editorial.
Manipulation: One group was instructed to make vertical head movements (nodding "yes"), while another group made horizontal head movements (shaking "no").
Result: Those who nodded their heads up and down agreed more with the editorial than those who shook their heads. This suggests that the physical act of nodding led them to perceive themselves as agreeing with the message, thus increasing persuasion.
Summary of Yale Model of Persuasion Elements
Speaker/Source Characteristics:
Credibility: How trustworthy and expert the source is perceived to be.
Attractiveness: The physical or personal appeal of the communicator.
Aggressiveness: How the communicator's demeanor impacts perception and persuasiveness.
Message Characteristics:
Discrepancy: The difference between the message's position and the audience's initial stance (too much discrepancy can lead to rejection; experts have more leeway).
One-Sided vs. Two-Sided Appeals: Deciding whether to acknowledge opposing views based on audience awareness and initial agreement.
Primacy & Recency Effects: When it's more effective to be first or last in presenting a message based on timing.
Fear Appeals: Effectiveness depends on providing concrete solutions to avoid a perceived threat.
Applying the Yale Model to Cults
Source Credibility: Cult leaders often cultivate immense credibility by fostering extreme closeness, making themselves appear as family or indispensable figures.
Audience Characteristics: Cults often target highly insecure, desperate, or vulnerable individuals who are seeking belonging and direction.
Message Characteristics:
One-Sided Appeals with Isolation: Cults predominantly use one-sided appeals.
Members are often isolated from friends and family, preventing them from hearing counterarguments or differing perspectives, thereby reinforcing the cult's narrative and making them unaware of "the other side."
Elaboration Likelihood Model (ELM)
Core Idea: The ELM proposes two distinct routes by which people can process persuasive messages, influencing the strength and duration of attitude change.
Two Routes of Processing:
Central Route (System 2 Processing):
Nature: Involves careful, deliberate, and effortful thought about the message's content and arguments.
Influence: Persuasion through this route is primarily influenced by the quality and strength of the arguments.
Outcome: Tends to lead to more lasting and resistant attitude change.
When to Use: Best when the audience is highly motivated, analytical, and has strong (quality) arguments to present.
Peripheral Route (System 1 Processing):
Nature: Involves less effortful, quick processing, focusing on superficial or "peripheral" cues rather than the message's content.
Influence: Persuasion through this route is influenced by contextual factors like source attractiveness, mood, number of arguments (regardless of quality), or perceived expertise.
Outcome: Can lead to attitude change, but it is often less enduring, less resistant to counter-persuasion, and may occur without full conscious realization.
When to Use: Best when the audience is unmotivated, not analytical, or when the arguments themselves are weak.
Prediction: The ELM predicts that the degree of thought (elaboration) people apply in a persuasive context determines the consequences of the resulting attitude change, including its durability and impact on behavior.
Example (Cereal Commercial):
Jack's Approach (Peripheral): Using a famous actor (a superficial cue) to endorse fiber flakes relies on the peripheral route, as it appeals to source attractiveness/fame rather than argument quality.
Odetta's Approach (Central): Emphasizing the cereal's nutritional value (a strong argument) relies on the central route, appealing to the audience's logical assessment of benefits.