Theories of persuasion

14 important questions on Theories of persuasion

In order to understand persuasion, one must know...

  • Who says what to whom with what effect
    Speaker
  • Speaker + message + medium + audience = effect
  • Theories focus on single or different stages of this

What are the three theories of persuasion?

  1. McGuire's information processing model
  2. Cognitive response model
  3. Dual process models  

What does McGuire's information processing model look like?

  1. Exposure/presentation
  2. Attention/Awareness
  3. Comprehension/Understanding
  4. Acceptance
  5. Retention
  6. Action
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What are the assumptions of McGuire's information processing model? And what are counter arguments?

  • Hierarchical model: people must go through each of the stages
    • Skipping steps is possible
  • Systematic processing is required
    • Persuasion can occur without this
  • Learning of the message is essential for persuasion
    • Little scientific support
  • Passive receiver

What are the assumptions of the Cognitive Response Model?

  • The receiver is active
    • Not always correlation between argument recall and attitude change
    • Thoughts are also important
  • Receiver relates message with existing information
    • (Strong arguments:) Favorable thoughts: intended change
    • (Weak arguments:) Unfavorable thoughts: unintended/no change
    • The effect of argument strength disappears when distracted (when systematic processing is required)
    • People often do not think about advertising this deeply

What is the thought listing technique?

  1. PP list all thoughts during message presentation
  2. Catergorize relevant thoughts as (un)favorable
  3. Create index

What are the dual proces models and what do they have in common?

  • ELM: Elaboration Likelihood Model
  • HSM: Heuristic Systematic Model (Peripheral Central Model)

  • Information is being processed systematically or superficially
  • Processing mode depends on ability and motivation   

What is the Elaboration Likelihood Model?

  1. Persuasion Attempt
  2. Audience factors (high or low motivation and ability)
  3. Processing approach (Deep (quilitative) or superficial (attractiveness messager or number of arguments)
  4. Persuasion outcome (lasting change or temporary change)   

What predicts ability?

  • Knowledge
  • Distraction/time pressure
  • Repetition

What is the role of knowledge in processing ability?

You are better able to process the message systematically

Wood et al. (1985):
  • Counter-attitudinal message against preservation of the environment.
  • Argument strength had more effect on most knowledgeable students
  • Argument length had more effect on least knowledgeable students    

What is the role of distraction and time pressure in processing ability?

  • When the processing intensity is low, people are more likely to use heuristics
  • The case of multitasking: less attention for ads

What is the role of repetition in processing ability?

Wise in the beginning:
More repetition -> more ability to process
But too much -> irritation/wear out (particularly systematic processing)

What is the role of processing motivation?

Wanting to process the message
  • There are individual differences in this motivation
  • It is greater when something is personally relevant
  1. When something relates to values, goals and needs
    • Razor experiment. Most positive attitude when:
      • High personal Relevance & Strong arguments
      • Low personal relevance & Famous endorses
  2. When people are prone to considerable risk
    • Fear appeals

Are fear appeals effective?

Determined by personal vulnerability and perceived severity
  • Severe threat is unpleasant: results in defensive processing
  • Strong arguments: more motivated to process the recommended action (should be clear)
  • Self-efficacy: people should feel capable of engaging
    • If low: effectiveness is unlikely

So effective if:
  1. They have informational value
  2. The message is personally relevant
  3. When combined with self-efficacy

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