Message generalizations that support evidence-based persuasive message design: specifying the evidentiary...

Area of Science:

• Communication Science
• Psychology
• Behavioral Science

Background:

• Persuasive message design relies on understanding which message features are most effective.
• Generalizations about message persuasiveness require dependable, research-based evidence.
• Current evidence synthesis methods may not fully capture the nuances of message effectiveness.

Purpose of the Study:

• To propose five essential criteria for evaluating evidence on persuasive message design.
• To guide researchers in generating and synthesizing high-quality evidence for message effectiveness.
• To enhance the reliability and applicability of research findings in persuasive communication.

Main Methods:

• The study proposes five propositions for evidence quality in persuasive message research.
• These propositions focus on study design, outcome reporting, synthesis methods, outcome equivalence, and inclusion criteria for research.
• Emphasis is placed on replicated randomized trials and random-effects meta-analysis.

Main Results:

• Evidence quality is enhanced by using replicated randomized trials with varied message features.
• Reporting effect sizes and confidence intervals is crucial, rather than relying solely on statistical significance.
• Synthesizing results via random-effects meta-analysis and treating different outcome measures as equivalent improves generalization.

Conclusions:

• Adherence to the five proposed principles will lead to more dependable generalizations in persuasive message design.
• This framework supports evidence-based strategies for creating more effective persuasive messages.
• The criteria ensure that research syntheses are robust, inclusive, and yield practically meaningful insights.