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Related Concept Videos

Persuasion Strategies01:52

Persuasion Strategies

Researchers have tested many persuasion strategies, including the foot-in-the door and the door-in-the-face techniques, in a variety of contexts. Ultimately, the principles are effective in selling products and changing people’s attitude, ideas, and behaviors (Cialdini & Goldstein, 2004).
Social Proof00:52

Social Proof

Social proof is a form of persuasion based on comparison and conformity. People compare their behavior and actions to what others are doing and will change to conform to do what their peers do.
Routes of Persuasion02:20

Routes of Persuasion

Persuasion is the process of changing our attitude toward something based on some kind of communication. Much of the persuasion we experience comes from outside forces. How do people convince others to change their attitudes, beliefs, and behaviors? What communications do you receive that attempt to persuade you to change your attitudes, beliefs, and behaviors?
Milgram's Obedience to Authority02:20

Milgram's Obedience to Authority

Obedience to authority is classically demonstrated in a more famous series of social psychology experiments performed by Stanley Milgram. He was a social psychology professor at Yale who was influenced by the trial of Adolf Eichmann, a Nazi war criminal. Eichmann’s defense for the atrocities he committed was that he was “just following orders.”
Behavior Modification01:21

Behavior Modification

Behavioral approaches have often been criticized for ignoring mental processes and focusing solely on observable behavior. However, these approaches provide an optimistic perspective for individuals seeking to change their behaviors. Rather than concentrating on intrinsic personality traits, behavioral approaches suggest that even longstanding habits can be modified by changing the reward contingencies that maintain them.
A real-world application of operant conditioning principles is applied...
Stress Prevention and Stress Management Techniques VI01:30

Stress Prevention and Stress Management Techniques VI

Adopting a healthier lifestyle often requires overcoming significant challenges, but leveraging psychological, social, and cultural resources can facilitate meaningful change. Effective self-change hinges on understanding and applying key tools such as motivation and goal setting, which help sustain efforts toward long-term health benefits.
Motivation and Self-Determination
Motivation, the driving force behind behavior, plays a pivotal role at every stage of the change process. The research...

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Related Experiment Video

Updated: May 23, 2026

Electroencephalographic, Heart Rate, and Galvanic Skin Response Assessment for an Advertising Perception Study: Application to Antismoking Public Service Announcements
06:39

Electroencephalographic, Heart Rate, and Galvanic Skin Response Assessment for an Advertising Perception Study: Application to Antismoking Public Service Announcements

Published on: August 28, 2017

How Effective Are Credible Sources in Changing Behavior? A Systematic Review with Meta-Analysis.

Jack Hamer1, Tracy Epton1, Danielle Hamer2

  • 1University of Manchester, UK.

Personality & Social Psychology Bulletin
|May 22, 2026
PubMed
Summary
This summary is machine-generated.

Credible sources have a small positive effect on behavior. Effectiveness is enhanced when sources are medical professionals, communication is in-person, and interventions are immediate and verbal.

Keywords:
behavior changebehavior change techniquecredible sourcemeta-analysispersuasion/social influence

Related Experiment Videos

Last Updated: May 23, 2026

Electroencephalographic, Heart Rate, and Galvanic Skin Response Assessment for an Advertising Perception Study: Application to Antismoking Public Service Announcements
06:39

Electroencephalographic, Heart Rate, and Galvanic Skin Response Assessment for an Advertising Perception Study: Application to Antismoking Public Service Announcements

Published on: August 28, 2017

Area of Science:

  • Behavioral Science
  • Psychology
  • Health Communication

Background:

  • Understanding factors influencing behavior is crucial.
  • Credible sources are often assumed to impact behavior, but empirical evidence needs synthesis.
  • Focusing on performed behavior, not just attitudes, offers deeper insights.

Purpose of the Study:

  • To systematically review and meta-analyze the effects of credible sources on performed behavior.
  • To identify contexts and conditions under which credible sources are most effective.
  • To differentiate effects on behavior from effects on behavioral antecedents like attitudes.

Main Methods:

  • Systematic review and meta-analysis of 34 papers.
  • Searched six databases up to June 2024.
  • Analyzed 40 effect sizes from 7,995 participants (58.42% female, mean age 17.75).

Main Results:

  • A small, statistically significant positive effect of credible sources on behavior was found (d = 0.14).
  • Significant moderators included medical professional qualification, in-person communication, verbal/combined interventions, single occurrence behavior, and immediate post-intervention timing.
  • Effect sizes varied based on specific contextual factors.

Conclusions:

  • Credible sources exert a small but significant influence on performed behavior.
  • The effectiveness of credible sources is context-dependent, with specific characteristics amplifying their impact.
  • The cost-benefit of employing credible sources should be carefully considered due to the modest effect size.