Fact-checker warning labels are effective even for those who distrust fact-checkers

Area of Science:

• Social Sciences
• Communication Studies
• Psychology

Background:

• Online misinformation poses a significant societal challenge.
• Fact-checker warning labels are a common intervention strategy.
• The effectiveness of these labels among individuals distrusting fact-checkers is debated.

Purpose of the Study:

• To validate a measure of trust in fact-checkers.
• To meta-analyze the effectiveness of fact-checker warning labels across multiple experiments.
• To assess label efficacy across varying levels of user trust in fact-checkers.

Main Methods:

• A correlational study (N=1,000) to validate trust in fact-checkers.
• Meta-analysis of 21 experiments (N=14,133) involving true and false news evaluation.
• Randomized controlled trials comparing warning labels versus no labels on false news.

Main Results:

• Warning labels significantly reduced belief in (27.6%) and sharing of (24.7%) false headlines on average.
• Effectiveness was reduced but still significant for participants with lower trust in fact-checkers (belief: 12.9%, sharing: 16.7%).
• Validated a measure for assessing trust in professional fact-checkers.

Conclusions:

• Fact-checker warning labels are a broadly effective tool against online misinformation.
• Labels demonstrate utility even for audiences skeptical of fact-checking.
• The intervention shows resilience across diverse user trust levels.