Misinformation has long posed a substantial threat to public health, but it has not been clear who is most at risk. โฆ [P]revious studies suggest that older adults are more likely than younger individuals to share and consume misleading content online2,3. Evidence in the health domain, however, remains more limited. A study by Lyons and colleagues now reveals a clear age gap: overall exposure to low-credibility online health content is limited, but it is disproportionately concentrated among older adults.
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Lyons and colleagues found that adults aged 60 years and older were significantly more likely than the youngest cohort (ages 18โ29 years) to visit low-credibility health sites, did so more frequently, and had a higher proportion of their overall health browsing coming from these sites.
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They found that the same pattern extended to YouTube. As with the open web, the overall level of exposure to low-credibility health content on YouTube was low, and the average respondent viewed only about 0.73 such videos. However, although older adults generally consumed less content on YouTube than younger users, a higher proportion of what they watched came from low-credibility sources. This vulnerability also extended across domains. Individuals who were more likely to encounter low-credibility health content were also more likely to consume dubious political news. This cross-platform and cross-domain consistency points to a broader vulnerability in the information diet of older adults, one that goes beyond the traditional websites and beyond health-related misinformation.
Concerns about exposure to low-credibility content rest on the assumption that such exposure can distort health beliefs and misguide health decisions. Although this study does not provide causal evidence, it offers correlational findings that help us to infer the potential harmful effect of such exposure. Greater exposure to low-credibility content is associated with poorer discernment between accurate and inaccurate cancer news headlines and stronger belief in false cancer risk factors. Moreover, exposure to low-credibility content tends to be especially concentrated among older adults who exhibit greater belief in these false health items. The results point to the possibility of a reinforcing cycle in which increased exposure fuels misperceptions, and those misperceptions, in turn, drive individuals towards more low-credibility content.
These findings prompted the researchers to investigate why older adults are more susceptible to low-credibility content. They found that very little traffic to low-credibility health sites originated from search engines or social media. Instead, older adults were often referred from other low-credibility sites. This pattern suggests a contained โrabbit holeโ dynamic: once users enter a dubious information ecosystem, they are more likely to remain within it and encounter additional low-credibility content through cross-links among similar sources. Another potential driver relates to older adultsโ pre-existing views and worldviews. The study found that conservatism, right-leaning partisan news consumption and conspiracist worldviews were all associated with greater exposure to low-credibility content. Together, these findings suggest that addressing health misinformation requires a holistic understanding of older adultsโ media habits. It calls for interventions that consider the broader information ecosystems and belief structures that shape how older adults navigate the digital world.
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