Ice cream sales and drownings increase significantly during summer. Although these two outcomes are closely connected, they probably occur in close proximity to each other and may even involve the same people, no sensible observer would claim that buying a snow cone increases your risk of drowning. Most of us intuitively recognize that ice cream purchases and drownings are correlated but caused by independent factors that are also more prevalent during the scorching summer months. Trying to reduce ice cream consumption in July in hopes of reducing pool accidents would be nonsensical.
This fictional scenario illustrates the importance of distinguishing correlation and causation, yet many people are unable to separate the two when they read alarming headlines about chemical exposure and public health. This mistake can lead to flawed conclusions, impacting personal choices, policy, and societal outcomes.
Perhaps the most serious consequence is that misinterpreting correlation as causation can distort public perception. For instance, stories linking trace amounts of lead in baby food to autism unnecessarily scare parents, encouraging litigation and regulations that, while costly, do nothing to improve food safety or prevent autism.
Public literacy in this area ensures critical scrutiny of evidence, preventing hasty or harmful decisions. In an era of data-driven narratives, from health trends to economic forecasts, people are bombarded with statistics. Recognizing that correlation requires further investigation to establish causation empowers individuals to question headlines, seek primary sources, and avoid manipulation by biased or incomplete interpretations.
Join GLP founder Jon Entine and longtime contributors Liza Dunn and Cameron English as they discuss the pitfalls surrounding correlation and causation. Follow this link or listen to the conversation below:
Share this article
— Liza Dunn (@DrLizaMD) June 13, 2025
Dr. Liza Dunn is a medical toxicologist and the medical affairs lead at Bayer Crop Science. Follow her on X @DrLizaMD
Jon Entine, founder and executive director of the Genetic Literacy Project, is an Emmy-winning investigative TV News producer and author of seven books, including three on genetics. Please follow him on X at @JonEntine
Cameron J. English is the director of bio-sciences at the American Council on Science and Health. Follow him on X @camjenglish
