The myth of 200 daily food decisions: Study challenges widely-cited claim

Researchers at the Max Planck Institute for Human Development have taken a critical look at the often-cited claim that individuals make over 200 daily unconscious decisions about food. This figure, which has permeated scientific literature, media, and health campaigns for nearly two decades, has never been empirically validated. An article published in the journal Appetite sheds light on the need for a more nuanced understanding of eating behavior.

The use of numbers in health communication is essential for providing guidance and motivation. However, the benchmarks used are not always scientifically accurate or meaningful. In the realm of health research, the assertion that people make more than 200 food decisions each day without awareness has been widely accepted.

Maria Almudena Claassen, a postdoctoral fellow at the Max Planck Institute for Human Development, along with Director Ralph Hertwig and Jutta Mata, an associate research scientist at the institute and Professor for Health Psychology at the University of Mannheim, have published an article challenging the validity of this claim. They argue that the figure of 200 food decisions per day lacks empirical evidence and can distort individuals’ perceptions of their control over their eating habits.

The origin of the 200 food decisions per day figure can be traced back to a study conducted by U.S. scientists Brian Wansink and Jeffery Sobal in 2007. Participants were asked to estimate the number of decisions they made about eating and drinking daily, which averaged around 14.4. By multiplying these estimations with the number of meals, snacks, and beverages consumed, the researchers arrived at an average of 226.7 daily decisions. The discrepancy between the two estimates was interpreted as unconscious or “mindless” decisions.

However, Claassen and her team point out methodological and conceptual flaws in the study, highlighting the subadditivity effect as a key factor influencing participants’ responses. This effect explains why individuals tend to provide higher frequency estimates when asked to assess specific aspects of a general question separately.

The researchers caution against the implications of oversimplifying eating behavior, as it can undermine individuals’ self-efficacy. They advocate for a more context-specific approach to defining and studying food-related decisions, emphasizing the importance of understanding the situational factors that influence choices.

To gain a more nuanced understanding of people’s food decisions, the researchers recommend a methodological pluralism approach. By combining qualitative observations, digital tracking tools, diary studies, and cross-cultural research, a more comprehensive picture of eating behavior can be developed.

Armed with this knowledge, individuals can make informed and health-promoting decisions in their daily lives. Strategies like self-nudging, which involves designing one’s environment to facilitate healthier choices, can help individuals align their food choices with their goals without relying solely on conscious control.

In conclusion, the myth of 200 daily food decisions serves as a reminder of the importance of critically evaluating widely accepted claims in health research. By taking a more nuanced and context-specific approach to understanding eating behavior, individuals can make more informed choices that support their well-being.