Cognitive Bias

Researchers considered that question specifically for new technology foods, like GMOs, where there is a great deal of public opposition.
Many studies make use of self-reported behavior, nutritional studies asking what you are eating, or surveys asking about how much exercise you do.
I try, often successfully, to spend at least 30 minutes a day riding my Peloton; and on those days that I succeed I have had a great workout and deserve a reward.
Analyzing data, especially in a table format, can be a formidable challenge. Edward Tufte has for decades championed using graphics to understand and evaluate data.