Why Do Smart People Make Big Mistakes? 3 Psychological Mechanisms

It is often assumed that highly intelligent people are rational and always make the right decisions, but the reality is a bit different. Smart people can make major mistakes, a phenomenon known in the worlds of psychology and cognitive science as the "intelligence trap."

One cause is a psychological phenomenon called "confirmation bias." This is the tendency to select only information that supports one's own ideas while unconsciously ignoring evidence to the contrary. Because highly intelligent people are skilled at constructing theories that support their own hypotheses, their thinking tends to move in an increasingly biased direction, making it harder for them to notice mistakes.

There is also the pitfall of "overconfidence."
When people become rich in knowledge and experience, they tend to overestimate their own abilities and lack caution. Precisely because they are confident, they overlook the possibility that they might be wrong. Looking at history, it is often the case that major failures by capable leaders and experts are caused by overconfidence.

Furthermore, "cognitive load" is also important.
The smarter a person is, the more they tend to try to process large amounts of information and tackle complex problems. However, there is a limit to the amount of information the human brain can process at once, and when that limit is exceeded, judgment declines. The ironic result is that the more information one adds, the more prone one becomes to making errors.

In other words, high intelligence does not necessarily lead to accurate judgment; rather, it can be said that the humility not to over-rely on one's own intelligence is crucial.

Intelligence is a great power, but precisely because of that, there exists an "intelligence trap" where it is easy to make mistakes. To make the most of one's intelligence, it is important to be aware that one's own judgment is not always correct and to maintain an attitude of reviewing things objectively.