Why a third of people have difficulty learning from mistakes

About 30% of people have fewer D2 receptors in the brain because they have a gene variant called A1.

When people with many D2 receptors make a mistake, they feel satisfied that the mistake was a mistake.

When people with fewer D2 receptors make a mistake, they do not feel that the mistake was a mistake, so they continue to do the same wrong thing over and over again.

This would explain why many people are rigid, even in the face of black-and-white evidence. I knew a person who said sashimi was vinegared rice. I told her she had switched the meanings of sushi and sashimi. She said I was wrong. We looked it up in Webster's. She said the dictionary was wrong. If people are rigid about small meaningless things, they cannot possibly correct errors when the problems are big, complicated, and murky.

This is a very serious problem. If we test groups of people who cannot ever admit they are wrong and find that they have an unusual frequency of the A1 gene variant, we could see if there are ways to help them learn to overcome the feelings and be more effective, if they choose to do so. Or we can learn to just give up and let them watch a certain "news" station (Seriously, that "news" station is the saddest thing I have ever seen. They are doomed to stay that way for eternity, and it is all recorded, so people will be laughing at them as long as technical civilization exists, and since the transmissions escape the Earth, it is even being broadcast across the galaxy, so the entire universe will be laughing at them for eternity.)

http://news.scotsman.com/scitech/One-in-three-people-.3636016.jp