Imagine that you own a transport business and that you need to hire a driver for a new truck that you have bought. You put an advertisement for this job and a person turns up to your office to be interviewed. In this interview, the person says, “I know how to cook rice very well”. Would you employ the person just based on the fact that he or she can cook rice to perfection? Of course you would not, as cooking rice has nothing to do with the qualities needed to be a good truck driver. While this example may be a bit unreal, you may be surprised to learn that our brains can often stupidly use completely unrelated criteria when judging a person’s ability to do something. Psychologists have named this kind of thinking as “halo effect” thinking. Below are some short examples of such thinking.
Imagine that you unfortunately injured one of your knees after tripping on something and that you will need to have surgery in a few weeks to repair the damage. You find that your local hospital has two surgeons who can repair your knee and of course you want to choose the best one. To make a decision as to which one of the two surgeons you want to operate on your knee, you make appointments to meet each of them.
The first surgeon you meet wears a very nice suit and has put on a perfectly matched tie. His hair is perfectly combed and in general, he looks great. You have a bit of a discussion with him and then go to see the other surgeon.
The other surgeon looks very different from the first one. His suit is shabby and a bit worn out. His tie does not match the suit and his hair is a bit messy as well. Essentially he does not look as great as the first surgeon.
Now, which surgeon will you choose to repair your knee ?
My guess is that if you are in this position in real life, that you would choose the well dressed surgeon as being the best one. This however would be an illogical choice, as the way a surgeon dresses has nothing to do with how good his surgical skills are. In fact, it may even be possible that the surgeon who is overly worried about his appearance may be really bad at how he operates. Perhaps a better way to work out which surgeon is better is to ask the surgeons for their success rate and maybe check online reviews about them.
Imagine that a certain car company makes very nice luxury cars. The cars are well made, have beautiful styling, and have very high quality engines. This car company then decides to also run a chain of luxury hotels and advertises this everywhere. Now imagine that there is a person called John who loves luxury cars and admires the car company a lot. One day, John decides to go on holiday and he needs to book a hotel room. Imagining that the hotels run by the car company would be as great as the cars they make, John promptly books a room at one of their hotels.
However, when John stays at the hotel run by the car company, he discovers, to his great disappointment, that the hotel is being run very poorly. The room is dark, the bed is very uncomfortable, and even the food is very ordinary. When booking the hotel room, halo effect thinking had made John wrongly assume that a company that makes good cars will also run hotels well, when in reality, making cars and running hotels are very different things.
As you have seen in the above examples, halo effect type of stupid thinking can cause one to make wrong decisions. When assessing a person, use only criteria that are relevant to what you are assessing.