Pratfall effect

In social psychology, the pratfall effect is the tendency for interpersonal appeal to increase or decrease after an individual makes a mistake, depending on the individual’s perceived ability to perform well in a general sense. Wikipedia

The Pratfall Effect states that people who are considered highly competent are found to be more likeable when they perform an everyday blunder than those who don’t. The effect was first studied by social psychologist Elliot Aronson in 1966.