They need feedback. The word feedback initially came from rocket science and referred to information that signals a rocket if it is on or off-target and enables it to make necessary corrections. In human terms feedback is information given to someone about how they are performing relative to a target, goal, or standard. This information allows a person to regulate his or her behavior. Feedback can be positive when the person is on track to achieve or exceed the goal, or corrective when the person is off target and needs to do something differently.
Corrective feedback is also beneficial.
Without it, we can blissfully maintain the illusion that what we re doing is all right when it s not. If someone doesn t know they re doing anything wrong, they need information in order to correct their mistakes. Even when someone already knows that they re doing something wrong corrective feedback can help. People are not likely to change when they don t realize the impact of what they re doing or when no one pays any attention to them. Feedback shows that you care enough to pay attention and to share what you know in a helpful way.