Feedback is more likely to affect learning, growth and change in areas that pose less of a threat to the recipient’s self-esteem.
Learning new skills is usually the easiest kind of change a person can make.
Changing someone’s attitudes and habits is possible but takes longer than the typical feedback process. Feedback directed to this type of change will need to be sustained over time and focused on long-term learning, not just immediate outcomes.
Changing the inherent personality traits is the most difficult and requires an intrinsic will of the person.