If a person with an abnormal behavior is unable to or unwilling to appreciate the extent of their problem or the impact it had on other people, what would psychologists say that person lacked?

Insight

Explanation:

In psychology, insight can mean the ability to recognize one's own mental illness. A person with very poor recognition or acknowledgment is referred to as having "poor insight" or "lack of insight".

i think its pulmonary not sure tho