Dr. MM House classified patients' psychology into four types for house classification in 1950:
1. Philosophical - Easygoing and confident in dentists with excellent prognosis.
2. Exacting - Intelligent and methodical but demanding with good prognosis.
3. Hysterical - Emotionally unstable and never satisfied with good to poor prognosis.
4. Indifferent - Unconcerned about dental treatment and difficult to motivate with good prognosis.
House also categorized patients as cooperative or uncooperative. Cooperative patients accept treatment readily while uncooperative patients are difficult to treat due to their negative attitudes. Understanding patients' expectations and psychological profiles is important for achieving patient satisfaction and successful dental treatments