Dr. Leung is using self-reports to assess psychopathology.
Step-by-step explanation:
A self-report is study conducted on a person to about himself. A self-report data is obtained by making the respondent/participant respond to the survey, questionnaire, or poll by themselves without interference. The self-report is used to know about the feelings, attitudes and beliefs of the participant.
Self-report measures are obtained based on the information provided directly by participants about themselves through a question-and-answer format. The self-report data is considered reliable in many medical contexts.
Self-report helps us to find the sleeping and eating habits, daily activities, and emotional state of a person.