The PHQ-9 is a multipurpose instrument for screening, diagnosing, monitoring and measuring the severity of depression:

  • The PHQ-9 incorporates DSM-IV depression diagnostic criteria with other leading major depressive symptoms into a brief self-report tool.
  • The tool rates the frequency of the symptoms which factors into the scoring severity index.
  • Question 9 on the PHQ-9 screens for the presence and duration of suicide ideation.
  • A follow up, non-scored question on the PHQ-9 screens and assigns weight to the degree to which depressive problems have affected the patient’s level of function.
The Eysenck Personality Inventory (EPI) measures two pervasive, independent dimensions of personality, Extraversion-Introversion and Neuroticism-Stability, which account for most of the variance in the personality domain. Each form contains 57 “Yes-No” items with no repetition of items. The inclusion of a falsification scale provides for the detection of response distortion. The traits measured are Extraversion-Introversion and Neuroticism. When you fill out Eysenck’s Personality Inventory (EPI) you get three scores.

  • The ‘lie score’ is out of 9. It measures how socially desirable you are trying to be in your answers.Those who score 5 or more on this scale are probably trying to make themselves look good and are not being totally honest in their responses.
  • The ‘E score’ is out of 24 and measures how much of an extrovert you are.
  • The ‘N score’ is out of 24 and measures how neurotic you are.