This is a free online meaure of Cattell's 16 personality factors.
In his explorations of personality, British psychologist Raymond Cattell found that variations in human personality could be best explained by a model that has sixteen variables (personality traits), using a statisical procedure known as factor analysis. Following this discovery he went on to create and promote the 16PF Questionnaire. This test uses a public domain scales from the Internation Personality Item Pool to measure the same traits.
This personality test consists of 164 statements about yourself, for each indicate how accurate it is on the scale of (1) disagree (2) slightly disagree (3) niether agree nor disagree (4) slightly agree (5) agree. It will take most people around ten minutes to complete.
This test should be taken for educational purposes only. It is not a substitute for any type of professional service, medical or otherwise. You answers on this test will be stored and used for research, and possibly shared in a way that preserves your anonymity.