Abstract: The present invention is directed to methods of diagnosing a psychological condition and/or the events or perceived events that are the basis of the condition. In another embodiment the present invention is directed to a method of assigning a personality classification to an individual. The methods of the invention preferably comprise the steps of: asking the individual a plurality of questions designed to bring out an emotional response in the individual; observing all repetitive physical movements by the individual while the individual is responding to the questions asked; identifying nonverbal leaks (NVL) from the observed repetitive physical movements reflecting an unresolved perceived trauma in the individual; and diagnosing a psychological condition in the individual or assigning a personality classification to the individual based on the individual's identified NVLs. The present invention is further directed to identifying the underlying cause of the perceived trauma, thereby treating the individual.