The Lscher-Color-Diagnostic measures a person's psycho-physical state, his or her ability to withstand stress, to perform, and to communicate. It uncovers the cause of psychological stress, which can lead to physical symptoms. Using 5015 precise definitions, the selections from among these pre-determined test colors measure the state of 34 personality traits, some of which lie outside the realm of the conscious. Because the color selections are guided in an unconscious manner, they reveal the person as he or she really is, and not as he or she perceives him - or herself, or as he, or she would like to be perceived, which occurs when questions are asked directly or by questionnaires.