“…Questionnaires to measure these hypothetical personality types have been constructed (e.g. Jenkins, Zyzanski, Ryan, Flessas & Tannenbaum, 1977;Eysenck & Fulker, 1983, for CHD;Grossarth-Maticek & Eysenck, 1990, for cancer). There are two ways of providing construct validity, namely (1) demonstrating that probands high on Type C are diagnosed as suffering from cancer, while probands high on Type A are diagnosed as suffering from coronary heart disease, more frequently than vice versa, and that probands of Type B are found to be healthy.…”