“…Other factors that influence perception and thus diagnostic ability are: experience, background, scientific knowledge, the ability to observe carefully and to see relationships (Aspinall, 1981;Bircher, 1978;del Bueno, 1986;Durand, 1966;Edel, 1982;Komorita, 1967;Matthews and Gaul, 1979;Smith, 1986;Thiele, et. al., 1986).…”