The Design of Everyday Things A Book by Don Norman When engineers refuse to leave well enough alone uxdesignobjects
Four stages of competence An Idea en.wikipedia.org In psychology, the four stages of competence, or the "conscious competence" learning model, relates to the psychological states involved in the process of progressing from incompetence to competence in a skill. Unconscious incompetence Conscious incompetence Conscious competence Unconscious competence Good design can copy learningskillprogress