in Carl Jung’s analytic psychology, four personality types based on functions of the ego. Jung identified four functions, one of which typically dominates the conscious ego while the others remain unconscious. The individuated person (see individuation) will have integrated all the functions into his or her conscious personality. The functional types are (a) the feeling type; (b) the thinking type; (c) the sensation type; and (d) the intuitive type. See quaternity. See also attitudinal types.