“…To measure these functions in typology, Gray-Wheelwrights Jungian Types Survey (GW-JTS) and Myers-Briggs Type Indicator (MBTI) were developed and well used worldwide, but their forced-choice dichotomic format in measuring the bipolar assumption in psychological types has long been challenged and questioned ( Loomis, 1982 ; Girelli and Stake, 1993 ; Turcu and Minulescu, 2019 ) for producing spurious negative correlations among items ( Kerlinger, 1986 ), and their scoring system relying on this categorical approach results in distorting Jung’s theory and application ( Comrey, 1983 ; Carlson, 1989 ; Healy, 1989 ; McCrae and Costa, 1989 ; McCaulley, 1991 ; Merenda, 1991 ; Girelli and Stake, 1993 ; Harvey et al, 1995 ; Garden, 1997 ; Spoto, 2021 ). Complementary to these previous inventories, Singer and Loomis developed a Singer–Loomis type development inventory, SL-TDI ( Singer, 1996 ), to measure these functions and Jung’s psychological types with a Likert scale-based construct.…”