According to the MBTI model, the ISTJs are mainly oriented towards introverted sensing (Si). This orientation reveals a more subjective perspective for problem-solving, based on relating and comparing previous experiences to new ones. Secondarily, the extraverted thinking (Te) composes this type’s analytical and strategic approaches for decision-making, always in a logical way. These are the main ‘cognitive functions’ that characterize the ISTJ type. The model extends to other functions considered inferior or/and unconscious, summing up to 8 cognitive functions.
According to David Keirsey, ISTJ’s are inclined to commerce, executive positions, logistic, and conservatism. Keirsey emphasizes their communicative, phlegmatic, pessimistic, and cooperative skills characteristics. They are also described as people who prefer sharing concrete ideas, like to do or have what brings them a feeling of security, having obedience, and respect for authorities. ISTJs are often seen as a simple person who likes to keep things stable and in order. When acquiring something, they care more about actual quality than status. For Keirsey, this type values ceremonies and events as traditional treasures. As mates, they tend to be loyal and dutiful for a lifetime. As parents, they make sure their rules are followed in every detail and instruct them on daily home chores, reserving not much of their time for playing.
Other characteristics of ISTJs reported by Isabel and Peter B. Myers are their interest in dealing with high amounts of information, practical and systematic thinking, patience, cautiousness, focus on details, determination, tolerance to routine, and tendency to underestimate themselves.
By: Regina Burde- “Someone who likes to explore human behavior, be it through the perspective of arts or science.”
Keirsey, D. (1998). Please Understand Me II: Temperament Character Intelligence. Prometheus Nemesis Book Company. 1 edition.