In relationships, the ISTJ is loyal and reliable. ISTJs have a strong respect for tradition and often assume typical gender roles in their relationships, with male ISTJs taking on the role of provider and female ISTJs caring for home and family. ISTJs value stability, and tend to appreciate relationships that they can count on over the long term. They keep their promises and expect others to do the same.
ISTJs are resoundingly logical and can be stubborn once they've decided on the best course of action. They usually like things done their way. Often the "proper" course of action is self-evident to the ISTJ, who may have little patience with unconventional approaches.
ISTJs tend to work hard to ensure that their families are provided for and that they are living up to their own expectations of what a good partner should be. They are typically most satisfed with a partner who can recognize and appreciate the hard work they put in to contribute to the household.
As parents, ISTJs are firm in their expectations and consistent in enforcing rules. They rarely dote on their children, but provide stability, structure, and the practical necessities of life. They may be strict and often emphasize traditional values like responsibility, loyalty, and obedience.
ISTJ parents want to pass on traditions and teach their children how to fit into society. They expect their children to be as dutiful as they are, and concern themselves with teaching their children to work hard, respect authority, and care for their material possessions.
ISTJs communicate in a direct and straightforward way. They are specific and oriented to details, and often communicate primarily to move a task along. The ISTJ typically has a great memory for detail and has a vast storehouse of practical, factual information. Most ISTJs don’t talk for the sake of talking, but will share their knowledge when they see a practical need for it. ISTJs are often no-nonsense and action-oriented in their communication; they tell what they know and what needs to be done.