ISTJ

They work steadily to fulfill their commitments as promised and on time. They will go to almost any effort to complete something they see as necessary but will resist doing anything that doesn’t make sense to them. ISTJs generally prefer to work alone and be accountable for the results.

However, they are comfortable working as part of a team when that is necessary to do the job right, when roles are clearly defined, and when everyone fulfills assigned responsibilities. Competence and responsibility are extremely important to ISTJs, who expect others to be as dutiful and trustworthy as they require themselves to be.

ISTJs are clear and steadfast in their opinions because they have arrived at them by carefully and thoroughly applying logical criteria based on their experience and knowledge. They believe standard procedures exist because they work. They will support change only when facts demonstrate that it will bring about better results.

However, they generally don’t share their wealth of rich observations and memories except with close friends. Others see their standards and opinions, their desire for structure and schedules, but they may not see their individual, sometimes humorous, private reactions.

Although it can be hard for ISTJs to see the sense in needs that are very different from theirs, once they are convinced that something matters to a person they care about, that need becomes a fact. Then they will go to great lengths to meet the need, even while continuing to think it doesn’t make sense.

Others usually see ISTJs as