ISTJ vs ISFJ

ISTJ

The Inspector

ISFJ

The Defender

Personality

Logical, detached and detailed, ISTJs use their experience and store of knowledge, to plan and will work quietly and steadily behind the scenes towards conclusion. The ISTJ has a strong sense of duty, loyalty and tradition and once they are clear on what’s expected, they will work in a methodical way to complete. Risk averse they prefer the known, and prefer facts to concepts.

ISFJs are quiet, and often understated people-centric doers. Conscientious and hardworking, they are loyal and dedicated to people and organisations, and they take their responsibilities very seriously. They have an incredible store of knowledge and superb memory used to support people and solve problems. Shunning the limelight the ISFJ is often the one who quietly make it all happen.

At Work

We all bring something different to the team and we all agree that difference and balance are good things. However when someone is different from us we might not understand them so well so in this section we allow you to compare the differences at work, how these might manifest themselves and how best to manage them.

Contribution to the team

ISTJs bring a strong sense of planning, agreeing objectives and working steadily towards closure. They have a strong eye for detail and can therefore protect the team from going off in a wrong direction.

Contribution to the team

The ISFJ will bring order, clarity, organisation and planning. Although not the most vocal member of the team, the ISFJ will make sure the team moves towards a 'known' conclusion in a planned way.

Leading

ISTJs will be great at ensuring everyone is clear on what is expected, everyone knows what the plan is and their part in it and ensuring that the plan is enacted, so more task- than people-focused.

Leading

ISFJs are more of the behind the scenes operators rather than being a charismatic leader. Yet their incredible memory, their caring and practical nature and planning ability make them good team leaders.

Being managed

Best managed by clear tasks, ISTJs need plenty of time to fully understand what is expected then let them get on, working with consistent steady energy towards completion, not micro managed.

Being managed

Ironically, because they prove over and over that they can be relied on for their loyalty, attention to detail and high-quality work they can be taken for granted. Give them clarity and trust, they will deliver.

Attention to detail / focus

ISTJs have and incredible eye for detail, focus and a desire to drive for closure. They will want to slowly assimilate information and be sure of their facts before moving forward and this will be as per the plan.

Attention to detail / focus

The ISFJ is painstaking, orderly, conscientious and anxious with a superb capacity for follow-through although they have a tendency to worry about the smaller things and a reluctance to ‘let go.’

Creativity

ISTJs are more factual than creative and their value is exactly that: ensuring that was has been agreed is delivered exactly as agreed and translating everything into a plan that is clear and can be delivered.

Creativity

ISFJs have a great memory for facts and superb attention to detail. They will be more factual and practical than overtly creative, motivated by an internal anxiety to ensure the team doesn’t fail.

Conflict

Some people seek harmony, some see conflict as simply robust discussions, some people are emotional, some more factual. So there is no right or wrong about this and what we are trying to do is help two different people each understand how the other might deal with conflict and what it will mean for how they work together.

Initial response to conflict situations

ISTJs prefer to keep themselves to themselves and so in conflict situations they will struggle with overt conflict, ie with someone who wants to engage verbally. They are fine with more formal conflict.

Initial response to conflict situations

The ISFJ will initially close down on conflict as they prefer harmony and indeed will work hard at creating that. Indeed the ISFJ will be a superb diffuser of conflict but they themselves do not enjoy it.

Issues they'll fight on

ISTJs have a strong sense of right and wrong and this tends to be around what has been agreed. They believe if you have said you’ll do something then it is akin to a contract and you should fulfil that

Issues they'll fight on

ISFJs are often called ‘the defender’ and this is because they will stand up for what is right and the rights of others. So whilst they may shun conflict personally, they will fight for other people.

Conflict style / communication

Formal processes such as writing letters of complaint or going through the proper channels plays to ISTJ strengths. They are measured and formal and so will be very factual and non-emotional.

Conflict style / communication

Naturally more quiet and low key, the ISFJ will be conciliatory and seek consensus preferring to see good in people and they will look to get to a resolution that makes everyone happy.

How they feel after

It is all about right and wrong. ISTJs do not like conflict if it involves emotion, as they prefer to see things far more factually and in a binary way. For them it will be about did it play out fairly and as agreed?

How they feel after

Altercations and over interaction in general sucks the energy of the ISFJ and so they will need some private ‘me’ time to recharge their batteries and build up their energy levels.

Interpersonal

We all have different motivators, values and views on the world, in part driven by our personalities. The section below describes how each person is likely to engage with others, and how others may see them.

Being around them

Because of their intense focus ISTJs may be seen as slightly detached, cold and impersonal, possibly even as uncaring. This is not deliberate but it can alienate those trying to get close or get to know them.

Being around them

ISFJs are deep and caring with strong values and these will be held privately until the ISFJ allows people in. What others will perceive is a helpful, supportive, patient and detailed individual who is under the radar. The ISFJ is sociable but doesn’t like the spontaneity of crowds.

Dealing with emotions

Detached and factual ISTJs often find it difficult to deal with emotions as they see this as irrational and when others display emotions they have to translate the emotion into factual language that they can understand.

Dealing with emotions

The ISFJ is an emotional type, but may struggle at times to deal with these, as they are so private and reflective. It may be possible to deeply offend an ISFJ and not realise it, so private are they.

Openness and sharing feelings

Deep and private ISTJs will tend to keep their feelings to themselves and until they have the measure of people will be unlikely to proactively share their feelings. Too much interaction sucks their energies.

Openness and sharing feelings

Once allowed close the ISFJ will open up but it will take time and they are not naturally forthcoming. This may mean it emerges in small chunks, often off the back of other conversations.

Drivers and values

ISTJs like people to stick to agreements and commitments and may not understand that this is human nature, not human deficiency as they themselves take such commitments incredibly seriously.

Drivers and values

ISFJs have a strong sense of what is right and wrong and will tend to do what they believe is right, even at the expense of themselves. They really do want to support, care and are generous with their time.