There are two groups of letters in the personality type code:
The dominant function of an ISFJ is the perceptive one of Sensing. This means you take a realistic approach, like looking at information in terms of facts and details, focus more on the here and now rather than possibilities for the future, and feel comfortable in areas of proven experience.
The perceptive Sensing function is introverted. That is, Sensing is used primarily to govern the inner world of thoughts and emotions. You seek to develop a realistic understanding of people as they are now and, being pragmatic in nature, adapt to the world as it is rather than trying to effect too much change. You observe in a subjective way, selecting and relating facts that others might not, whilst seeing those facts more in terms of their significance rather than pure 'data'.
The diagram represents how an average ISFJ uses all the functions. You can find out more about the diagram, and your personal, unique type dynamics, by completing our personality test.
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