INFJ vs INTJ Part 2Posted: November 21, 2012
In introverted types, Introverted Judging [J]i function is responsible for organizing the internal world.
Dominant introverted judgers such as INTP/ISTP and INFP/ISFP create an internal model of the world and filter their perceptions to harmonize with it. They spend most of their energy re-organizing their internal world to maintain harmony or consistency.
INTJ and INFJ are dominant perceivers, despite the J in the letters. They do not have a solid internal model but a constantly evolving network of perceptions and insights that serves as a tool for understanding the world. The fluidity of Ni requires an introverted judging function to maintain a degree of stability and sense of self.
INFJs use Ti as their tertiary function.
INTJs use Fi as their tertiary function.
The different tertiary functions are responsible for the differences in decision making processes and thought patterns between the two types.
In most types, the tertiary function serves as a crutch when the first two functions fail to meet the demands of the environment. Ni dominants rely on their extraverted judging functions (Te/Fe) to deal with novel situations in the environment. The extraverted judging processes conform to commonly accepted methods of thought and behavior. In INFJs, this takes the form of subscribing to social values and behaving appropriately. In INTJs, it is seen as reliance on established facts and accepted modes of thinking. These objective judging functions are usually sufficient for most situations. However, these functions can be challenged when the person faces a challenge that requires decision making on subjective grounds.
The INFJ that is accustomed to using Fe may not know how to decide when presented with multiple options that are equally appropriate or have similar effects on others.
The INTJ that has relied on objective facts may not know which path to take when presented with questions on matters that cannot be verified through empirical means.
In these situations, the person retracts into the internal world and relies on the tertiary function to present a solution. This is especially stressful in [P]i (Ni/Si) dominants because both the auxiliary and tertiary function are judging functions and are opposed to each other. (Fe/Ti in INFJs and Te/Fi in INTJs) The extraverted judging functions have a quality of urgency but the introverted judging functions are complacent and take time to process. In addition, the functions are opposed (Feeling vs Thinking) so the person will need to suppress one for the other to function.
An INFJ and an INTJ have been invited to different social events they find equally interesting may have trouble deciding which one to attend.
The INFJ will initially use Fe to consider the importance of the person who invited her and how it would impact their relationship. She will project how the decision will affect her social relationships, public image, the amount of social interaction involved and her preparedness for the environment (attire, mood, etc…). If she is unable to make a decision based on these factors, she turns to her tertiary function, Ti to analyze her options. She will reflect on her worldview and philosophy to find principles (Ti) that reinforce her visions and goals (Ni). She may consider what she would learn from the events and how it could help her achieve her goals or refine her understanding of people or the world.
The INTJ will consider the convenience and pros/cons of attending the events. He will use Te check if they are compatible with his schedule and the plans he has made for the day. He will think about how the events would benefit him and which would yield a greater return (in tangible goods or simply pleasure) on the time and cost invested. He may consider the location of the events, the risk of accidents and other mishaps, and the worst and best possible outcomes. If Te does not provide a good reason to choose one over the other, he will come back to himself and reflect on his personal values (Fi) and how each event harmonizes with it. He will introspect on the reasons behind his interest in the events and think about how it would help him understand himself better.
INFJs values usually resonate with their surroundings and prefer to subscribe to an external standard (Fe). Their values are usually learned from an early age and they usually reflect the cultural environment they were raised in. When it comes to moral decisions, INFJs are flexible and may adjust their beliefs to adjust for the situation. They may analyze situations based on group dynamics, individual differences, and other measures they can use to plan their speech and actions. (Ti). For this reason, they can explain their decision making process more easily than INTJs. Relationships and one-on-one communication can be stressful for INFJs because they create models of how other minds work, and they adjust their attitudes and opinions to fit other individuals’ needs. Their moral decision making can be intellectual and they may suspend their immediate instinctual reactions to sudden events to predict which actions lead to the greatest good. They expect their values to be universal and may set high standards for themselves and others to reach their external ideal.
INTJs base their values on internal standards of integrity, self-honesty, charity and other virtues that revolve around their sense of self. (Fi) They usually have a strong will and are aware of their wants and preferences from an early age. When it comes to relationships, they have an easier time evaluating others and deciding if a person meets their standards. (Te) Competence is a core value shared by most INTJs, they value independence and ability in themselves and others. For this reason, they devote much of their energy mastering skills and assessing themselves using objective methods. If their Fi is well developed, they may have a fascination with ideals such as universal good and evil. They like to have freedom in making moral decisions and can sometimes despise societal values they find pointless. When confronted with decisions that require quick moral judgment, they turn to their heart and make decisions based on what feels right (Fi) despite the resistance of their intellect (Te). When it comes to people and relationships, they judge people based on their qualities and are more comfortable with dismissing those with different values.
INFJs use Ni-Ti to form their ideas and express them through Fe.
INTJs generate interest using Ni-Fi and think through Te.
INFJs tend to be terse and dispassionate (Ti). They craft their thoughts internally and express them in an appropriate fashion (Fe). Their speech is brief and they may pause between sentences when they are processing. (Ti) For this reason, they usually prefer writing to speech because it gives them time to choose words, tone and other subtleties.
INTJs are verbose and direct. They can be passionate about ideas (Fi) and may disregard tact and others’ feelings because they organize their thoughts as they speak. Their speech has a flow and they can instantly organize their ideas into bullets or numbers. (Te) They prefer to make charts, graphs, and drawings to share their explicit logic.