ISTP (Introversion, Sensing, Thinking, Perception) is an abbreviation used in the publications of the Myers-Briggs Type Indicator (MBTI) to refer to one of sixteen personality types.[1] The MBTI assessment was developed from the work of prominent psychiatrist Carl G. Jung in his book Psychological Types. Jung proposed a psychological typology based on the theories of cognitive functions that he developed through his clinical observations.
From Jung's work, others developed psychological typologies. Jungian personality assessments include the MBTI assessment, developed by Isabel Briggs Myers and Katharine Cook Briggs, and the Keirsey Temperament Sorter, developed by David Keirsey. Keirsey referred to ISTPs as Crafters, one of the four types belonging to the temperament he called the Artisan. ISTPs account for about 4–6% of the population.[2]
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The MBTI preferences indicate the differences in people based on the following:[3]
By using their preference in each of these areas, people develop what Jung and Myers called psychological type. This underlying personality pattern results from the dynamic interaction of their four preferences, in conjunction with environmental influences and their own individual tendencies. People are likely to develop behaviors, skills, and attitudes based on their particular type. Each personality type has its own potential strengths as well as areas that offer opportunities for growth.
The MBTI tool consists of multiple choice questions that sort respondents on the basis of the four "dichotomies" (pairs of psychological opposites). Sixteen different outcomes are possible, each identified by its own four-letter code, referred to by initial letters. (N is used for iNtuition, since I is used for Introversion). The MBTI is approximately 75% accurate according to its own manual.[4]
According to Myers-Briggs, ISTPs excel at analyzing situations to reach the heart of a problem so that they can swiftly implement a functional repair, making them ideally suited to the field of engineering. Naturally quiet people, they are interested in understanding how systems operate, focusing on efficient operation and structure. They are open to new information and approaches. But contrary to their seemingly detached natures, ISTPs are often capable of humorously insightful observations about the world around them. They can also be closet daredevils who gravitate toward fast-moving or risky hobbies (such as bungee jumping, hang gliding, racing, motorcycling, and parachuting), recreational sports (such as downhill skiing, paintball, ice hockey, and scuba diving), and careers (such as aviation and firefighting).
ISTPs may sometimes seem to act without regard for procedures, directions, protocol, or even their own safety. But while their approach may seem haphazard, it is in fact based on a broad store of knowledge developed over time through action and keen observation. ISTPs enjoy self-sufficiency and take pride in developing their own solutions to problems.
ISTPs are content to let others live according to their own rules, as long as the favor is reciprocated. ISTPs endure reasonable impositions without complaint—but if their "territory" is encroached upon, eroded, or violated, they defend what they view as rightfully theirs.
According to Keirsey, Crafter Artisans are masters at using tools of every type—artistic, technological, martial. Although they are introverts, they are authoritarian in their interactions with others and can be forceful at influencing people. They focus on accomplishing tasks efficiently and skillfully.
To master the tool of their interest, ISTPs require a certain degree of seclusion in which to practice. The result is often a virtuosity that other types find difficult to match.[11]
Drawing upon Jungian theory, Isabel Myers proposed that for each personality type, the cognitive functions (sensing, intuition, thinking, and feeling) form a hierarchy. This hierarchy represents the person's so-called default pattern of behavior.
The Dominant function is the personality type's preferred role, the one they feel most comfortable with. The secondary Auxiliary function serves to support and expand on the Dominant function. If the Dominant is an information gathering function (sensing or intuition), the Auxiliary is a decision making function (thinking or feeling), and vice versa. The Tertiary function is less developed than the Dominant and Auxiliary, but it matures over time, rounding out the person's abilities. The Inferior function is the personality type's Achilles' heel. This is the function they are least comfortable with. Like the Tertiary, the Inferior function strengthens with maturity.[12]
Jung and Myers considered the attitude of the Auxiliary, Tertiary, and Inferior functions to be the opposite of the Dominant. In this interpretation, if the Dominant function is extraverted, then the other three are introverted, and vice versa. However, many modern practitioners hold that the attitude of the Tertiary function is the same as the Dominant.[4] Using the more modern interpretation, the cognitive functions of the ISTP are as follows:[12]
Ti seeks precision, such as the exact word to express an idea. It notices the minute distinctions that define the essence of things, then analyzes and classifies them. Ti examines all sides of an issue, looking to solve problems while minimizing effort and risk. It uses models to root out logical inconsistency.[13] ISTPs live in a world of logic, on which they base their decisions. They process information from their auxiliary function to create strategies for action at a moment's notice. They love to examine complicated systems.
Se focuses on the experiences and sensations of the immediate, physical world. With an acute awareness of the present surroundings, it brings relevant facts and details to the forefront and may lead to spontaneous action.[14] This function drives ISTPs to embrace opportunities to plunge headfirst into experiences. It also gives them a keen insight into situations similar to that of the ISTJ. Their curiosity for the world around them gives them a "leap before you look" tendency. They are notorious for taking apart a device to see how it works before considering whether they can put it back together.
Attracted to symbolic actions or devices, Ni synthesizes seeming paradoxes to create the previously unimagined. These realizations come with a certainty that demands action to fulfill a new vision of the future, solutions that may include complex systems or universal truths.[15] Never as open in their theorizing as INTPs, ISTPs prefer to keep themselves grounded in the physical situation, using Ni to visualize components and concepts that they cannot see and touch firsthand, such as the wiring in a circuit board.
Fe seeks social connections and creates harmonious interactions through polite, considerate, and appropriate behavior. Fe responds to the explicit (and implicit) wants of others, and may even create an internal conflict between the subject’s own needs and the desire to meet the needs of others.[16] A weak point of ISTPs, Fe may lead them to interpret criticisms of their ideas as criticisms of their competence. ISTPs strive to follow the edicts of logic, but when they are under stress, their inferior function can lead them to illogically and stubbornly cling to their own ideas—sometimes to their own detriment, or even when proven wrong.[12]
Later personality researchers (notably Linda V. Berens)[17] added four additional functions to the descending hierarchy, the so-called "shadow" functions to which the individual is not naturally inclined but which can emerge when the person is under stress. For ISTP, these shadow functions are (in order):
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