Title: Strategist
Content:  Strategists are known to have an INTJ personality trait, based on the Myers-Briggs Type Indicator (MBTI). The MBTI was derived from Psychiatrist Carl Jung theory of psychological types enabling us to have a better understanding of people's personality traits and what their strengths are as a person, although the research shows MBTI to be an unreliable measure of categorising personality types. It is commonly found that strategists are more prone to possess a combination of 4 specific personality traits, which includes Introversion, Intuition, Thinking and Judgment (forming the acronym INTJ). However, this combination of personality traits is known to be very rare among people, making strategists to be very sought after especially by major firms. Dr. Vladimir Kvint defined strategist as a wise, disciplined, and optimistic professional with a strategic mindset, a vision of the future, and intuition. It is possible at times to find that the vision or ideas of a strategist may not be align with conventional ideas which can make it difficult for others to accept or envision.
Title: Keirsey Temperament Sorter
Content:  Myers' combinations of preferences: Guardians with sensing plus judging (SJ); Artisans with sensing plus perceiving (SP); Idealists with intuition plus feeling (NF); and Rationals with intuition plus thinking (NT). Myers paired ESTJs with ENTJs, ISFPs with INFPs, INTPs with ISTPs, and ENFJs with ESFJs because they share the same dominant function attitude. ESTJs and ENTJs are both extraverted thinkers, ISFPs and INFPs are both introverted feelers, INTPs and ISTPs are both introverted thinkers, and ENFJs and ESFJs are both extraverted feelers. Keirsey holds that these same groupings are very different from one another because they are of different temperaments. ESTJs are Guardians whereas ENTJs are Rationals; ISFPs are Artisans whereas INFPs are Idealists; INTPs are Rationals whereas ISTPs are Artisans; and ENFJs are Idealists whereas ESFJs are Guardians.
Title: Myers–Briggs Type Indicator
Content: poor validity (i.e. not measuring what it purports to measure, not having predictive power or not having items that can be generalized); ; poor reliability (giving different results for the same person on different occasions); ; measuring categories that are not independent (some dichotomous traits have been noted to correlate with each other); ; not being comprehensive (due to missing neuroticism). Several terms (e.g., ISTJ and ENFP) redirect here. These are Myers–Briggs personality types but are also used in Socionics and the Keirsey Temperament Sorter.  In personality typology, the Myers–Briggs Type Indicator (MBTI) is an introspective self-report questionnaire indicating differing psychological preferences in how people perceive the world and make decisions. The test attempts to assign four categories: introversion or extraversion, sensing or intuition, thinking or 
Title: Jungian cognitive functions
Content:  Isabel Myers, an early pioneer of psychometric formalized these ideas and proposed that the mixture of types in an individual's personality could be measured through responses to a personality test she devised along with her mother, Katharine Cook Briggs, the Myers-Briggs Type Indicator. In this model, four "dichotomies" are defined, each labelled by two letters (one for each of the opposites in question), as shown by the emboldened letters in the table. Individuals' personalities fall into sixteen different categories depending on which side of each dichotomy they belong to, labelled by the four applicable letters (for example, an "ESFP" type is someone whose preferences are extroversion, sensing, feeling and perceiving).
Title: Taylor-Johnson Temperament Analysis
Content:  Taylor-Johnson Temperament Analysis (T-JTA) is a personality test designed to measure nine common personality traits for the assessment of individual adjustment. The T-JTA is a revision by Robert M. Taylor and Lucile P. Morrison of the Johnson Temperament Analysis (JTA) developed by Dr. Roswell H. Johnson in 1941. The T-JTA was designed to measure personality variables or attitudes and behavioral tendencies that are claimed by the test's authors to influence personal, social, marital, parental, family, scholastic, and vocational adjustment. The Taylor-Johnson Temperament Analysis and its acronym are registered trademarks of its publisher, Psychological Publications, Inc.
Title: Personality test
Content:  setting. It can also be used to assess the Personality Psychopathology Five (PSY-5), which are similar to the Five Factor Model (FFM; or Big Five personality traits). These five scales on the MMPI-2 include aggressiveness, psychoticism,, negative emotionality/neuroticism, and introversion/low positive emotionality. ; Myers–Briggs Type Indicator (MBTI) is a questionnaire designed to measure psychological preferences in how people perceive the world and make decisions. This 16-type indicator test is based on Carl Jung's Psychological Types, developed during World War II by Isabel Myers and Katharine Briggs. The 16-type indicator includes a combination of Extroversion-Introversion, Sensing-Intuition, Thinking-Feeling and Judging-Perceiving. The MBTI utilizes 2 opposing behavioral divisions on 
Title: Intelligence and personality
Content:  is a personality trait that is related to rumination and compulsive thinking about possible threats. Similarly, agreeableness is a personality trait that is related to the consideration of others' mental states. The finding that IQ predicts work performance, academic achievement, and health might also point to a link between intelligence and personality, or else be grounds for further research into their relationship. In considering the ties between intelligence and personality, it may be worth noting that they are typically not tested in the same way. Intelligence is assessed using ability tests (such as I.Q. tests), whereas personality is assessed using questionnaires. It has been suggested that intelligence should reflect an individual's maximal performance, while personality should reflect their typical behaviour.
Title: Taylor-Johnson Temperament Analysis
Content: Nervous ↔ Composed ; Depressive ↔ Lighthearted ; Active-Social ↔ Quiet ; Expressive-Responsive ↔ Inhibited ; Sympathetic ↔ Indifferent ; Subjective ↔ Objective ; Dominant ↔ Submissive ; Hostile ↔ Tolerant ; Self-Disciplined ↔ Impulsive The Taylor-Johnson Temperament Analysis measures 9 personality traits and their polar opposites.  The test consists of 180 questions equally divided among the nine bipolar traits measured by the test. The T-JTA provides an evaluation in visual form that portrays the respondent's feelings about himself or herself. In addition, the respondent can answer the questions as they apply to a significant other.
Title: Jungian Type Index
Content:  Similar to the MBTI, the JTI identifies four categories from which the 16 types are formed: Extraversion/Introversion, Intuiting/Sensing, Thinking/Feeling, Perceiving/Judging. A personality type is reached through an examination or introspection about these categories. For example, an Intuiting, Thinking, Judging Extravert would be classified as an ENTJ. However, further complexity lies below this surface-level classification. Each personality type has its associated Jungian cognitive functions, which aim to further explain the ways in which people with each type perceive and interact with reality. Each type has all four of the cognitive functions (Thinking, Feeling, Intuiting, and Sensing) arranged in a different order and with different levels of introversion/extraversion. Of the two middle letters of any type, one will be the primary function with which they interact with the world, and one will be the auxiliary. For example, an ENTJ's primary function is (extraverted) Thinking, and their secondary function is (introverted) Intuiting.
Title: Myers–Briggs Type Indicator
Content:  One study found personality disorders as described by the DSM overall to correlate modestly with I, N, T, and P, although the associations varied significantly by disorder. The only two disorders with significant correlations of all four MBTI dimensions were schizotypal (INTP) and obsessive-compulsive personality disorder (ISTJ).

Question: what does istj mean in a personality test?
Answer: Extroverted Thinking (Te).
Extroverted Intuition (Ne).
Introverted Sensing (Si).
Introverted Feeling (Fi).