It seems there might be some confusion or misunderstanding with the terms you've mentioned. Let's clarify the differences between them:
Grant Function Type: This term is unfamiliar, and I couldn't find any references or established concepts related to "Grant function type" in the context of personality psychology or the Myers-Briggs Type Indicator (MBTI). It's possible that it might refer to a specific interpretation or concept by a particular author or website, but without more information, it's challenging to provide a clear explanation.
Myers Function Type: Similarly, there is no recognized concept of "Myers Function Type" within the standard MBTI framework or personality psychology. The official MBTI theory does not use this terminology.
Myers-Briggs Type: The Myers-Briggs Type Indicator (MBTI) is a widely-used personality assessment that categorizes people into 16 different personality types based on four dichotomies: Extraversion (E) vs. Introversion (I), Sensing (S) vs. Intuition (N), Thinking (T) vs. Feeling (F), and Judging (J) vs. Perceiving (P). For example, INFP, ENFP, INFJ, etc., are all MBTI types.
It's important to note that the MBTI measures a person's preferences in each dichotomy, and it is not directly related to cognitive functions. However, many MBTI enthusiasts and researchers believe that each MBTI type has a specific pattern of cognitive functions associated with it.
Cognitive functions are theoretical building blocks that describe how individuals gather and process information based on the works of Carl Jung, who influenced the development of the MBTI. There are eight cognitive functions, organized into four pairs: Extraverted Thinking (Te), Introverted Thinking (Ti), Extraverted Feeling (Fe), Introverted Feeling (Fi), Extraverted Sensing (Se), Introverted Sensing (Si), Extraverted Intuition (Ne), and Introverted Intuition (Ni). Each MBTI type is believed to have a dominant function, auxiliary function, tertiary function, and inferior function.
Based on the information you provided, it appears that there might be some mix-up in the terms used. It's important to be cautious about online tests and interpretations of personality types, as some sources may not adhere to the standard MBTI framework. For accurate and reliable results, consider taking the official MBTI assessment from qualified practitioners or experts in the field of personality psychology.