Neuro-Psyche Cognitive Typology Index, or more abbreviated as N-PCTI, is a tool for understanding the mechanism to solve Jungian Psychological Functions by its functional approach, in a sense that the 8 types, according to Psychological Types, since it does posses the qualities or characteristics of 8 types yet based upon the premise that your type can be developed and changed throughout the course of life, with in which basis has a notion about particular usage of functions that might be dynamic but remaining certain, and this also is a notion or distinct understanding about Psychological Functions, so just to keep in mind that this system is nowhere related to MBTI, since it's merely based upon Jungian theories, or else, Freudian concept of Ego and ID. And perhaps, it's also beneficial as a conception to understand whether you represent the archetype of functions on itself or not, since the archetype represents the quality or characteristic of dominant function as the representation of a primary type on itself. And therefore, this tool of understanding will not use 8 functions to describe the attitude of types by its stacking, since there only are 4 functions with 2 different attitudes instead, which consist extraversion and introversion or in other words, unconsciousness and consciousness.