Introversion
Awareness directed inward, toward one's own Cognition
Introversion is the use of the self as the subject of cognition. Introversion is thus the internal awareness of the psyche - that which is produced by the individual.
A responding type prefers to maintain equilibrium using introverted cognitive functions.
Extraverted cognitive functions:
Fire (Ni)
Earth (Si)
Sword (Ti)
Spear (Fi)