Compartmentalization is a subconscious psychological defense mechanism used to avoid cognitive dissonance, or the mental discomfort and anxiety caused by a person’s having conflicting values, cognitions, emotions, beliefs, etc. within themselves.
Compartmentalization allows these conflicting ideas to co-exist by inhibiting direct or explicit acknowledgement and interaction between separate compartmentalized self-states.
Those suffering from borderline personality disorder will often divide people into all good versus all bad, to avoid the conflicts removing the compartments would inevitably bring, using denial or indifference to protect against any indications of contradictory evidence.
Using indifference towards a better viewpoint is a normal and common example of this. It can be caused by someone having used multiple compartment ideals and having been uncomfortable with modifying them, at risk of being found incorrect. This often causes double-standards, and bias.
Read on to see why this is my current topic: