INFP/ISTJ: Fi/Si or Si/Fi--Avoidant Personality Disorder. Often scarred by some intensely negative past experience with opening up too many of their private emotions, this type compulsively avoids social situations and interaction with others. They are fiercely sensitive and may exaggerate or misconstrue perceived negative emotional intent in the words or actions of others. They will sometimes project their negative feelings onto others (Fi), as Si tells them that if I were to behave this way, I would have to be very upset, so anyone who behaves that way must also be. These types often have a chronic problem with trusting the intentions or motivations of others, refusing to share private information with even their closest friends and family. They are so deeply sensitive that they refuse to risk being hurt by attempting deep connections with others--you'll see this a lot in ISTJs with Asperger's. If Ne/Te were doing its job, these types would maintain a heathy grip on the importance of letting go of the past and trying something new in the name of accomplishing a greater goal, but some of these remain total recluses for most (if not all) of their lives.

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