Katie is a little "different" than others. She often feels as if deceased relatives are in the room with her. She believes she possesses a "sixth sense" by which she can read people's minds and foretell the future. She talks to herself frequently and often speaks to others in a meandering, vague, although not incoherent manner. She is often unkempt, believes people are talking about her, and tends to be socially aloof. She is most likely suffering from personality disorder.

Schizotypal personality disorder (STPD)

Explanation:

Schizotypal personality disorder (STPD) is a mental disorder that involves strange thought pattern or magical thinking, in which the sufferer often display an eccentric personality and exhibit behaviors that seem strange to people. Symptoms that characterized this type of personality disorder include paranoia, keeping alone, wearing of shabby and odd dresses, incoherent and vague speech, intense social anxiety, unusual thoughts and strange behaviors.