what is tangential thinking a sign of
Thought disorder (TD) or formal thought disorder (FTD) refers to disorganized thinking as evidenced by disorganized speech. Specific thought disorders include derailment, poverty of speech, tangentiality, illogicality, perseveration, neologism, and thought blocking. Psychiatrists consider formal thought disorder as being one of two types of disordered thinking, with the other type being delusions.