title: Effects of content verbalness and intangibility on schizophrenics' deficits in abstract thinking.
mesh_terms: D003937:Diagnosis, Differential; D006801:Humans; D008297:Male; D001523:Mental Disorders / Q000175:diagnosis; D008875:Middle Aged; D012559:Schizophrenia / Q000175:diagnosis*; D012565:Schizophrenic Psychology; D013850:Thinking; D014936:Word Association Tests