title: The specificity of thought disorder to schizophrenia: research methods in their historical perspective.
mesh_terms: D001244:Association; D001288:Attention; D003072:Cognition Disorders / Q000523:psychology*; D003210:Concept Formation; D006801:Humans; D012107:Research Design; D012564:Schizophrenic Language; D012565:Schizophrenic Psychology