Diagnosis and classification of psychopathology: challenges to the current system and future directions.

CONTENTS INTRODUCTION . .. ...... ........ ........ .... ........ 122 PURPOSES OF A DIAGNOSTIC TAXONOMy 122 Clinical Utility .... .. .. ........ 122 Research Facilitation 123 Scientific Understanding 123 DEV ELOPMENT OF DSM-IV 124 Descriptive Approach and the Structure ofDSM-IV 124 Process 125 DATA THAT CHALLENGE CATEGORICAL MODELS OF PSyCHOPATHOLOGy..... 126 Comorbidity 126 Heterogeneity 132 Organization Problems in DSM-IV 138 IMPLICATIONS FOR CHANGE IN THE TAXONOMy 141 Implications of Comorbidity .... .... ........ 141 Implications of Heterogeneity 142 Implications of Problems in Organization 142 RECONSIDERATION OF THE CLASSIFICATION SySTEM 144 Alternatives to a Phenomenological, Descriptive Approach 144 CONCLUDING REMARKS 147