DSM categories and dimensions in clinical and research contexts

Area of Science:

• Psychiatry
• Psychometrics
• Mental Health Diagnostics

Background:

• The Diagnostic and Statistical Manual of Mental Disorders (DSM) currently uses categorical diagnoses.
• There is ongoing consideration for an enhancement to the DSM-V.
• This proposed enhancement involves adding a dimensional adjunct to existing categorical diagnoses.

Purpose of the Study:

• To review the history and context of the proposal for dimensional adjuncts in the DSM.
• To define the core concepts underpinning the dimensional proposal.
• To illustrate the potential effects of incorporating dimensional measures into DSM diagnoses.

Main Methods:

• Review of historical context and conceptual underpinnings of dimensional measures in psychiatric diagnosis.
• Theoretical demonstration of the impact of dimensional adjuncts.
• Practical demonstration of the effects of dimensional adjuncts on DSM diagnoses.

Main Results:

• The advantages of dimensional over categorical measures are well-established.
• Demonstrations illustrate the potential positive effects of adding dimensional adjuncts.
• Potential objections to the proposal are considered.

Conclusions:

• The addition of dimensional adjuncts could enhance the reliability and validity of DSM diagnoses.
• Implementation criteria for this proposal are discussed.
• This enhancement represents a significant potential improvement in mental health diagnostics.