The operational paradigm in psychiatry: How valid is it?
1Clinica Universitária de Psiquiatria e Psicologia Médica, Faculdade de Medicina, Universidade de Lisboa, Lisbon, Portugal.
Journal of Evaluation in Clinical Practice
|October 20, 2023
Summary
Operational criteria (OC) in diagnostics were developed with validity in mind, not just reliability. Validation efforts have evolved from expert-driven to data-driven, seeking underlying causality for improved diagnostic accuracy.
Area of Science:
- Psychiatry
- Philosophy of Science
- Medical Diagnostics
Background:
- Diagnostic criteria, particularly since DSM-III, have faced criticism for prioritizing inter-rater reliability over validity.
- Despite criticisms, efforts were made to incorporate validity requirements during the development of these criteria.
- A significant misunderstanding persists regarding the epistemological underpinnings of the operational criteria paradigm.
Purpose of the Study:
- To analyze the epistemological context of the emergence of operational criteria (OC).
- To examine the validation processes that operational criteria have undergone since their inception.
Main Methods:
- Historical and philosophical analysis of the development of operational criteria.
- Review of validation methodologies employed, from initial expert-driven approaches to later data-driven strategies.
- Examination of influences on the development of operational criteria, including philosophical and medical specialty contributions.
Main Results:
- While Hempel's influence on operational criteria is discussed, it was not openly acknowledged by key developers (St. Louis group, DSM-III editors).
- Contrary to common assumptions, continuous attempts have been made to validate operational criteria since their conception.
- Validation evolved from an instrumental, utility-focused approach to seeking realistic validity through biological/psychological causality, incorporating measures like familial aggregation and prognostic indicators.
Conclusions:
- The development of operational criteria involved a complex interplay of influences and a persistent, albeit evolving, commitment to validation.
- Methodologies for validating operational criteria have become increasingly sophisticated, moving towards data-driven approaches and external construct measures.
- Understanding the epistemological foundations is crucial for appreciating the strengths and limitations of current diagnostic paradigms.
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