The diagnostic instability of eating disorders suggests that:

Question

BlackTom AI · Accepted Answer

Diagnostic instability means individuals often move between eating disorder diagnoses over time, so a transdiagnostic perspective is most useful.

1) Relevant knowledge points and concepts
- Diagnostic instability: longitudinal studies show many people shift between anorexia nervosa, bulimia nervosa, binge-eating disorder, and OSFED across months to years rather than staying fixed in one category.
- Transdiagnostic model: proposes shared etiological and maintenance mechanisms (e.g., overvaluation of weight/shape, dietary restraint, mood dysregulation, perfectionism, cognitive rigidity, and maladaptive coping) that underlie different eating-disorder presentations.
- Clinical implication: focusing on common mechanisms can better account for changing symptom profiles than treating each diagnostic label separately.

2) Step-by-step reasoning
- Empirical observation: a patient may present initially with restrictive behaviors (anorexia nervosa) and later develop binge–purge behaviors (bulimia) or subthreshold symptoms.
- If core maintaining processes remain (e.g., extreme concern about shape/weight and compensatory behaviors), the surface diagnosis changes while underlying pathology persists.
- Therefore, understanding and treating the stable, cross-cutting processes explains the trajectory more coherently than rigid diagnostic categories.

3) Calculations
- Not applicable; this is conceptual/clinical reasoning.

4) Why the correct answer is correct
- The statement “An individual’s eating disorder trajectory can often be best understood through a transdiagnostic lens” captures that diagnostic labels shift but shared mechanisms persist, which is precisely what diagnostic instability implies and what transdiagnostic models address (e.g., Fairburn’s CBT-E).

5) Why other options are incorrect
- “Individuals recover from one and subsequently develop another”: possible in practice but is a narrower, less general implication than diagnostic instability, which emphasizes fluctuation rather than a simple sequence of recovery and new onset.
- “Simultaneously diagnosed with overlapping disorders”: diagnostic instability refers to change over time, not simultaneous comorbidity.
- “Should not be provided with a specific diagnosis”: instability doesn’t argue against diagnosis; it argues for treatment approaches that target shared mechanisms, while diagnosis can still guide care.

6) Conclusion
- The correct answer is: An individual’s eating disorder trajectory can often be best understood through a transdiagnostic lens. This matches the provided answer.

The diagnostic instability of eating disorders suggests that:单项选择题

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