It is true about Bulimia Nervosa that:

Question

BlackTom AI · Accepted Answer

The core psychopathology of bulimia nervosa is an undue influence of body shape and weight on self-evaluation: this is a required diagnostic feature in DSM-5 and drives the cycle of binge eating and compensatory behaviors.

1) Relevant knowledge points and concepts
- DSM-5 criteria for bulimia nervosa include: (a) recurrent episodes of binge eating, (b) recurrent inappropriate compensatory behaviors to prevent weight gain (e.g., vomiting, laxatives, fasting, excessive exercise), (c) these behaviors occur on average at least once a week for 3 months, (d) self-evaluation is unduly influenced by body shape and weight, and (e) the disturbance does not occur exclusively during episodes of anorexia nervosa. Typical weight for people with bulimia is often within the normal or above-normal range, not markedly low. Purging without binge eating is classified differently (purging disorder). Research shows gender-diverse people often have equal or higher risk of eating disorders, not lower.

2) Step-by-step reasoning
- Option A states self-evaluation is unduly influenced by shape/weight. This matches DSM-5 criterion (d) directly.
- Option B claims patients are usually at a low weight. Compare to DSM-5: low weight is characteristic of anorexia nervosa; bulimia patients are frequently of normal or above-normal weight. So B is incorrect.
- Option C claims some patients purge without binge eating. That describes purging disorder, which is a separate diagnosis in OSFED (Other Specified Feeding or Eating Disorder), not bulimia nervosa; thus C is incorrect for bulimia.
- Option D claims gender-diverse individuals tend to be less affected. Evidence shows gender-diverse and transgender individuals often have equal or higher prevalence of eating disorders; therefore D is false.

3) Intermediate “calculations”/checks
- Map each option to DSM-5 and epidemiologic facts: A → DSM-5 criterion (true); B → inconsistent with typical weight distribution (false); C → describes different disorder (false); D → contradicted by prevalence data (false).

4) Why the correct answer is correct
- The undue influence of shape/weight on self-evaluation is explicitly stated in diagnostic criteria and is central to the psychopathology of bulimia, motivating binge–compensatory cycles.

5) Why other options are incorrect (brief)
- B: Low weight is typical of anorexia, not bulimia. C: Purging without bingeing is purging disorder/OSFED, not bulimia. D: Gender-diverse individuals are not less affected; many studies report similar or higher risk.

6) Conclusion
The correct answer is "Self-evaluation is unduly influenced by shape and/or weight," which matches the provided answer.

It is true about Bulimia Nervosa that:单项选择题

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