Which symptoms are shared by both anorexia nervosa and bulimia nervosa?

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Altered perception of body shapeOverwhelming fear of gaining weightSelf-identity heavily influenced by body size and weightEating behaviors driven more by psychological factors than by hungerAll the listed symptoms

Explanation

Both anorexia nervosa and bulimia nervosa exhibit several common features: a distorted perception of body image, a strong fear of becoming overweight, a self-concept closely tied to body weight and shape, and eating patterns controlled primarily by psychological rather than physiological cues. Therefore, all the above symptoms apply to both disorders.