Some defense mechanisms are considered primitive and others mature. In the latter group is sublimation, when a person turns a potentially harmful impulse into something less harmful (a man with aggressive impulses takes up boxing) or even constructive (a person with the urge to cut people becomes a surgeon who saves lives). Displacement (shifting a feeling toward one person onto a safer alternative) is considered a neurotic defense, neither primitive nor mature. A person who was yelled at by her boss but could get fired if she yelled back might come home and yell at her dog. Or a woman who
  
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