Imposter syndrome is when you feel undeserving of your accomplishments or position in the workplace. It often stems from self-doubt and feelings of inadequacy. Despite your past successes and qualifications, you may believe you’re not actually smart enough to work in your current position. You may even feel that you’ve somehow fooled people into believing you’re competent, so fear being exposed as a fraud by your coworkers or managers. Although it’s not recognized as a psychiatric disorder, imposter syndrome can involve negative self-talk that contributes to stress at work.