People who systematically underestimate themselves and their own performance suffer from so-called impostor phenomenon. They think that any success is due to external circumstances or just luck and chance. Those people live in constant fear that their “deception” will be exposed. In a new study in Personality and Individual Differences psychologists from Martin Luther University Halle-Wittenberg (MLU) show for the first time that even under real-life conditions the phenomenon appears regardless of age, gender, and intelligence. Up until now it had only been investigated on the basis of surveys or individual cases.