Anxiety can boost the detection of potential threats in many ways. There is evidence that one and the same facial expression can be perceived differently depending on whether it is seen in a neutral or in a threatening situation. The present study investigated how aversive anticipation influence the accuracy of facial emotion recognition and the perceived emotional intensity of the faces which varied at varyingin their emotional expressive levelseEmotional expressive iIntensity. Forty-three participants categorized and rated the intensity of morphed faces (20, 40, 60, and 80 %) of fear, anger, and happy expressions. Differently colored picture frames indicated either threat of electric shock or safety. Threat-of-shock enhanced the categorization accuracy specifically for fearful faces. During threat, 80% fearful and happy faces, and all levels of angry faces (20-80%) were rated as more intense. In addition, we found that more trait anxious individuals more frequently erroneously categorized neutral faces as fearful. Thus, state anxiety enhances accurate fear categorization, and boosts the perceived intensity of emotional faces; whereas trait anxiety leads to a biased threat perception in non-threatening faces.