The present study aimed to investigate the accuracy, bias, and severity of gender-related facial emotion recognition among normal adolescent girls. The research design was an analytical cross-sectional study. The statistical population of the present study was adolescent girls from the high schools of Lahijan city in the academic year 1402-1403, and the sample size was 243 people who were selected from public school students using the available sampling method and based on the inclusion and exclusion criteria. The research tool was the emotion recognition/perception test designed using the NimStim Set of Facial Expressions (2009). The data were analyzed using the student's t-test, Pearson's chi-square, and chi-square goodness of fit tests. The results showed that adolescent girls had greater accuracy in recognizing women's facial emotions and showed more errors when recognizing men's emotions. In addition, happiness and disgust were recognized more accurately (with less errors) in men, same as sadness, fear, and anger in women. Adolescent girls also showed bias when recognizing facial emotions in men and women. This bias was associated with a greater selection of disgust in men's faces and a more selection of surprise and fear in women's faces. Finally, adolescent girls perceived facial emotions in women more intensely than in men. In addition, adolescent girls perceived happiness, sadness, and disgust in men more intensely, and fear and anger in women more intensely. Therefore, the gender of the emotion expressers affects the perception and recognition of facial emotions in adolescent girls.
