The Influence of Face Masks on Micro-Expression Recognition

This study aimed to explore the influence of various mask attributes on the recognition of micro-expressions (happy, neutral, and fear) and facial favorability under different background emotional conditions (happy, neutral, and fear). The participants were asked to complete an ME (micro-expression) recognition task, and the corresponding accuracy (ACC), reaction time (RT), and facial favorability were analyzed. Results: (1) Background emotions significantly impacted the RT and ACC in micro-expression recognition, with fear backgrounds hindering performance. (2) Mask wearing, particularly opaque ones, prolonged the RT but had little effect on the ACC. Transparent masks and non-patterned masks increased facial favorability. (3) There was a significant interaction between background emotions and mask attributes; negative backgrounds amplified the negative effects of masks on recognition speed and favorability, while positive backgrounds mitigated these effects. This study provides insights into how masks influence micro-expression recognition, crucial for future research in this area.