A new study challenges the longstanding belief that fear is primarily communicated through facial expressions, showing instead that context plays the dominant role in real-life fear recognition. By analyzing real-life fear reactions in videos, researchers found that facial expressions alone fail to reliably signal fear, whereas situational context—such as the environment and body posture—allows for clear and accurate fear perception. These findings have major implications for psychology, neuroscience, and artificial intelligence, suggesting that current emotion recognition models, including AI-based systems, need to incorporate contextual information rather than relying solely on facial cues.
Recognizing fear in others is crucial for survival, but how do we achieve this? A new study, published in PNAS, led by Professor Hillel Aviezer and PhD student Maya Lecker from the department of Psychology at Hebrew University challenges the widely accepted notion that fear is primarily communicated through facial expressions. Instead, the research finds that context, rather than facial reactions, plays a critical role in fear recognition.
For decades, emotion research has centered on the idea that facial expressions provide a clear, universal signal of fear. However, these studies often rely on posed expressions rather than genuine fear responses. Overcoming significant practical challenges, Professor Aviezer and his team conducted an innovative study analyzing real-life reactions captured in videos during intense fear-inducing situations such as height jumps, physical attacks, and exposure to phobia triggers.
The study, which involved 12 preregistered experiments with a total of 4,180 participants, examined how people perceive fear in real-life scenarios. Participants were shown different versions of video clips: faces alone, context without faces, and full videos combining both elements. The researchers used various methods to assess fear perception, including forced-choice labeling, open-ended responses, and valence-arousal ratings.
The results revealed a striking contrast between commonly held assumptions and real-world observations:
• Facial expressions alone failed to communicate fear reliably.
• Context without faces, as well as full videos with context, led to clear and robust recognition of fear.
These findings have implications for multiple fields, including psychology, neuroscience, and artificial intelligence. Many current models of emotion recognition—including AI-based emotion detection systems—rely heavily on facial cues. However, this study suggests that these systems may need to incorporate broader contextual understanding to accurately interpret emotions.
“Our research shows that despite the widely held belief that fear is expressed through a distinctive facial expression, real-life fear reactions tell a different story,” said Professor Aviezer. “Facial expressions alone carry minimal diagnostic value for fear recognition, while situational context plays a crucial role.”
This study paves the way for a more nuanced understanding of how humans perceive emotions, urging researchers, clinicians, and technology developers to reconsider existing models of emotion recognition.
The research paper titled “Real-life intense fear is communicated through context, not facial expressions” is now available in PNAS and can be accessed at https://www.pnas.org/doi/10.1073/pnas.2414677122
DOI 10.1073/pnas.241467712
Funding
This work was supported by the Israel Science Foundation
Researchers:
Maya Lecker1, Scott Hallock2, Axel Danielson3, Maximilien Van Aertrickc3, Merel Kindt4, Hillel Aviezer1
Institutions:
1. Department of Psychology, Hebrew University of Jerusalem
2. WMTI Productions, Inc., Encino, CA
3. Plattform Produktion, Gothenburg
4. Department of Clinical Psychology, University of Amsterdam
For a century, the Hebrew University of Jerusalem has been a beacon for visionary minds who challenge norms and shape the future. Founded by luminaries like Albert Einstein, who entrusted his intellectual legacy to the university, it is dedicated to advancing knowledge, fostering leadership, and promoting diversity. Home to over 23,000 students from 90 countries, the Hebrew University drives much of Israel’s civilian scientific research, with over 11,000 patents and groundbreaking contributions recognized by nine Nobel Prizes, two Turing Awards, and a Fields Medal. Ranked 81st globally by the Shanghai Ranking (2024), it celebrates a century of excellence in research, education, and innovation. To learn more about the university’s academic programs, research, and achievements, visit the official website at http://new.huji.ac.il/en.