The Study of Facial Expressions

What Is the Study of Facial Expressions?

Facial expressions are among the most immediate ways humans communicate emotion. Before we speak a word, our faces often reveal how we feel. The formal study of these expressions has shaped how psychologists, researchers and security professionals understand nonverbal communication.

Much of what we know today stems from decades of research into which facial movements correspond to specific emotions, and whether these patterns hold true across different cultures.

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Paul Ekman and the Foundations of Modern Research

Paul Ekman is frequently cited as an influential figure in facial expression research. He completed his PhD in clinical psychology at Adelphi University in 1958 and spent most of his career at the Langley Porter Neuropsychiatric Institute in San Francisco, where he had trained earlier as an intern.

His significant contributions to the field began in the 1960s. Over the following decades, Ekman travelled extensively, studying people from various cultures to test whether certain expressions were universal or learned. His findings suggested that some basic emotional expressions appear consistently across populations, though the degree of universality and how expressions are interpreted across cultures remains a subject of ongoing academic debate.

His work has informed fields ranging from clinical practice to interview techniques and security training.

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Microexpressions and Universal Expressions

One of Ekman's notable contributions was his research into microexpressions. These are very brief, involuntary facial movements that occur when someone experiences an emotion but attempts to hide or suppress it. They typically last only a fraction of a second and are difficult to control consciously, which makes them potentially useful for detecting concealed feelings.

Some studies have noted similar patterns in chimpanzees, which might indicate an evolutionary aspect to these rapid facial signals. Detecting microexpressions requires careful observation and often specific training, as they pass quickly and can be easy to miss in everyday conversation.

Through his cross-cultural studies, Ekman identified seven primary facial expressions that appear to be widely recognised. Each involves distinct muscle movements, though individual variation and cultural context influence how they appear in practice:

• Happiness: the corners of the mouth lift, cheeks rise, and the eyes narrow slightly, often creating small lines at the outer corners.
• Sadness: the eyes may appear narrowed, eyebrows draw together and upward, the mouth turns down, and the chin can push upward.
• Fear: the mouth and eyes tend to open wider than usual, eyebrows raise, and the nostrils may flare, though intensity varies considerably between individuals.
• Anger: eyebrows lower and draw together, the forehead may wrinkle, and the eyelids and lips tense.
• Disgust: the nose wrinkles, the upper lip raises, and the eyebrows typically lower.
• Surprise: eyebrows lift, eyes widen, and the jaw may drop open.
• Contempt: this expression is often asymmetrical, with one corner of the mouth rising slightly.

These categories provide a useful framework, though real expressions can be more subtle or blended.

Practical Applications

Understanding facial expressions has practical uses beyond academic research. Healthcare professionals may find it helpful when assessing patients who struggle to verbalise their feelings. Teachers and social workers can use this awareness when working with children or vulnerable adults.

In the UK, some reports suggest that certain police and customs training programmes have considered this research to help staff assess behaviour during interviews or border checks. However, reading faces is not a foolproof method for detecting deception, and over-reliance on any single cue can lead to mistakes.

For most people, a general awareness of facial expressions simply improves everyday communication. Noticing when someone's words do not match their expression can prompt a more thoughtful response, whether at work, at home, or in social settings.

The Next Step

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