NoticelyFear vs surprise, anger vs disgust: telling similar expressions apart
Fear and surprise both raise the brows and widen the eyes. In fear the brows are straighter and pulled together, the upper lids rise further and the lips stretch sideways; in surprise the brows curve and the jaw drops loosely. Anger and disgust both lower the brows: disgust wrinkles the nose and raises the upper lip, anger tenses the lids and presses the lips.
§ 1Why some expressions get confused
Expressions that share movements are easy to mix up, especially when you see them briefly. Jack, Garrod and Schyns (2014) found that dynamic expressions send broad signals first and specific ones later. Early in an expression, fear and surprise are confused because both open the eyes wide, and disgust and anger are confused because both pull the brows down. The cues that separate them arrive a moment later, and they are small.
§ 2Fear vs surprise
| Cue | Fear | Surprise |
|---|---|---|
| Brows | Raised but straighter and pulled together (AU1 + AU2 + AU4) | Raised high in a smooth curve (AU1 + AU2), not pulled together |
| Upper lids | Raised strongly; white shows above the iris (AU5) | Raised only a little (slight AU5) |
| Mouth | Lips stretched sideways (AU20) | Jaw dropped loosely, mouth a relaxed oval (AU26) |
Start with the eyes: Wegrzyn and colleagues (2017) found that the raised upper lid was the most important cue for fear. Fear can show in the eyes alone, so if you look only at the mouth you will often miss it. The pulled-together brows (AU4) are the other key difference, because surprise does not have them.
§ 3Anger vs disgust
| Cue | Anger | Disgust |
|---|---|---|
| Brows | Lowered and pulled together (AU4) | Pulled down a little as a side effect of the nose wrinkle |
| Eyes | Hard stare, tense lower lids (AU5, AU7) | No hard stare |
| Nose and lips | Lips pressed or narrowed (AU23/24) | Nose wrinkled (AU9), upper lip raised (AU10) |
Imagine covering the brows and look at the middle of the face: a wrinkled nose or a lifted upper lip points to disgust; hard, tense eyes with pressed lips point to anger.
§ 4Other common mix-ups
- Sadness vs fear. Both can raise the inner brows. Sadness pulls the lip corners down and may push the chin up; fear widens the eyes and stretches the lips.
- Contempt vs a small smile. A smile uses both lip corners. Contempt tightens and raises one corner only, and the eyes stay neutral.
- Contempt vs disgust. Disgust involves the nose and the upper lip in the centre of the face; contempt involves one lip corner.
- Anger vs the narrowed eyes of a smile. In a smile the cheeks lift and lines appear at the eye corners; in anger the lids tighten without the cheeks rising.
- Weak anger vs a neutral face. A slight lowering of the brows is easy to miss, and a resting face is easy to over-read. When unsure, compare with the same person’s neutral face.
§ 5How to practise telling them apart
- Look at the eyes and brows first, then at the mouth.
- Name the movement before the emotion: “brows pulled together, lips stretched”.
- Compare the two expressions of a pair side by side, on the same face if possible.
- Check the answer after each try and look again at the cue you missed.
- Once each pair feels easy, mix all the expressions at random.
Description, practice and feedback together are the core of training studies; Hurley (2012) found that this combination worked best for learning to recognise brief expressions.
Questions and answers
Why do I confuse fear and surprise?
Because both raise the brows and widen the eyes, and early in the expression they look almost the same. Check whether the brows are pulled together and whether the lips stretch sideways: both point to fear.
Is disgust the same as contempt?
No. Disgust wrinkles the nose and raises the upper lip in the centre of the face; contempt tightens one lip corner.
Which part of the face should I look at?
The eyes and brows for fear, anger and sadness; the mouth and nose for happiness and disgust. Surprise needs both.
Does context matter?
Yes. The same face can be read as fear or as excitement depending on the situation, so take the context into account and treat your reading as a guess.