Body Cues, Not Facial Expressions, Discriminate Between Intense Positive and Negative Emotions

TLDR

Emotion models distinguish positive from negative states, yet neurobiological evidence suggests shared mechanisms across them. The study examined whether real‑life facial expressions also show overlapping positive and negative affect. The authors constructed mixed stimuli pairing intense negative faces with positive bodies and vice versa to probe underlying mechanisms. During peak intensities, bodies alone discriminated positive from negative emotions but faces did not; however, when faces were paired with bodies, viewers perceived the faces’ affect consistent with the body context, shifting perceived affect and mimicry, thereby challenging standard emotion expression models and underscoring the body’s role.

Abstract

The distinction between positive and negative emotions is fundamental in emotion models. Intriguingly, neurobiological work suggests shared mechanisms across positive and negative emotions. We tested whether similar overlap occurs in real-life facial expressions. During peak intensities of emotion, positive and negative situations were successfully discriminated from isolated bodies but not faces. Nevertheless, viewers perceived illusory positivity or negativity in the nondiagnostic faces when seen with bodies. To reveal the underlying mechanisms, we created compounds of intense negative faces combined with positive bodies, and vice versa. Perceived affect and mimicry of the faces shifted systematically as a function of their contextual body emotion. These findings challenge standard models of emotion expression and highlight the role of the body in expressing and perceiving emotions.