signaling

Signaling, in the context of human behavior, refers to the transfer of information without using spoken words. This can include facial expressions, gestures, body posture, and even modifications to speech like tone or rate. While some nonverbal signals, such as facial expressions for emotions, are universal, others, like gestures, can vary significantly across cultures.1

In animal behavior, communication involves a sender producing a signal that a receiver uses to make decisions. These signals can be sounds, colors, postures, or even chemical releases. Signals evolve from existing body structures or behaviors, often becoming more distinct and informative through a process called ritualization. For instance, a gazelle's alert posture, with its head held high, signals danger to others, who then prepare to flee. This communication is crucial for survival, reproduction, and social interactions within species.2345