By the strength of his voice

Humans read clues of physical strength from others’ voices. In a study, participants were asked to rate the person behind the voice in terms of physical strength, height and weight.

Across the board, when men’s utterances were assessed, “average individual estimates of strength from the voice were accurate and highly significant,” Sell reports. “This accuracy is similar to the accuracy of strength assessment from static visual images of the face, but lower than estimation from images of the body.”

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