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A person’s mental capacities, such as intellect, cannot be observed directly and so are instead inferred from indirect cues. We predicted that a person’s intellect would be conveyed most strongly through a cue closely tied to actual thinking: his or her voice. Hypothetical employers (Experiments 1–3b) and professional recruiters (Experiment 4) watched, listened to, or read job candidates’ pitches about why they should be hired. These evaluators rated a candidate as more competent, thoughtful, and intelligent when they heard a pitch rather than read it and, as a result, had a more favorable impression of the candidate and were more interested in hiring the candidate. Adding voice to written pitches, by having trained actors (Experiment 3a) or untrained adults (Experiment 3b) read them, produced the same results. Adding visual cues to audio pitches did not alter evaluations of the candidates. For conveying one’s intellect, it is important that one’s voice, quite literally, be heard.
