The Sound of Intellect: Speech Reveals a Thoughtful Mind, Increasing a Job Candidate's Appeal.
Level 2 - randomized trial
Multiple randomized experimental trials comparing evaluation modalities (text, audio, audiovisual).
PubMed 25926479 · doi:10.1177/0956797615572906
What was done
Across multiple experiments, hypothetical employers (Experiments 1–3b) and professional recruiters (Experiment 4) were assigned to evaluate job candidates' pitches presented via text, audio, or video. Sub-experiments also evaluated written pitches read aloud by trained actors (Experiment 3a) or untrained adults (Experiment 3b).
What was found
The abstract reports no numerical values. Evaluators rated candidates as more competent, thoughtful, and intelligent—and showed higher interest in hiring them—when hearing pitches compared to reading them. Adding voice to written text replicated these findings, while adding video to audio provided no additional change in candidate evaluations.
Why it matters
This study shows that spoken voice directly conveys perceived intellect and mental capacity better than text alone, shaping hiring evaluations and interpersonal impressions.
Limits
The abstract omits sample sizes, participant demographics, and numerical effect sizes. Most evaluations used simulated employer scenarios rather than actual employment outcomes.
Cited by
- supports Job evaluators and recruiters rate job candidates as significantly more intelligent, rational, and hirable when hearing their pitch rather than reading their written pitch.