Abstract
The effect of lighting level and room decor on interpersonal communication was investigated. Arousal and comfort models were invoked to generate hypotheses that (a) brighter lighting would stimulate more general communication, (b) lower lighting levels would encourage more intimate communication, (c) over time, lower light levels would dampen both general and intimate communication, and (d) home-like decor would encourage more general and more intimate communication. In a 2 × 2 between-subjects design, pairs of female friends wrote two letters to one another in bright vs. soft lighting and office-like vs. home-like decor. All the hypotheses were confirmed, except that brighter light encouraged more rather than less intimate communication.
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