Abstract
Some potential effects of the proposed extension of a major highway near a university campus were evaluated, with the expected increased levels of ambient traffic sound as the major independent variable. On self-reports, observation of classroom behavior, and in data collected during a 5-day dormitory field experiment, increased ambient sound had adverse effects on social interaction in group problem-solving and in the classroom, and on subjective reactions. No reliable changes were found on individual cognitive performance on brief tests, nor in pulse rate. The study demonstrates the need for careful, long-duration, multi-variable psychological research as a part of environmental impact predictions of major construction projects.
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