Effect of Carbon Monoxide on Time Perception

Exposure to carbon monoxide at concentrations of < 2, 50, 100, 200, and, 500 ppm for periods up to five hours produced no impairment in the ability of the subjects to perform the Beard-Wertheim time discrimination test, to estimate 10- or 30-second intervals, or to performs the Marquette time estimation test.

Abstract

Twenty-seven healthy, adult, male and female volunteers were exposed to carbon monoxide at concentrations of < 2, 50, 100, 200, and, 500 ppm for periods up to five hours for the purpose of determining the effect of this gas on time perception. These exposures, which resulted in a range of carboxyhemoglobin saturations up to 20%, produced no impairment in the ability of the subjects to perform the Beard-Wertheim time discrimination test, to estimate 10- or 30-second intervals, or to perform the Marquette time estimation test.