Combined temperature and lighting effects on the performance of repetitive tasks with differing visual content. Paper presented at the CIE Congress in London, September 1975.

A climate chamber experiment on the combined effects of temperature and illuminance on the performance of 144 ten- year old children. Three illuminances (60, 250 and 1 000 lux) were combined with two levels of heat stress, one equivalent to normal room temperature (c 22°C) and one to a moderate level of heat stress (c 27°C). The results of performance tests with Landolt rings of different sizes and of an addition test are reported.