I’m excited to share our latest paper published in Building and Environment, where we explore how room temperature and light color affect reading comprehension—and take a fresh look at the Hue-Heat Hypothesis.
The study answers two questions:
- Why are past findings on the Hue-Heat Hypothesis inconsistent?
Our decision tree model revealed that thermal perception (how warm/cool people feel) plays a key role.
- Do air temperature and light color temperature affect reading comprehension?
It depends on how difficult the reading tasks are! While we didn’t find significant differences in reading scores, students showed slightly higher alertness at 24°C, 3000K. However, we should be cautious in interpreting these results—there may not be a one-size-fits-all ‘optimal’ temperature or lighting condition. More research is needed.
More information:
The Hue-Heat Hypothesis suggests that red and yellow lighting can create a perception of warmth, while blue lighting produces a cooler sensation. This implies a potential to enhance thermal comfort and reduce energy use simply by adjusting light color.
In our study, we tested the validity of the Hue-Heat Hypothesis and examined how light color, combined with room temperature, influences students’ reading comprehension. Our results confirmed the Hue-Heat Hypothesis —light color does affect thermal perception. However, we found no significant differences in reading performance across different combinations of temperature (24°C vs. 28°C) and light color (3000K vs. 6000K). This may be due to a ceiling effect, as the reading tasks and quizzes were relatively easy, allowing students to perform well regardless of environmental conditions. These findings suggest that students can still complete light cognitive tasks effectively, even in slightly warmer environments.
We also trained a decision tree model to predict support for the Hue-Heat Hypothesis. The model shows that PMV (Predicted Mean Vote) is an important factor in determining whether the hypothesis holds.
Full paper (Free access):
https://www.sciencedirect.com/science/article/pii/S0360132325002331
#Research #CognitiveScience #LightingDesign #ThermalComfort #Sustainability #ReadingComprehension #HueHeatHypothesis #IndoorEnvironment #EnergyEfficiency #BuiltEnvironment