In the ASHRAE annual meeting 2023, Dr. Liu and Chao gave two presentations regarding the effects of CO2 on cognition. The details on the two presentations are as follows:
Summary: Face masks have been a common strategy proven to protect against Covid-19. There is very little research on whether wearing a mask while exposed to such a high CO2 level can significantly reduce cognitive performance. We assessed the effects of elevated CO2 by a surgical mask on cognitive performance in a warm environment representing a warm climate that can exacerbate the effects, if any. Cognition and thermal comfort were assessed using standard computerized cognitive tasks and questionnaires, respectively. In general, statistical analysis found small or negligible differences between the control and experiment groups on cognition.
Summary: The study aimed to explore the impact of CO2 and body odor on driving performance. Using physiological sensors like EEG, fNIRS, ECG, and EDA, they measured brain activity, heart rate, and skin conductance during driving. While driving data showed no significant effect, EEG and fNIRS revealed notable impacts on cognitive tasks and perception. Physiological signals serve as valuable indicators of cognitive performance while driving. Understanding environmental factors is crucial for enhancing road safety. The study emphasizes considering both physiological and environmental factors in assessing driving performance.
“Participating in the event expanded my knowledge and inspired me to further explore innovative strategies.” Chao Wang
In addition, Chao presented his conference paper titled “Interactive Effects of Interior Ambient Light and Thermal Environment on Comfort, Emotion, and Driving Performance.”
Summary: The hue-heat hypothesis suggests that color temperature can alter thermal perception, which could affect the driving experience and perception of interior space. This preliminary study investigates the interactive influence of interior ambient light and thermal environment on drivers’ thermal comfort and performance in vehicles. Thirty participants with valid licenses and no simulator sickness history were exposed to neutral (23°C) or slightly warm (28°C) temperatures and randomly assigned red, blue, warm white (2700 K), or cool white (5000 K) light. They completed a 9-minute driving task under each light condition, and their performance was recorded using a high-fidelity simulator. After each task, participants assessed their environmental satisfaction through a survey. The study found that temperature had significant effect on drivers’ vote to the light brightness and thermal sensation. However, the preliminary study found no significant impact of temperature or light on driving performance.
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