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Investigating the quality of the correlation between indoor environmental factors and human perception.

Number: 3438

Author(s) : PITTANA I., MORANDI F., CAPPELLETTI F., GASPARELLA A.

Summary

In building design, commissioning and operation, the prediction of people comfort level is fundamental. However, the overall effect of the indoor environment on human perception and performance depends on the combination of many environmental factors, such as acoustic, thermal, visual, and air quality stimuli. Among all different building types, in the educational ones the indoor factors can critically affect students’ concentration and ability to learn, so that schools are especially worth investigating. In this framework this paper aims to investigate the correlation between the measured environmental characteristics and the subjective response obtained by means of a questionnaire, designed for the purpose of capturing students’ sensation, preference, and comfort in all the four environmental domains that contribute to people indoor wellbeing in educational buildings. Fifty-five panels, i.e., groups of students interviewed in the same moment and in the same classroom, have been considered, collecting 949 questionnaires. To increase the representativeness of the responses, panels have been grouped according to similar environmental conditions and subjective responses. In each group the mean sensation and comfort votes have been compared with the mean value of each environmental parameter, namely air temperature, CO2 concentration, illuminance level, and sound pressure level characterizing the corresponding domain. For each regression the coefficients of determination and p-values have been calculated. In order to evaluate the confidence on these parameters, and consequently to characterize the quality of the correlations, a permutation test has been applied. Some quality correlations are found between indoor environmental factors and human perception either on the same or on different environmental domains. In particular, results show that all sensation votes are correlated with the corresponding environmental parameters with a high confidence level. Concerning the cross-domain effects, air temperature and illuminance are the parameters correlated with the highest confidence to any of the other domains’ sensations, while CO2 concentration is correlated with high confidence only to thermal sensation.

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  • Original title: Investigating the quality of the correlation between indoor environmental factors and human perception.
  • Record ID : 30030233
  • Languages: English
  • Source: 2022 Purdue Conferences. 7th International High Performance Buildings Conference at Purdue.
  • Publication date: 2022

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