Journal article
Implementation of multivariate linear mixed-effects models in the analysis of indoor climate performance experiments
NIRAS A/S1
DTU Data Analysis, Department of Informatics and Mathematical Modeling, Technical University of Denmark2
Department of Informatics and Mathematical Modeling, Technical University of Denmark3
Section for Indoor Environment, Department of Civil Engineering, Technical University of Denmark4
Department of Civil Engineering, Technical University of Denmark5
The aim of the current study was to apply multivariate mixed-effects modeling to analyze experimental data on the relation between air quality and the performance of office work. The method estimates in one step the effect of the exposure on a multi-dimensional response variable, and yields important information on the correlation between the different dimensions of the response variable, which in this study was composed of both subjective perceptions and a two-dimensional performance task outcome.
Such correlation is typically not included in the output from univariate analysis methods. Data originated from three different series of experiments investigating the effects of air quality on performance. The example analyses resulted in a significant and positive correlation between two performance tasks, indicating that the two tasks to some extent measured the same dimension of mental performance.
The analysis seems superior to conventional univariate statistics and the information provided may be important for the design of performance experiments in general and for the conclusions that can be based on such studies.
Language: | English |
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Publisher: | Springer-Verlag |
Year: | 2011 |
Pages: | 129-136 |
ISSN: | 14321254 and 00207128 |
Types: | Journal article |
DOI: | 10.1007/s00484-011-0404-y |
ORCIDs: | Toftum, Jørn |
Experimental design Indoor air quality Multivariate mixed-effects modeling Performance Statistical analysis
Air Pollution, Indoor Animal Physiology Biophysics and Biological Physics Environment Environment, Controlled Environment, general Environmental Health Female Floors and Floorcoverings Humans Linear Models Meteorology/Climatology Multivariate Analysis Plant Physiology Task Performance and Analysis Ventilation Workplace