Evaluating the impact of viewing location on view perception using a virtual environment

Fedaa Abd-Alhamid,Michael Kent,John Calautit,Yupeng Wu

doi:10.1016/j.buildenv.2020.106932

Abstract

Window views are an important design feature in buildings. Views can impact the cognitive attention, psychological and physiological well-being of building occupants due to their ability to provide recovery in stressful working environments. The impact of viewing position on view perception as a result of the visual parallax effect resulted from occupants seeing a window from different relative positions in any given room has not been comprehensively investigated. In this study, view perception was evaluated using a physically-based 360° virtual environment at three different viewing locations: close, middle, and far. The three conditions were presented to thirty-two participants. The study employed a comprehensive method by collecting subjective and physiological evaluations. A stress-recovery methodology to assess restorativeness effects was used by presenting a window view observing period after a stressful task was performed. Subjective assessments included questions on view restorative ability, view content and size preferences, view valance/arousal, and positive and negative affects. Physiological measures included skin conductance, heart rate, and heart rate variability. Results showed significant differences in subjective parameters and measures of skin conductance. Decreased view quality was reported as participants observed the view from the further viewing locations compared to the close position. The study highlights the importance of the informative content seen in the window view such as the sky and ground, which may impose limitations on recommended room depth and windows design. The results of this study show that the design of window views has important implications on the health and well-being of building occupants.

Highlights

IntroductionThe need for natural light, fresh air, and connection to the outdoor environment (i.e., time of day and weather conditions) are just some of the reasons why windows are an important feature in the design of any building [1,2]
The need for natural light, fresh air, and connection to the outdoor environment are just some of the reasons why windows are an important feature in the design of any building [1,2]
The y-axis shows the rating of view from 0 (Not at all) to 10 (Very much) by par ticipants for different perception parameters displayed on x-axis when presented at different observing locations: C, M, and F

Summary

Introduction

The need for natural light, fresh air, and connection to the outdoor environment (i.e., time of day and weather conditions) are just some of the reasons why windows are an important feature in the design of any building [1,2]. Views could be considered as the perceived visual messages perceived by the human perceptual system that are transmitted into the building using daylight [3,4] (i.e., daylight reflected from outside surfaces carries visual infor mation and enters into the building through windows, which is perceived by building occupants as the view) Through this process, daylight could be referred as a carrier of outdoor view. View preference can have a profound influence on cognitive atten tion and performance [5,6,7] and on the psychological and physiological well-being [3,6,7,8,9] of building occupants Despite their known impor tance on occupant satisfaction in buildings, the visual connection pro vided by windows with the outdoor environment is not well understood [10]. Other studies have evaluated the preferred size of the window that provides the view [11,16,17,18,19,20,21]); studies have often shown inconsistent conclusions; for example, people reported different preferred window sizes in different studies (e.g., 35% [16], 25–30% [18], 50 and 80% [17], 40% [20], 100% [21])

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