This paper discusses the importance of including time in environmental design and the challenges facing environmental design now and in the future. Research shows that important factors for studying the effects of environments are time, body movement, control and sensory variability. There are many ways to incorporate time into the design and it is dependent on the type of environmental design. Research also suggests that discomfort in restrictive environments, e.g., in an airplane or automobile are strongly related long periods of inactivity and lack of sensory stimulation. Research also suggests that office workers' health risks are in a large part due to restrictive movement, training inefficiencies, and lack of variation found in the environment. A challenge is how to incorporate stimulating activities and variation into restrictive environments. Another challenge is the cost versus benefit of designing comfortable and healthy environments. Will comfort standards be accomplished through volunteer compliance or is it necessary to push for compliance through legal requirements, standards and regulations? Is it time to consider reducing discomfort as a necessity and apply what research has suggested, i.e., that variation and movement over time in interior environments promotes well-being and productivity? Is it time to accept the results of research and apply the findings to the designs and practice of environmental design?@en

Studies on color preferences are dependent on the topic and the relationships with personal characteristics, particularly personality, but these are seldom studied in one population. Therefore a questionnaire was collected from 1095 Dutch people asking for color preferences about different topics and relating them to personal characteristics.
Color preferences regarding different topics show different patterns and significant differences were found between gender, age, education and personality such as being technical, being emotional or being a team player. Also different colors were mentioned when asked for colors that stimulate to be quiet, energetic, able to focus or creative. Probably, due to unconsciousness of contexts, many people had no color preference, a result that in the literature seldom is mentioned.
Blue was the overall favourite color, however most males chose for blue (25 %) while most females had no color preference (18 %). Black was the overall favourite color for clothing, mainly chosen by females (40%), while males primarily chose blue (27%). For building interiors subjects preferred white.
For moods, subjects preferred white for being quiet or being able to focus, red for being energetic and had no color preference for being creative.
It is concluded that color preferences are dependent upon the topic, and personal characteristics. The findings are important for architects, interior designers, fashion designers and product designers to have a basic idea of preferred colors for different objects by different types of people.@en