This paper will discuss the psychology of perception, threshold, and emotion in interior glass design. Color theory and referenced material behind threshold will be presented, and the implication of threshold in the design and specification of glass in various architectural applications will be examined. Humans have the ability to discern color and contrast but there is a range of differences in colors and contrast that are not perceivable to the human brain. The signal strength between the differences has to be great enough for the mind to be able to conclude there is a difference. This phenomenon is known as threshold.
The emotional content of shapes and colors will also be investigated. What shapes and colors are most pleasing and how aesthetics impact the psychological state of occupants will be presented.