Design features of healthcare spaces can be said to impact the health and well-being of patients either directly or indirectly. A direct influence of a design feature means that the impact is not mediated in any way and therefore has a direct effect on patients (e.g., germs sitting in a carpet surface). An indirect influence is one in which the environmental stimuli act through a psychological process of sensory perceptions (e.g., carpet may be perceived as a home environment and may decrease the patient’s stress). This paper is focused on finding research data that had an indirect influence.