Researchers used the Perceived Restoration Scale, PRS to examine how, and to what degree, mixed landscapes that include both natural and build elements contribute to mental restoration. Between the two gardens, the larger, more wild garden was seen as more restorative. However, authors admit that this result could have been influenced by how the survey questions were framed. Researchers also found that mental restoration is influenced by personal preferences. The authors compare their results with other setting-specific restoration tests to demonstrate that mixed landscapes are more restorative than strictly urban settings. Researchers conclude that more setting-specific restoration testing is needed as a means to accurately advise future designs for healing landscapes.
Ivarsson, C.T., and Hagerhall, C.M. (2008). The Perceived Restorativeness Of Gardens – Assessing The Restorativeness Of A Mixed Built And Natural Scene Type. Urban Forestry & Urban Greening, 7, 107-118.