This is not what Felsten claims!!!! Check it out yourself just in the abstract of the article! (below) The study asked students essentially about what they were attracted to. To jump to the conclusion from this study that their "attention" was "restored" by the nature they "liked" perceiving is silly!
["In the present study, college students, instructed to imagine themselves cognitively fatigued, rated the perceived restorativeness of indoor campus settings that varied by view of nature: some had no views of nature, some had window views of nature with built structures present, and some had views of simulated nature depicted as large nature murals. Students rated settings with views of dramatic nature murals, especially those with water, more restorative than settings with window views of real, but mundane nature with built structures present. Students rated settings that lacked views of real or simulated nature least restorative. The findings suggest that large nature murals in indoor settings used for study breaks may provide attentionally fatigued students with opportunities for restoration when views of nature are unavailable or limited in restorative potential."]
(http://www.sciencedirect.com/science/article/pii/S0272494408000996)