“…Empirical support for this theory has been discerned in the results of true and quasi-experiments in laboratory and field settings, some of which have concerned single, brief occasions spent in natural versus urban environments (e.g., Berman, Jonides, & Kaplan, 2008;Hartig, Evans, et al, 2003;Hartig, Mang, & Evans, 1991) or different kinds of natural environments (e.g., Gatersleben & Andrews, 2013;Ratcliffe, Gatersleben, & Sowden, 2013) and others of which assumed repeated contacts with nature in a residential or therapeutic context (e.g., Kuo & Sullivan, 2001;Cimprich, 1993; for a selective review, see Kaplan & Berman, 2010). In their meta-analysis, however, Bowler et al (2010) could not reliably affirm attentional benefits of nature experiences on the basis of the results available at that stage in the development of the literature.…”