“…Attention Restoration Theory (ART) proposes that exposure to particular environments, especially nature, helps to restore attention after depletion because natural environments gently capture externally-focused (exogenous) attention processes, thereby allowing internally-focused (endogenous) attention to rest and be replenished ( Kaplan and Kaplan, 1989 ; Kaplan, 1995 ; Williams et al, 2018 ). Sustained attention has often ( Hartig et al, 1991 ; Berto, 2005 ; Craig et al, 2015 ; Lee et al, 2015 ; Schutte et al, 2017 ; Amicone et al, 2019 ), but not always ( Van den Berg et al, 2003 ; Nguyen et al, 2018 ; Cassarino et al, 2019 ; Hicks et al, 2020 ; Neilson et al, 2020 ), been associated with performance improvement after exposure to nature. Two recent meta-analyses revealed that the effect size of nature exposure on sustained attention performance was minimal ( Ohly et al, 2016 ; Stevenson et al, 2018 ) and it was noted that the mechanisms underpinning the effects of nature exposure on sustained attention performance are not well understood ( Stevenson et al, 2018 ).…”