Abstract
Adolescents are experiencing an increasing number of psychological difficulties due to mental fatigue and stress. Natural environments have been found to be beneficial to psychological wellbeing by reducing stress and improving mood and concentration for most people. However, a number of studies have suggested that this may not be the case for adolescents perhaps because they have different social and emotional needs (to be with friends, not to be bored), although evidence is lacking. In a field experiment with 120 16-18 year olds in the UK we tested restoration of stress and mental fatigue in an outdoor or indoor environment, alone, with a friend or while playing a game on a mobile phone. The findings showed greater restoration amongst adolescents who had been in an outdoor setting containing natural elements, compared with those who had been in an indoor one. Moreover, being with a friend considerably increased positive affect in nature for this age group. The findings indicated that spending short school breaks in a natural environment with a friend can have a significant positive impact on the psychological wellbeing of teenagers.