Examining the Effects of Viewing Nature and Animal Smartphone Wallpapers on Affect, Behaviour, and Cognition: A Randomised Cross-Over Trial

This study aims to investigate the effects of different smartphone lock screen wallpapers on weekly perceived well-being, procrastination, and productivity in young adults. Through a pre-registered within-subject experiment, 60 participants were exposed to three smartphone wallpaper conditions: nature, animal, and neutral (control). Each participant experienced each condition over three weeks, with the order of conditions counterbalanced. Using Frequentist and Bayesian analyses, we did not find any differences between conditions across the pre-registered confirmatory outcomes (i.e., life satisfaction, positive affect, negative affect, stress, productivity, and procrastination). Exploratory outcomes related to lock screen engagement, however, revealed some meaningful effects. Animal-themed smartphone wallpapers increased recognition and distractibility, while nature-themed smartphone wallpapers were rated as more pleasing than both animal and control images. Our findings suggest that brief visual exposure to nature or animal-themed lock screens may be insufficient to influence broader well-being or behaviour. Implications for designing strategies to promote psychological health in everyday technology use are discussed.