2021 Yes https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8304383/ Anabitarte, A Europe Experimental Epidemiology Study Students Elementary (K-5) Attention network test Natural spaces Mental health Reml our experimental results do not support the hypothesis that students’ exposure to activities in green vs. grey spaces affected their performance in ANT. This was so despite the fact that neither age nor gender biases have been detected and despite that our experiments have been proved to be sufficiently statistically powerful. It would be advisable to consider air pollution and noise. We also recommend that participants attend the experiment with mental exhaustion to maximize the ability to detect significant changes.