Does your smartphone make you dumb?

Can the mere presence of a smartphone affect our intelligence? Does a smartphone that is next to us on the desk make it harder for us to concentrate? A very interesting study delivers amazing results:

Ward, A.F., Duke, K., Gneezy, A., & Bos, M.W. (2017). Brain drain: The mere presence of one’s own smartphone reduces available cognitive capacity. Journal of the Association for Consumer Research, 2 (2), 140-154.