After reading the "useless forum" discussion, may I submit for consideration the following study done in Boston and published by the National Institutes Of Health. Subject is distracted cycling - seems to have merit, since distracted driving is a major issue it seems to follow that the same may be true of cycling.
As a side note - two days ago I almost had a head-on accident with a phone zombie on a bike as he came around a curve on my side of the trail. I hit my brakes and shouted at him, he swerved at the last second and missed me by inches. Actually, this was the second time this has happened to me recently.
Anyway - submitted for you consideration. Have at it.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4785823/