I'm putting this under Performance because I think those of us who train for this purpose may be most affected by this information.
There has been a discussion on Facebook regarding colors used on bars and how that affects dogs dropping bars. Recently a judge mentioned how there was pink tape on a triple and 90% of dogs dropped those bars. She changed the bars to another color, I think it was blue and the bar dropping of that particular triple stopped.
Star's double has red tape, her triple has blue tape I have not noticed a difference and she does seem to jump differently when using the double as opposed to a single jump.
Here is some information that I found:http://www4.uwsp.edu/psych/dog/LA/DrP4.htm
The eye color chart is interesting as well as the one that shows their peripheral vision and how that expands so much more than hours. Now I understand why trainers say that they have eyes on their backs!