Researchers studying athletes found that those who played mainly for the love of their sport actually had sharper vision during athletic competitions than those whose main goal was winning a trophy or championship.
Statements
Comparison - a Difference playing for sharper playin' 4 the love vision that chip of the game > (for a trophy)
Causal Difference-Maker (because)
The vision was sharper, because our sharpness of vision is determined by our ability to focus on the activity itself. So ...
CAUSE EFFECT(s) ability to focus on increased sharper the activity itself concentration vision
Evaluate
This stimulus is my dream come true, because it speaks to every scrappy blacktop basketball player out there. When you're just playing for the love of the game, rather than peripheral concerns like trophies or championships, you have sharper vision, because you're more focused on the activity itself.
"Sharper vision" is the overlapping term in these two facts, so we want to think about how these two facts about "sharper vision" combine.
The second sentence is a monster. It's saying that there's a correlation between "focused on activity itself" and having "more concentration".
attention is focused || more concentration on activity itself
Concentration is necessary for acute (sharper) vision. And they're implying that the vision of the group playing mainly for the love of their sport was sharper because they possessed a greater degree of that vision-concentration.
Putting those two together, we're getting this rough idea that,
the more your attention the more you the sharper is focused on activity can concentrate your vision
In the first sentence we were told that people who play for the love have the sharper vision. So we can infer that people who play for the love have more attention focused on the activity itself.
Goal
Look for a safely worded claim, probably dealing with the crossover (basketball pun intended) idea that