Comment Sorting Mechanism (Score 5, Informative) 118
So the concept of a diamond ring registering more highly than junk depends on the "eye of the beholder." The images in the study were associated with receiving a reward. So a guy might not associate a diamond ring with a rewaed, but might see a pile of junk and think of all the fun he could have by building neat stuff with it.
They talk about how this research may give insight into addiction, but I really think it's just a sorting mechanism. It's our way of training ourselves from experience how to pick the most likely target from the herd, sort the best fruits from the pile, etc., in the shortest possible time.