A new study of the psychology of Rock Paper Scissors can teach you something about poker, too. http://www.pokernews.com/strategy/make-your-poker-game-less-exploitable-rock-paper-scissors-24419.htm
In this one, I categorize the different ways that players observe the flop. http://www.pokernews.com/strategy/six-kinds-of-players-are-taking-in-the-flop-which-are-you-24363.htm
This is a good one. I got 8/8, but I had to really stop and think hard about some of them. http://www.pokernews.com/strategy/the-weekly-pokernews-strategy-quiz-everything-is-not-even-mo-24291.htm