Asking participants is not a great way to judge an activity's value, due to our natural biases. The study mentioned below comes to mind. That said, I suspect th

Asking participants is not a great way to judge an activity's value, due to our natural biases. The study mentioned below comes to mind. That said, I suspect the value is high. http://en.wikipedia.org/wiki/Cognitive_dissonance#Empirical_research http://en.wikipedia.org/wiki/Cognitive_dissonance#Empirical_...