[kschwab]

>A total of 180 undergraduate psychology students participated in the study

Ahh. I had initially assumed kids, given the penny per pump thing. Though I suppose undergrads might feel pretty anxious about risking pennies :)

[Majromax]

Since the article notes that each participant had 30 balloons, and the quoted feedback suggests that 50 pumps is a possible value, we can estimate that the expected value of the experiment to the participant is somewhere between £10 and £15.