Data variables:
- Study: 1 is Study 1 and 2 is Study 2
- ID: subject ID
- Gender, Age, Educ: demographic information
- Case: dilemma type, "car" = car dilemma, "hostage" = hostage dilemma
- ActualChoice: subjets' choices; "KL" = K; "NK" = ~K
- condition:  
	- twodecisionlate = two alternatives, probability judgments are made before choices
	- twodecisionfirst  = two alternatives, choices are made before probability judgments
	- thirdgood = three options; the third is the best choice
- PO.KL: Probability estimate of positive outcome given K
- NO.KL: Probability estimate of negative outcome given K
- PO.NK: Probability estimate of positive outcome given ~K
- NO.NK: Probability estimate of negative outcome given ~K