desirable:		Whether the options were desirable (TRUE) or undesirable (FALSE).
comparisonCondition: 	Whether information about the the non-endowed option was visible and without time-pressure ("encouraged"), hidden and without time-pressure ("hidden"), or visible and with time-pressure ("time-pressure)
endowmentProbability: 	The probability of the non-zero outcome occuring for the endowed gamble.
changeToTaskEndowed:	Whether, in Experiment 1B, the endowed task involved changes in what was required for the subsequent task (TRUE) or changes to the monetary payout (FALSE)
inferiorPractice: 	Whether the practice gamble presented in Experiment 3 was inferior to the subsequently endowed gamble (TRUE) or superior to the subsequently endowed gamble (FALSE). NA for the other experiments.
endowmentPosition: 	Whether the endowed option was presented to the left of the non-endowed option (1) or to the right (2).
response: 		Whether the left (1) or right (2) option was chosen.
endowmentChosen:	Whether the chosen option was the endowed item (TRUE) or not (FALSE).
responseTime: 		Time taken from when the participant was offered the decision of whether to keep the endowed option or switch to the alternative to when the final response was made.
elapsedTime: 		Time taken from when the participant was first presented information about the options to when the final response was made.