risk aversion adaptive hypothtical lottery choice task, 15 + , two sets of questions asked, A, B (rANDOMized across participants) , sets differed in amount of pay offs and likelihood of their expected pay offs , set b certain payoffs were higher than set a, the uncertian payoffs in set b had higher coefficents of varation than did those in set a, REFELCTing a higher risk - reward ratio; however many p's provided inconsicent responses across two taks; current researhc suggests taht may be poor measures of individuals differ3ences in risk preferences compared to self reports