▁assumption ▁that ▁individuals ▁are ▁conf ined ▁to ▁their ▁narrow ▁self - inter est . ▁Inter dep end ence ▁Theory ▁suggests ▁that ▁people ▁transform ▁a ▁given ▁pay - off ▁matrix ▁into ▁an ▁effective ▁matrix ▁that ▁is ▁more ▁consistent ▁with ▁their ▁social ▁d ile m ma ▁prefer ences . ▁A ▁prisoner ' s ▁d ile m ma ▁with ▁close ▁kin , ▁for ▁example , ▁changes ▁the ▁pay - off ▁matrix ▁into ▁one ▁in ▁which ▁it ▁is ▁rational ▁to ▁be ▁co oper ative . ▁Att ribution ▁models ▁offer ▁further ▁support ▁for ▁these ▁transformations . ▁Whether ▁individuals ▁approach ▁a ▁social ▁d ile m ma ▁self ish ly ▁or ▁co oper atively ▁might ▁depend ▁upon ▁whether ▁they ▁believe ▁people ▁are ▁naturally ▁gre edy ▁or ▁co oper ative . ▁Similarly , ▁goal - expect ation ▁theory ▁assumes ▁that ▁people ▁might ▁co oper ate ▁under ▁two ▁conditions : ▁They ▁must ▁( 1 ) ▁have ▁a ▁co oper ative ▁goal , ▁and ▁( 2 ) ▁expect ▁others ▁to ▁co oper ate . ▁Another ▁psych ological ▁model , ▁the ▁appropri aten ess ▁model , ▁questions ▁the ▁game ▁theory ▁assumption ▁that ▁individuals ▁r ation ally ▁calculate ▁their ▁pay - offs . ▁Instead ▁many ▁people ▁base ▁their ▁dec isions ▁on ▁what ▁people ▁around ▁them ▁do ▁and ▁use ▁simple ▁he ur istics , ▁like ▁an ▁equality ▁rule , ▁to ▁decide ▁whether ▁or ▁not ▁to ▁co oper ate . ▁The ▁logic ▁of ▁appropri aten ess ▁suggests ▁that ▁people ▁ask ▁themselves ▁the ▁question : ▁" what ▁does ▁a ▁person ▁like ▁me ▁( identity ) ▁do ▁( rules