text: preferences and choices? do/how/how much do preferences bias our choices? it's for a science project (http://www.sciencebuddies.org/mentoring/project_ideas/humbeh_p019.shtml)  thanks! the link you provide is broken.  but i'll try to answer anyway. your question is rather peculiar: our choices are the expression of our preferences, so it follows trivially that our preferences bias our choices completely. in fact, without preferences, there are no choices. it's like asking: how much is temperature involved when it is cold?