Renege: (verb) to fail to carry out a promise or commitment
Never accept a job with the intention of turning it down if "something better" comes along. Not only is it inconsiderate and unprofessional, it also reflects poorly on Ohio State and might negatively impact another Ohio State student's opportunities with that employer. Also, employers communicate with each other and you don't want to get a bad reputation.
After you have given your decision careful consideration and accepted an offer, stop looking. Inform other employers who have extended offers that you have accepted another position. And don't accept further interview invitations or search further.