Recommendation letters are very important parts of your application. We require THREE letters of recommendation from professors and research supervisors and no more than four. If you have had research experience, one of the letters must be from a research supervisor, preferably the most recent.  

If you cannot obtain a letter from your most recent research supervisor, please include an explanation at the end of your personal statement and ask other recommenders to comment on your research experience. If you are currently enrolled in a Ph.D. program, we also require a letter from your current research advisor or graduate program director.

When selecting your referees, please consider that we ask them to comment on your desire to be a scientist, intellectual capability, creativity and imagination, scientific background in coursework, laboratory and/or technical skills, comparison to other Ph.D. students, suitability for graduate school and research, ability to complete long-term tasks, ability to interact with others, honesty, integrity and maturity.

You will be asked to enter each recommender's name and email address into the application system which will send an email invitation to your recommender. You can check the status of your recommendation letters, transcripts, etc. on the status page and determine if the request has been sent, received, or the recommender reminded. To assure your recommenders that their comments are confidential, we require that you waive your right to view your letters of recommendation and we notify your recommenders accordingly.

If you need to change recommender information before the recommendation has been submitted, contact the Admissions Office at Once we receive a letter of recommendation you cannot change the information.