Department of Atmospheric Sciences, Summer REU applicants have rated the interview process at Colorado State University with 2 out of 5 (where 5 is the highest level of difficulty) and assessed their interview experience as 100% positive. To compare, the company-average is 78.1% positive. This is according to Glassdoor user ratings.
Here are the most commonly searched roles for interview reports -
Really quick phone interview, where they introduce you to some members of the department, ask you questions about your application and research experience. They ask why you are interested in the dept and any future plans after the internship (e.g interest in graduate school)