The NEAIR 2015 Conference Proceedings is a compilation of papers presented at the Burlington, VT, conference. Papers in this document include:(1) Strategies to Analyze Course and Teaching Evaluation Data (Kati Li); (2) Using a Mixed Methods Approach to Assess a Leadership Mentoring Program (Betty Harper); (3) Flagship Institutions and the Struggle to Complete (Brian Lashley); (4) Using Data Mining to Predict Freshman Outcomes (Nora Galambos); (5) Institutional Ethnography: A Methodology for the Study of Inequality (Elizabeth Seton Mignacca); (6) Understanding the Impacts of the Test Optional Admission Policy (Yuko Mulugetta); (7) Zoltar Speaks: Will You Complete Your Online Course? (Joseph King, Katherine Ostroot, and Joanna Ostroot); (8) Leading Institutional Change from Below: A Case Study (Carol Van Zile-Tamsen); (9) Increasing Connections to Increase Online Student Retention (Heidi M. Baez, Evgeniya Reshetnyak and Jennifer Sparrow); (10) Using Subsequent Course Performance to Evaluate the Effect of Differentiated Instruction in Math One College's Formative Experience (Jerome J. Dean); (11) Does Size Matter? Test Box Size in Online Surveys (Jennifer May and Lauren Conoscenti); (12) Using Rasch Analysis to Review the Quality of Rating Scales (Carol Van Zile-Tamsen); (13) Predicting Graduation Outcomes: Identifying Students at Risk of Not Graduating (Meg Munley); and (14) IR Practice: Using Analysis to Drive Decisions in Improving Retention (Shuang Liu). [Individual papers contain references.]