“…More recent studies have explored the impact of contextual factors on users' query reformulation behavior (e.g., Liu, Gwizdka, & Belkin, ). Besides contextual factors, system features and interface design may have an impact on users' search behavior, and thus influence query reformulation behavior (e.g., Vanopstal, Buysschaert, Laureys, & Vander Stichele, ). This can be especially true in health IR, where users have been found to have difficulty in constructing effective queries due to the complex terminology system (Zeng, Kogan, Ash, Greenes, & Boxwala, ).…”