This is an overview of the NTCIR-16 Session Search (SS) task. The task features the Fully Observed Session Search subtask (FOSS) and the Partially Observed Session Search subtask (POSS). This year, we received 28 runs from 6 teams in total. This paper will describe the task background, data, subtasks, evaluation measures, and the evaluation results, respectively.
Chen et al. (Tue,) studied this question.