human: Given a hyperedge-centered hypergraph: <hypergraph>, where the center hyperedge groups authors who co-authored the same paper.

Details of the hypergraph:
Center hyperedge (induced by source paper "Item's Characterization for Model's Development in Information Retrieval System Evaluation"):
  Abstract: The purpose of this paper is to introduce the concept of Item’s Characterization (IC) in the search for usable measures for use at the user-centered level of the evaluation of IR systems. However, after identifying items for use to assess measures either to evaluate the system or propose them for use in the system’s evaluation as done in this study, it is appropriate to adequately characterize the items using the right method. The survey and Factor Analytic (FA) methods were used in this experiment. Results obtained from the experiment underscored the robustness of the concept of IC as well as the FA method used. It also showed that both IC and FA will impact on the process of IR system evaluation especially from user’s perspective. But a larger sample size and a parallel method of data collection are required for future study, in order to further confirm the model’s validity.

Includes members:
  Member "The measurement of user satisfaction with question answering systems":
    also connected through other hyperedges:
      - Hyperedge HE-1 (induced by source paper "Measuring user satisfaction with knowledge management systems: scale development, purification, and initial test")

Question: Please tell me which research area the co-authored paper (i.e., the source paper of the center hyperedge) belongs to. The 4 classes are: Computer science, Mathematics, Engineering, Economics, Psychology, Business. Directly output the class name.

gpt: Computer science