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 "Coordination of referring expressions in multimodal human-computer dialogue."):
  Abstract: This study examines coordination of referring expressions in multimodal human-computer dialogue, i.e. to what extent users’ choices of referring expressions are affected by the referring expressions that the system is designed to use. An experiment was conducted, using a semi-automatic multimodal dialogue system for apartment seeking. The user and the system could refer to areas and apartments on an interactive map by means of speech and pointing gestures. Results indicate that the referring expressions of the system have great influence on the user’s choice of referring expressions, both in terms of modality and linguistic content. From this follows a number of implications for the design of multimodal dialogue systems.

Includes members:
  Member "The efficiency of multimodal interaction: a case study.":
    also connected through other hyperedges:
      - Hyperedge HE-1 (induced by source paper "A comparison of speech and typed input")
  Member "Children’s convergence in referring expressions to graphical objects in a speech-enabled computer game":
    also connected through other hyperedges:
      - Hyperedge HE-2 (induced by source paper "Pitch adaptive MFCC features for improving children's mismatched ASR")

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