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 "On the evocative power and play value of a wearable movement-to-sound interaction accessory in the free-play of schoolchildren"):
  Abstract: This paper discusses the evocative power and play value of the Wearable Sounds Kit WSK, a movement-to-sound interaction accessory. Whilst movement-to-sound interaction is attracting growing research attention in HCI, very little of it has been conducted in the context of free-play with children. This paper presents a participatory design study of the WSK with 20 school-aged children 7--12 years old in a free-play scenario, and an evaluation of the WSK in a playground at Ars Electronica Festival with over 70 school-aged children. The evaluation addressed three research questions: can school-aged children incorporate the WSK into their free-play? What free-play patterns are encouraged by the WSK? Which design features of the WSK influence the free-play experience? By conducting qualitative and quantitative data gathering methods and analyses, which include first-hand observations and video-coding, this paper shows that school-aged children can effectively incorporate the WSK into their free-play, and that the accessory encourages different types of free-play. The results also show differences in the free-play mediated by the accessory depending on the age group and sex of the player, and these differences reinforce the play value of the WSK. Some implications for designing technologically-oriented playful toys are also discussed.

Includes members:
  Member "Aerial tunes: exploring interaction qualities of mid-air displays":
    also connected through other hyperedges:
      - Hyperedge HE-1 (induced by source paper "LinkLights: a modular, user adaptable system to support rehabilitation practices")
  Member "The Things We Play with Roles of Technology in Social Play":
    also connected through other hyperedges:
      (none)

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