How tangible interaction supports collaboration through visibility, shared action, and design.

01.04.2026

“With tangible interfaces we act within and touch the interface itself.” (Eva Hornecker & Jacob Buur)

Physical artifacts can play an important role in collaborative interaction. Unlike screens, keyboards, and mice, tangible and spatial interfaces create a shared space of action that several people can perceive and manipulate together. They therefore matter not only for individual usability, but also for social coordination. At the core of this idea is a simple observation: collaboration becomes easier when actions, intentions, and system states are visible to others. Tangible interaction moves activity into objects, movements, and spatial arrangements, turning individual action into part of a shared interaction setting.

Visibility and Shared Reference

One of the main strengths of physical artifacts is that they make thinking and acting visible. Information appears in objects, gestures, and changes within a shared workspace rather than remaining hidden in a private interface. This helps participants see what is happening, who is acting, and where attention is directed.

Physical artifacts also function as shared reference points. People can point at them, move them, pass them around, or arrange them together. In this way, artifacts do not simply serve as input devices, they also anchor communication and support coordinated action.

Direct and Embodied Interaction

Another important quality of tangible systems is their directness. Physical manipulation relies on familiar bodily skills such as grasping, moving, turning, or placing. Compared to abstract input through mouse and keyboard, this can lower the threshold for participation and make interaction feel more immediate.

Especially in group settings, this embodied quality can make it easier for people to join in and engage with the system.

Why Space and Social Context Matter

Collaboration is shaped not only by objects, but also by spatial arrangement and social context. Group interaction depends on where an interface is placed, how large it is, and how access is distributed among participants. A system may technically allow multiple users, but still make collaboration difficult if only one person can easily reach or control it.

At the same time, interaction is influenced by the social situation in which the system is used. Familiarity between participants, group norms, and the atmosphere of a setting affect how people act together. Tangible and spatial interfaces should therefore not be seen as neutral tools, but as mediators within socially organized situations.

When Multi-User Does Not Mean Collaborative

A common design mistake is to assume that simultaneous access automatically creates collaboration. In practice, many systems are technically interactive for more than one person, but still structured around single-user logic.

Several problems can emerge:

  • interaction may become hard to coordinate,
  • individual users may dominate,
  • people may act in parallel without truly collaborating,
  • latecomers may struggle to join,
  • and too little or too much structure can both create difficulties.

These problems show that collaboration does not arise automatically from technical capability. It must be actively supported through design.

Designing for Social Interaction

For this reason, social interaction should be treated as a central design concern. Systems intended for shared use need to be designed not only for individual operation, but for joint action.

This involves several principles:

  • support multiple users through distributed access and shared visibility,
  • keep states and action histories legible,
  • use spatial arrangement to structure cooperation,
  • match the level of structure to the task and the group,
  • and keep interaction simple enough that people can focus on content rather than mechanics.

Examples in Practice

These ideas can be seen in different interactive systems. A camera-based change of one’s own appearance can turn personal interaction into a shared social experience. The simultaneous use of a multitouch table shows how several people can act on the same interface at once, while also revealing challenges of coordination and access. Sound-image tables demonstrate how tangible and spatial interaction can create shared reference points for communication and exploration.

Conclusions

Tangible and spatial interfaces offer important opportunities for collaboration because they can make action visible, create shared reference points, and lower the threshold for participation. At the same time, multi-user access does not automatically lead to cooperation. Poorly designed systems may still produce confusion, exclusion, or domination by individual users.

An important open question remains: how much structure is needed to support collaboration without making interaction too rigid? Future work should continue to explore how visibility, access, spatial arrangement, and social context can be balanced so that shared interaction remains both coordinated and open-ended.

References

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Hornecker, E. & Buur, J. (2006): Getting a Grip on Tangible Interaction: A Framework on Physical Space and Social Interaction. In: Proceedings of the SIGCHI Conference on Human Factors in Computing Systems (CHI 2006). Available at: https://ehornecker.de/Papers/FrameworkCHI.pdf (accessed 01.04.2026).

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Disclosure Statement

This text was prepared with the assistance of the AI language model GPT-5.4, which was used for drafting and linguistic revision. The author defined the content requirements and remains responsible for the final version.