A visitor cannot participate in an experience they mistake for a video. The design must answer three questions from a few steps away: Is this responding to people? What can I do? What happens if I try? The answer may be a visible response to movement, an obvious physical control, or a staff invitation. None is universal; the right cue depends on the venue, audience, and interaction.
Let the display demonstrate its response
In a lab and three-week shop-window field study, Müller and colleagues tested how passers-by noticed an interactive display. A live mirrored image or silhouette communicated responsiveness more effectively than the study's conventional attract sequence. The field study recorded 502 interaction sessions; it also observed a “landing effect,” where some people noticed interactivity only after walking by and then returned. These results concern shop windows, not a guaranteed lift for a trade show or museum. The transferable question is whether the first feedback makes the cause-and-effect relationship visible. Müller et al., CHI 2012.
For a touch display, that might mean a large, concrete prompt and an immediate response after the first tap. For a motion installation, it might mean a clearly marked interaction zone and visible feedback to a deliberate gesture. If the screen reacts to every passer-by, people may not know whether they have joined an experience or merely triggered an ambient effect. Show the start and exit states as deliberately as the visual spectacle.
Design for the person who is watching
Public interaction is social. A separate field study of the Communiplay display connected six locations and found that visible participation by other people drew additional interaction in that specific setup. The authors called this a local and remote “honey-pot” effect. It is evidence that other participants can act as a cue, not proof that crowding always helps. Müller, Eberle and Tollmar, CHI 2014.
Give bystanders enough information to understand what is happening: the goal, the result of a turn, and when the next person can begin. Avoid a private screen whose only visible activity is someone reading a long menu. If participation is personal, protect the participant's choice and privacy rather than making every action public for spectacle.
Test the first ten seconds, not only the finished game
Set up a realistic prototype where people will approach from the actual aisle. Ask first-time visitors what they think it does before anyone explains it. Observe where they stop, whether they can identify the first action, and whether they know a turn has ended. Record passers-by, people who notice, people who try, and people who complete; these are different stages. A participant's enthusiastic comments after a guided demo cannot reveal an unnoticed display.
Test the prompt from the approach distance and under event lighting and noise. Remove one instruction at a time until the first action remains clear. If staff must explain the interface to every visitor, decide whether a staffed demonstration is part of the intended experience or a patch for unclear design. A staff member can be valuable; it is a scope and capacity choice that should appear in the brief.
Make the invitation honest
The attraction should demonstrate the actual interaction. If the display promises a custom result but only plays a fixed animation, visitors may feel misled. If a camera responds to movement, mark where it sees participants and provide a way to decline. If a child or a seated guest cannot use the same movement, offer an alternative interaction rather than promising universal access without testing it.
Archv builds interactive experiences around participation. The first design review should therefore include the view from the aisle, the start cue, and the observed first-time response—not just a polished final screen.