Sunday, December 8, 2013

Testing of paper prototype

Initial User Tests

This week we tested our newly built paper prototype on three users. We gave each of them a short introduction and asked them to each complete the three following tasks:

Task 1: Changing Volume

First of all we wanted to know how they would change the volume of the music or their part. All of them told us unanimously they would like to control it by changing their distance to the screen. Moving away from the screen should lower the volume.

Task 2: Trigger special effects

The second task was to think of gestures or poses to trigger some special effect. In our team we initially thought to trigger some effects by crouching down, this was not a gesture any of the users would have tried by themselves because it is a quite unnatural movement while dancing. They instead suggested gestures like touching their own hands, moving the head and turning their back to the screen. To initiate a crouching gesture, a visual hint was proposed.

Task 3: Pass instruments between users

Last but not least we requested our users to pass the different instruments to each other. Every user intuitively tried this by touching the other players’ hand. This confirms our initial design decision to be a good practise.

Additional feedback

Some users pointed out that we have to be careful with gestures that need to put an arm above the head for a extended amount of time because this gets exhausting pretty fast.
Furthermore, two users prefer first person to have full control over all instrument simultaneously until a second person joins the game.


Mostly all of the suggestions concern the gestures and movements that control the music. Like we already learned in our interviews, they should easily incorporated into dancing so we shouldn’t assume that positions such as crouching down might be tried without additional hints. We therefore introduced a new visual element that invites the user to try new and unusual gestures, like in the following picture.

Furthermore, additional gestures like moving the head or turning the body away from the camera should be implemented to trigger special effects. These are being ideated now.

To address the additional feedback, we will design the controls in such a way that a single user has the possibility to control every aspect yourself as long as no other player entered the game. Additionally, fatigue of arms are a concern when implementing the final gestures.

Task Breakdown

Ideation: Full team
User tests and taking pictures: Chris
Blogpost: Alex, Chris

The following is a picture of our testing process. Please be reminded that it also incorporates a simple audio feedback to emulate the systems response to the user.

Monday, December 2, 2013

Paper Prototype

We prepared a Paper prototype  to check the basic interaction with re:aktion. It's considered to be helpful to observe difficulties in the way of interacting with the system in an early state, with low cost and effort. We looked into three scenarios, representing the very basic feature our system should provide.

List of tasks

Catching the user's attention

Abstract visuals and the invitation to "move" should attract people and get their attention. A simple music pattern is already playing, reaching people who can't actually see the display.

As the user comes closer, he sees himself as some kind of silhouette, mirroring his movements

When the user begins to move he is is probably triggering some implemented change of the music pattern. He becomes aware of the influence he has on the music... and it is on!

Multi user interaction

With re:aktion, you are in control of the music you're dancing to. The height of your right hand will set the complexity level of the instrument assigned to you.
A higher hand position will trigger a more complex pattern, while a lower hand position will cause to reduce the complexity.
As visual feedback abstract forms will be displayed around the hand of the silhouette. The variation of the forms are correlated with the complexity of the pattern.

Left and body position are responsible for filtering of the signal and other effects.

Changing instruments

To change instruments just touch the hands of another user.

The visuals have different colours for each instrument. After the exchange the colour of the visuals will of course change respectively.

Task breakdown

Brainstorm & UX design: Full team
Cutouts: Eduard
Photo edit: Benoit, Chris
Blog update: Xavier, Chris