R++ est un logiciel d’analyse statistique haute performance. Simple, rapide, efficace. Pour mettre les statistiques à la portée de tous.


Human-Computer Interface

Definition: HCI

The Human-Computer Interface (HCI) is the study of how people interact with computers. The aim is to design modern and friendly user interface, to allow users to work better and more easily.


One of HCI’s tools is a video prototyping session. Sessions usually gather 6 to 10 persons, half of them are users, the other half are HCI specialists. There are four stages:

1- The problem

During the first brainstorming session the grievances are received. The users have to reply the questions “What’s really hard with the current software? What takes an entire day when you counted on one hour? What is difficult, boring, sensitive, long, risky, source of error…?

Opposite / below / above (selon position) is the simplified result of a mini-session about statistical analysis softwares

2- The solutions

The group picks a specific problem to work on. In the present instance they chose to deal with the exportation of the results.

Smaller groups are made and work independently. The objective is to hand-design an interface that would solve the identified problems. At this stage the users must not deal with technical details such as questions of computer power, they focus on what would really be handy and friendly.

In the example, among many other ideas: someone would like to copy and paste several results at once from R to Excel; someone else proposes to incorporate a table editor into R. Eventually the subgroup proposes a combination of both solutions: an integrated table editor that allows complex copy and paste.

3- Video prototyping

When the interfaces are ready in our minds, we make small videos. We represent our dreamed interface with papers, post-its, felt pens, scissors, and we film it.

Opposite / below / above (selon position) you can display the example of the table export.

4- Feedback from the others

The videos are shown to the rest of the team in order to have a feedback. Does the solution look interesting to them? Friendly? Does it solve the starting problem?

Even better, these mini-videos may inspire new ideas that will go even further, towards more efficiency.


At the end of the day, in barely three hours we managed to:

  • Identify the users’ real problems
  • Find rough outlines of solutions
  • Get feedbacks from the other members of the group

Click here to download the illustrative Powerpoint

After the session

The computer engineers summarize the videos and formalize them.