2. Choosing your user panel

It's essential to clearly define your user profiles. By profile we mean the measurable and distinctive parameters of the users targeted by the system.

For example:

• physical characteristics (anthropometry, physiology, etc.) ;

• cognitive characteristics (psychology, attitude...) ;

• personal characteristics: (seniority, training, gender, age, etc.).

In fact, it's important to think about the criteria that will enable you to discriminate between the results and the users you're looking for, before organizing the tests. We advise you to think about how you want to analyse the results, and what conclusions you want to draw to validate or refute your hypotheses. Physical observables often seem to be the easiest to evaluate,...