Goal

The goal of this pilot study was to show relevance of the metrics while considering final users perceptions. To reach this objective, we basically calculated each of Ngo's metrics for a set of 4 interfaces and confronted the results to users reviews on the percepetion of the arrangement property related to that metric. In other words, the aim was therefore to verify whether the results that can be obtained using these formulas could be legitimate as corresponding to user reviews, what the users really perceive. In order to complete this task, we applied the following methodology:

1. select metrics to validate
2. select UIs onto which could be applied the metrics
3. quantify for each UI the corresponding metrics
4. conduct a survey among users to get their own opinions about the related visual techniques for each UI
5. confront user reviews with metrics values and discuss the results