This experimental work is conducted within the NOVA Laboratory for Computer Science and Informatics (NOVA LINCS), in the context of a PhD thesis. NOVA LINCS is hosted at the Departamento de Informática of Faculdade de Ciências e Tecnologia of Universidade NOVA de Lisboa (DI-NOVA).

All information stated as part of this experiment is confidential and will be kept as such.

Profs. Miguel Goulão and João Araújo are the advisers of the PhD thesis where the results of this experiment will be used. They can be contacted at:
- mgoul@fct.unl.pt; +351 21 294 85 36 (ext 10731); Office: P2/17.
- joao.araujo@fct.unl.pt; +351 21 294 85 36 (ext 10747); Office: P2/3

Catarina Gralha, the student responsible for the PhD thesis, can be contacted at:
- acg.almeida@campus.fct.unl.pt; Lab: P3/12

We would like to emphasize that:

• Your participation is entirely voluntary;
• You are free to refuse to answer any question;
• You are free to withdraw at any time.

The experiment will be kept strictly confidential and will be made available only to members of the research team of the study or, in case external quality assessment takes place, to assessors under the same confidentiality conditions. Data collected in this experiment may be part of a final research report, but under no circumstances will your name or any identifying characteristic be included in the report.

Lisboa, June 2019
Catarina Gralha