Background Questionnaire

Thank you for participating in our test. Please answer the following questions:

1. General Information

Sex:	[ ] male [ ] female
Age:	____________
Occupation:	____________

2. Sight Impairment

1. Do you use a sight aid when working on the computer?

[ ] none [ ] glasses [ ] contact lenses [ ] other __________

2. Do you have any form of colour blindness?

[ ] no [ ] yes, __________

3. Education

1. Highest Educational Level Attained:

[ ] vocational training [ ] secondary school [ ] university degree [ ] doctorate

2. If you are studying or have studied, please describe your main area of study:

___________________________________

4. Use of Computers

1. How long have you been using a personal computer?

_____ years

2. How many hours per week do you use a personal computer?

_____ hours

3. Which kind of personal computer do you use most?

[ ] Microsoft Windows [ ] Apple Macintosh [ ] Unix [ ] other __________

5. Experience with Thunderbird

1. How many hours per week do you use Thunderbird?

________ hours

2. Which kind of Thunderbird services do you use?

[ ] e-mail client [ ] newsgroup [ ] calendar [ ] other __________

6. Experience with Encryption

1. Have you ever encrypted your personal communications?

[  ] yes   [  ] no

If yes, what kind of encryption?

[  ] K-9 Mail + OpenKeychain   [  ] Signal (Open Whisper Systems)

[  ] Telegram "Secret Chat" / "Geheimer Chat"   [  ] other __________

2. Do you know the term "Web of Trust"?

[ ] yes [ ] no

Do you know how it works?

[ ] yes [ ] partial [ ] no

3. Have you heard of Enigmail already?

[ ] yes [ ] no

If yes, did you try it and when?

[ ] no [ ] yes, __________

7. Experience with Usability Tests

1. Have you participated in a usability study before?

[ ] no [ ] as a test user [ ] as part of the test team

If yes, what kind of study was it?

[ ] Thinking Aloud [ ] Formal Experiment [ ] other __________