Mining software repositories to model a collaboration between developers is quite comment nowadays, but you have to pay attention. If you consider collaboration as a boolean property, everything seems to work fine, but it's not like that in a real life. On the other hand if you want to expand the model of collaboration to some ranged value, you risk in crating one more myth.

1. Collaboration in Open-Source Projects:
Myth or Reality?
Yuriy Tymchuk, Andrea Mocci, Michele Lanza
REVEAL @ Faculty of Informatics – University of Lugano, Switzerland

3. Andrew Meneely, Laurie Williams
Socio-Technical Developer Networks:
Should We Trust Our Measurements?
ICSE 2011

4. • I have never heard of this person before
• I recognize this name, but I don’t know much about them
• I know who this person is, but I have not worked with them directly
• I have worked with this person on this project
“Next, in the context of the Example project, what
is your connection to the following people?”

5. • I have never heard of this person before
• I recognize this name, but I don’t know much about them
• I know who this person is, but I have not worked with them directly
• I have worked with this person on this project
“Next, in the context of the Example project, what
is your connection to the following people?”
• I have never heard of this person before
• I recognize this name, but I don’t know much about them
• I know who this person is, but I have not worked with them directly

6. “I know and have collaborated (by contributing
source code) with the following people:”
• Strongly disagree
• Partially disagree
• Neutral
• Partially agree
• Strongly agree
• Strongly disagree

7. “I know and have collaborated (by contributing
source code) with the following people:”
• Strongly disagree
• Partially disagree
• Neutral
• Partially agree
• Strongly agree 85
43
25
10
17

9. common projects common commits
alternating versions alternating versions
in time frame

10. 201 165
171
common projects common commits
alternating versions alternating versions
in time frame
189

11. 201 165
171
alternating versions
in time frame
189
38%(201) 31%(165)
32%(171)
common projects common commits
alternating versions
36%(189)
529

12. 38%(201) 31%(165)
32%(171)
common projects common commits
alternating versions alternating versions
in time frame
36%(189)
529
6%(11)
174
6%(11)
10%(17)
13%(23)

13. Collaboration in Open-Source Projects:
Myth or Reality?
Yuriy Tymchuk, Andrea Mocci, Michele Lanza
REVEAL @ Faculty of Informatics – University of Lugano, Switzerland
R AE E LV

14. Collaboration in Open-Source Projects:
Myth or Reality?
Yuriy Tymchuk, Andrea Mocci, Michele Lanza
REVEAL @ Faculty of Informatics – University of Lugano, Switzerland
R AE E LV