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

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

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• 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?”

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• 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

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

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“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

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common projects common commits alternating versions alternating versions in time frame

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

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

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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)

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

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