From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from lists.gentoo.org (pigeon.gentoo.org [208.92.234.80]) by finch.gentoo.org (Postfix) with ESMTP id 363091381F3 for ; Tue, 18 Jun 2013 22:01:10 +0000 (UTC) Received: from pigeon.gentoo.org (localhost [127.0.0.1]) by pigeon.gentoo.org (Postfix) with SMTP id 81DC0E09AD; Tue, 18 Jun 2013 22:01:07 +0000 (UTC) Received: from smtp.gentoo.org (smtp.gentoo.org [140.211.166.183]) (using TLSv1 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by pigeon.gentoo.org (Postfix) with ESMTPS id DDD60E097A for ; Tue, 18 Jun 2013 22:01:06 +0000 (UTC) Received: from marga.jer-c2.orkz.net (D4B2706A.static.ziggozakelijk.nl [212.178.112.106]) (using TLSv1.2 with cipher DHE-RSA-AES128-SHA (128/128 bits)) (No client certificate requested) (Authenticated sender: jer) by smtp.gentoo.org (Postfix) with ESMTPSA id 54FFB33E5B9 for ; Tue, 18 Jun 2013 22:01:05 +0000 (UTC) Date: Wed, 19 Jun 2013 00:01:01 +0200 From: Jeroen Roovers To: gentoo-project@lists.gentoo.org Subject: [gentoo-project] You have been researched (again) Message-ID: <20130619000101.526e0aaf@marga.jer-c2.orkz.net> X-Mailer: Claws Mail 3.9.1 (GTK+ 2.24.17; i686-pc-linux-gnu) Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: List-Id: Gentoo Project discussion list X-BeenThere: gentoo-project@lists.gentoo.org Reply-To: gentoo-project@lists.gentoo.org Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable X-Archives-Salt: 3894b39e-7a9e-4e45-b03c-705c13e0baa5 X-Archives-Hash: eb9d9053c869a7d77d492103175a3942 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - David Garcia, Marcelo Serrano Zanetti and Frank Schweitzer Chair of Systems Design =E2=80=93 www.sg.ethz.ch =E2=80=93 ETH Zurich =3D Abstract We analyze the relation between the emotions and the activity of contributors in the Open Source Software project Gentoo. Our case study builds on extensive data sets from the project=E2=80=99s bug tracking platf= orm bugzilla, to quantify the activity of contributors, and its mail archives, to quantify the emotions of contributors by means of sentiment analysis. The Gentoo project is known for a considerable drop in development performance after the sudden retirement of a central contributor. We analyze how this event correlates with the negative emotions, both in bilateral email discussions with the central contributor, and at the level of the whole community of contributors. We then extend our study to consider the activity patters on Gentoo contributors in general. We find that contributors are more likely to become inactive when they express strong positive or negative emotions in the bug tracker, or when they deviate from the expected value of emotions in the mailing list. We use these insights to develop a Bayesian classifier that detects the risk of contributors leaving the project. Our analysis opens new perspectives for measuring online contributor motivation by means of sentiment analysis and for real-time predictions of contributor turnover in Open Source Software projects. - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - http://arxiv.org/abs/1306.3612 Merry reading, jer