Sarah Beecham Helen Sharp Nathan Baddoo Tracy Hall Hugh Robinson Does the XP environment meet the motivational needs of the software developer? An empirical study. 37-49 2007 conf/agiledc/2007 AGILE http://doi.ieeecomputersociety.org/10.1109/AGILE.2007.22 db/conf/agiledc/agile2007.html#BeechamSBHR07