Errata for "Validating the Use of Topic Models for Software Evolution", Thomas et al., SCAM 2010 Last updated: July 25, 2011 * Page 4, 1st column: The equation for scattering should be negated: \mbox{S}(z_k, V_i) = -\displaystyle\sum_{j=1}^{|V_i|} d_{ji}(\theta_k)\times \mbox{log}\ d_{ji}(\theta_k)