Running head: REGRESSION AND THE CONGRUENCY SEQUENCE EFFECT 1 Removing the Influence of Feature Repetitions on the Congruency Sequence Effect: Why Regressing Out Confounds From a Nested Design Will Often Fall Short James R. Schmidt, 1 Maarten De Schryver, 1 & Daniel H. Weissman 2 1 Department of Experimental Clinical and Health Psychology, Ghent University, Belgium 2 Department of Psychology, University of Michigan Author Note James R. Schmidt is a postdoctoral researcher of the Research Foundation – Flanders (FWO – Vlaanderen). Maarten De Schryver is supported by Methusalem Grant BOF09/01M00209 of Ghent University. We would like to thank Wim Notebaert and Tom Verguts for their input on this paper and for providing us with added data, which allowed us to check our fitting procedure (though we opted not to calculate a lack-of-fit test for these data for the reasons described in Footnotes 1 and 3). We would also like to thank J. Toby Mordkoff for providing us with extra data. Correspondence concerning this article can be addressed to James R. Schmidt, Ghent University, Henri Dunantlaan 2, B-9000 Ghent, Belgium. E-mail: james.schmidt@ugent.be.