Ss is, the more purposeful and?2010 The Psychonomic Society, Inc. Correspondence concerning this article should be addressed to S. B. Klein, Department of Psychology, 551 Ucen Road, University of California, Santa Barbara, CA 93106 (klein@psych.ucsb.edu).Klein et al.Pageproactive the responses to the environment can be (e.g., Donald, 1991; Lombardo, 2008; Suddendorf, 1994; Suddendorf Corballis,