Publications

Selected Publications

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• Wojcik, S. P., Hovasapian, A., Graham, J., Motyl, M., & Ditto, P. H. (2015). Conservatives report, but liberals display, greater happiness. Science, 347, 1243-1246.
• Wojcik, S. P., & Ditto, P. H. (2014). Motivated happiness: Self-enhancement inflates self-reported subjective well-being. Social Psychological and Personality Science, 5, 185-194.
• Clark, C. J., Luguri, J., Ditto, P. H., Knobe, J., Shariff, A. F., & Baumeister, R. F. (2014). Free to punish: A motivated account of free will belief.  Journal of Personality and Social Psychology, 106, 501-513.
• Ditto, P. H., & Clark, C. J. (2014). Predicting end-of-life treatment preferences: Perils and possibilities.  Journal of Medicine and Philosophy, 39, 196-204.
• Koleva, S., Selterman, D., Iyer, R., Ditto, P., & Graham, J. (2014). The moral compass of insecurity: Anxious and avoidant attachment predict moral judgment. Social Psychological and Personality Science, 185-194.
• Graham, J., Haidt, J., Koleva, S., Motyl, M. Iyer, R., Wojcik, S. P., & Ditto, P. H. (2013). Moral Foundations Theory: The pragmatic validity of moral pluralism. Advances in Experimental Social Psychology, 47,55-130.
• Tannenbaum, D., Valasek, C. J., Knowles, E. D., & Ditto, P. H. (2013).  Incentivizing wellness in the workplace: Sticks (not carrots) send stigmatizing signals.  Psychological Science, 24, 1512-1522.
• Liu, B., & Ditto, P. H. (2013). What dilemma? Moral evaluation shapes factual belief. Social Psychological and Personality Science, 4, 316-323.
• Ditto, P. H., Liu, B., & Wojcik, S. P. (2012). Is anything sacred anymore? Psychological Inquiry, 23, 155-161.
• Iyer, R., Koleva, S., Graham, J., Ditto, P. H., & Haidt, J. (2012). Understanding libertarian morality: The psychological dispositions of self-identified libertarians. PLoS ONE. 
• Jacobson, J. A., Ji, L., Ditto, P. H., Zhang, Z., Sorkin, D., Warren, S. K., Legnini, V., Ebel-Lam, A., Roper-Coleman, S. (2012). The effects of culture and self-construal on responses to threatening health information. Psychology and Health, 27, 1194-1210. 
• Koleva, S. P., Graham, J., Iyer, R., Ditto, P. H., & Haidt, J. (2012). Tracing the threads: How five moral concerns (especially Purity) help explain political attitudes. Journal of Research in Personality, 46, 184-194. 
• Ditto, P. H., & Koleva, S. P. (2011). Moral empathy gaps and the American culture war. Emotion Review, 3, 331-332. 
• Graham, J., Nosek, B. A., Haidt, J., Iyer, R., Koleva, S., & Ditto, P. H.  (2011).  Mapping the moral domain.  Journal of Personality and Social Psychology, 201, 366-385.
• Iyer, R., Graham, J., Koleva, S., Ditto, P., Haidt, J.  (2010).  Beyond identity politics:  Moral psychology and the 2008 Democratic primary.  Analyses of Social Issues and Public Policy, 10, 293-306.
• Ditto P. H., & Mastronarde, A. J. (2009).  The paradox of the political maverick.  Journal of Experimental Social Psychology, 45, 295-298.
• Uhlmann, E. L., Pizarro, D.A., Tannenbaum, D., & Ditto, P. H.  (2009).  The motivated use of moral principles.  Judgment and Decision Making, 4, 476-491.
• Lench. H. C., & Ditto, P. H. (2008). Automatic optimism: Biased use of base rate information for positive and negative events. Journal of Experimental Social Psychology, 44, 631-639.
• Sharman, S. J., Garry, M., Jacobson, J. A., Loftus, E. F., & Ditto, P. H. (2008).  False memories of end-of-life decisions.  Health Psychology, 27, 291-296.
• Ditto, P. H. (2006). What would Terri want? On the psychological challenges of surrogate decision making. Death Studies, 30, 135-148.
• Ditto, P. H., Hawkins, N. A., & Pizarro, D. A. (2006). Imagining the end of life: On the psychology of advance medical decision making. Motivation and Emotion, 29, 475-496.
• Ditto, P. H., Jacobson, J. A., Smucker, W. D., Danks, J. H., & Fagerlin, A. (2006). Context changes choices: A prospective study of the effects of hospitalization on life-sustaining treatment preferences. Medical Decision Making, 26, 313-322.
• Ditto, P. H., Pizarro, D. A., Epstein, E. B., Jacobson, J. A., & MacDonald, T. K. (2006). Visceral influences on risk taking behavior. Journal of Behavioral Decision Making, 19, 99-113.
• Ditto, P.H., & Hawkins, N. A. (2005). Cancer decision making near the end of life. Health Psychology, 24, S63-S70.
• Hawkins, N. A., Ditto, P. H., Danks, J. A., & Smucker, W. D. (2005). Micromanaging death: Process preferences, values, and goals in end-of-life medical decision making. The Gerontologist, 45, 107-117.
• Ditto, P. H., Munro, G. D., Apanovich, A. M., Scepansky, J. A., & Lockhart, L. K. (2003). Spontaneous skepticism: The interplay of motivation and expectation in responses to favorable and unfavorable medical diagnoses. Personality and Social Psychology Bulletin, 29, 1120-1132.
• Ditto, P. H., Smucker, W. D., Danks, J. H., Jacobson, J. A., Houts, R. M., Fagerlin, A., Coppola, K. M., & Gready, R. M. (2003). The stability of older adults’ preferences for life-sustaining medical treatment. Health Psychology, 22, 605-615.
• Munro, G. D., Ditto, P. H., Lockhart, L. K., Fagerlin, A., Gready, M., & Peterson, E. (2002). Biased assimilation of sociopolitical arguments: Evaluating the 1996 U.S. presidential debate. Basic and Applied Social Psychology, 24, 15-26.
• Coppola, K. M., Ditto, P. H., Danks, J. H., & Smucker, W. D. (2001). Accuracy of primary physicians’ and hospital-based physicians’ predictions of elderly outpatients’ treatment preferences with and without advance directives. Archives of Internal Medicine, 161, 431-440.
• Ditto, P. H., Danks, J. H., Smucker, W. D., Bookwala, J., Coppola, K. M., Dresser, R., Fagerlin, A., Gready, R. M., Houts, R., Lockhart, L. K., & Zyzanski, S. (2001). Advance directives as acts of communication: A randomized controlled trial. Archives of Internal Medicine, 161, 421-430.
• Fagerlin, A., Ditto, P. H., Danks, J. H., Houts, R., & Smucker. W. D. (2001). Projection in surrogate decisions about life-sustaining medical treatment. Health Psychology, 20, 166-175.
• Smucker, W. D., Houts, R., Danks, J. H., Ditto, P. H., Fagerlin, A., & Coppola, K. M. (2000). Modal preferences predict elderly patients’ life-sustaining treatment choices as well as patients’ chosen surrogates. Medical Decision Making, 20, 271-280. 
• Ditto, P. H., Scepansky, J. A., Munro, G. D., Apanovitch, A. M., & Lockhart, L. K. (1998). Motivated sensitivity to preference-inconsistent information. Journal of Personality and Social Psychology, 75, 53-69. 
• Munro, G. D., & Ditto, P. H. (1997). Biased assimilation, attitude polarization, and affect in the processing of stereotype-relevant scientific information. Personality and Social Psychology Bulletin, 23, 636-653. 
• Ditto, P. H., & Lopez, D. F. (1992). Motivated skepticism: Use of differential decision criteria for preferred and nonpreferred conclusions. Journal of Personality and Social Psychology, 63, 568-584. 
• Ditto, P. H., & Jemmott, J. B. III (1989). From rarity to evaluative extremity: Effects of prevalence information on evaluations of positive and negative characteristics. Journal of Personality and Social Psychology, 57, 16-26. 
• Jemmott, J. B. III, Ditto, P. H., & Croyle, R. T. (1986). Judging health status: Effects of perceived prevalence and personal relevance. Journal of Personality and Social Psychology, 50, 899-905.