Photo of Joseph Simmons

Joseph Simmons

Associate Professor

Research Interests: judgment and decision making, experimental methods, consumer behavior

Links: CV, Data Colada Blog

Contact Information

Address: 3730 Walnut St., JMHH 551, Philadelphia, PA 19104


Joe Simmons is an Associate Professor at the Wharton School of the University of Pennsylvania, where he teaches a course on Managerial Decision Making. He has two primary areas of research. The first explores the psychology of judgment and decision-making, with an emphasis on understanding and fixing the errors and biases that plague people’s judgments, predictions, and choices. The second area focuses on identifying easy-to-adopt research practices that improve the integrity of published findings. Joe is also an author of Data Colada, an online resource that attempts to improve our understanding of scientific methods, evidence, and human behavior.


  • Berkeley Dietvorst, Joseph Simmons, Cade Massey (2015), Algorithm Aversion: People Erroneously Avoid Algorithms After Seeing Them Err, Journal of Experimental Psychology: General, 144(1), 114 - 126.
  • Uri Simonsohn, Leif D. Nelson, Joseph Simmons (2014), P-Curve and Effect Size: Correcting for Publication Bias Using Only Significant Results, Perspectives on Psychological Science, 9 (December), 666 - 681.
  • Uri Simonsohn, Leif D. Nelson, Joseph Simmons (2014), P-Curve: A Key to the File Drawer, Journal of Experimental Psychology: General, 143 (April), 534 - 547.
  • Joseph Simmons, Cade Massey (2012), Is Optimism Real?, Journal of Experimental Psychology: General, 141 (November), 630 - 634.    Abstract  Related Materials
  • Leif D. Nelson, Joseph Simmons, Uri Simonsohn (2012), Let's Publish Fewer Papers, Psychological Inquiry, 23 (3), 291 - 293.
  • Jeff Galak, Leif D. Nelson, Robyn A. LeBoeuf, Joseph Simmons (2012), Correcting the Past: Failures To Replicate Psi, Journal of Personality and Social Psychology, 103 (6), 933 - 948.  Abstract  Related Materials
  • Joseph Simmons, Leif D. Nelson, Uri Simonsohn (2011), False-Positive Psychology: Undisclosed Flexibility in Data Collection and Analysis Allows Presenting Anything As Significant, Psychological Science, 22 (November), 1359 - 1366.  Abstract
  • Joseph Simmons, Leif D. Nelson, Jeff Galak, Shane Frederick (2011), Intuitive Biases in Choice vs. Estimation: Implications for the Wisdom of Crowds, Journal of Consumer Research, 38 (June), 1 - 15.    Abstract
  • Cade Massey, Joseph Simmons, David A. Armor (2011), Hope Over Experience: Desirability and the Persistence of Optimism, Psychological Science, 22 (February), 274 - 281.    Abstract
  • Joseph Simmons, Robyn A. LeBoeuf, Leif D. Nelson (2010), The Effect of Accuracy Motivation on Anchoring and Adjustment: Do People Adjust from Provided Anchors?, Journal of Personality and Social Psychology, 99 (December), 917 - 932.    Abstract
  • Robyn A. LeBoeuf, Joseph Simmons (2010), Branding Alters Attitude Functions and Reduces the Advantage of Function-Matching Persuasive Appeals, Journal of Marketing Research, 47 (July), 348 - 360.    Abstract
  • Leif D. Nelson, Joseph Simmons (2009), On Southbound Ease and Northbound Fees: Literal Consequences of the Metaphoric Link between Vertical Position and Cardinal Direction, Journal of Marketing Research, 46 (December), 715 - 724.    Abstract
  • Jason Riis, Joseph Simmons, Geoffrey P. Goodwin (2008), Preferences for Enhancement Pharmaceuticals: The Reluctance to Enhance Fundamental Traits, Journal of Consumer Research, 35 (October), 495 - 508.    Abstract
  • Joseph Simmons, Deborah A. Prentice (2006), Pay Attention! Attention to the Primes Increases Attitude Assessment Accuracy, Journal of Experimental Social Psychology, 42 (November), 784 - 791.    Abstract
  • Joseph Simmons, Leif D. Nelson (2006), Intuitive Confidence: Choosing Between Intuitive and Nonintuitive Alternatives, Journal of Experimental Psychology: General, 135 (August), 409 - 428.    Abstract
  • Uri Hasson, Joseph Simmons, Alexander Todorov (2005), Believe It or Not: On the Possibility of Belief Suspension, Psychological Science, 16 (July), 566 - 571.    Abstract
  • Penny S. Visser, Jon A. Krosnick, Joseph Simmons (2003), Distinguishing the Cognitive and Behavioral Consequences of Attitude Importance and Certainty: A Test of the Common-factor Model of Attitude Strength, Journal of Experimental Social Psychology, 39 (March), 118 - 141.    Abstract

Awards And Honors

  • MBA Excellence in Teaching Award, 2014
  • Winner of the Helen Kardon Moss Anvil Award, awarded to the one Wharton faculty member "who has exemplified outstanding teaching quality during the last year", 2013
  • MBA Excellence in Teaching Award, 2013
  • MBA Excellence in Teaching Award, 2012
  • One of ten faculty nominated by the MBA student body for the Helen Kardon Moss Anvil Award, 2012
  • Wharton Excellence in Teaching Award, Undergraduate Division, 2011



  • OPIM690 - Managerial Decision Making

    There has been increasing interest in recent years as to how managers make decisions when there is uncertainty regarding the value or likelihood of final outcomes. What type of information do they collect? How do they process the data? What factors influence the decisions? This course will address these issues. By understanding managerial decision processes we may be better able to prescribe ways of improving managerial behavior. Building on recent work in cognitive psychology, students will gain an understanding of the simplified rules of thumb and apparent systematic biases that individuals utilize in making judgments and choices under uncertainty. At the end of the course, students should understand the decision making process more thoroughly and be in a position to become a better manager.