RRR project to replicate Strack, Martin, & Stepper (1988) -------------------------------------- This OSF Page includes all of the relevant information for a *Perspectives on Psychological Science* Registered Replication Report of Strack, F., Martin, L. L., & Stepper, S. (1988). Inhibiting and facilitating conditions of the human smile: a nonobtrusive test of the facial feedback hypothesis. Journal of Personality and Social Psychology, 54(5), 768-777. http://dx.doi.org/10.1037/0022-3514.54.5.768 The approved protocol was proposed by E-J Wagenmakers, Titia Beek, and Laura Dijkhoff and was developed with assistance from Fritz Strack who provided original materials and Ursula Hess who vetted the protocol. This site includes a copy of the official protocol, the forms for others who wish to join this registered replication project, and a link to an OSF page created by the proposing team that includes all materials and instructions. If you would like to participate in this project, submit a completed Secondary Replication Proposal Form and submit it via the Manuscript Submission System at *Perspectives on Psychological Science*. You can find the form and instructions under the How to Participate Link (if you don't see it now, click on "Dashboard" above). If your proposal is approved, you will be added to this project and we will help you to create a linked project for your independent replication study. All completed replication studies will be published together in a single article at *Perspectives on Psychological Science*, regardless of their outcomes. All groups conducting replications will be expected to post the data from their study to their linked project page upon completion of the study. *Important Note: The protocol specifies the minimum requirements for participation, but we encourage those participating in this replication effort to use as large a sample as possible. Larger samples will provide a more precise estimate of the effect size, and smaller confidence intervals for each contributed study will lead to a better overall estimate of the effect size as well. Please specify your proposed sample size in your Secondary Replication Proposal Form.*