**Project Number**: AC2059 **Contributors**: Haley Eckhert, Harley Paul, McKayla Pickering **Faculty Supervisor**: William E. Davis Project Overview ---------------- This project is a replication of Experiment 1 from Turri, Buckwalter, and Blouw (2015) conducted at Wittenberg University as part of the [Accelerated CREP][1]. The study was conducted online using the pre-built SocSciSurvey base questionnaire for the Accelerated CREP project without modification, other than to add a consent form and debriefing. Participants were recruited from the Psychology Department Subject Pool at Wittenberg Unviersity and received research participation credit for their classes. Data collection occurred in the spring and fall semesters of 2020. The target sample size of 50 participants was met as a total of *n* = 85 participants completed the study. **Procedure** Participants were recruited from psychology courses at Wittenberg University offering research participation credit. Participants completed the study online at a time and place of their choosing by following a link to the SocSciSurvey questionnaire. After completing the study, participants were redirected to a separate debriefing page that will allow them to provide information needed to grant their research participation credit. In the study, participants read three vignettes ("Darrel", "Gerald", and "Emma") presented in random order without replacement. Each vignette was randomly assigned to a belief condition (knowledge control, Gettier case, and ignorance control) and counter-balanced to ensure that each participant experienced all three vignettes and all three belief conditions once. Randomization, condition assignment, and counter-balancing was conducted automatically by the SocSciSurvey system used to administer the survey. For each vignette, participants were asked to respond to several questions before moving on to the next vignette, including ratings of the extent to which the person in each vignette "knows" versus "only believes" (see materials). **Hypothesis** Consistent with the original Turri et al. (2015) findings, we predicted that participants will rate vignettes from the knowledge control and Gettier case conditions similarly high in "knowing" compared to lower ratings of "knowing" for the ignorance control condition. **Results** We replicated the results from the original Turri et al. (2015) study in only one of the three vignettes, with participants in the knowledge control and Gettier case conditions providing significantly higher knowledge ratings than participants in the ignorance control condition for the Gerald vignette. Knowledge ratings for the Darrel and Emma vignettes were not significantly different across conditions. ---------- **Reference** Turri, J., Buckwalter, W., & Blouw, P. (2015). Knowledge and luck. *Psychonomic Bulletin & Review, 22*(2), 378-390. [1]: https://psysciacc.org/2018/04/08/the-accelerated-crep/