**Overconfidence persists despite years of accurate, precise, public, and continuous feedback: Two studies of tournament chess players** *Heck, Benjamin, Simons, & Chabris* ---------- All public materials, data, and analysis scripts for this project are available in components shared via OSF (https://osf.io/jqu3y). ---------- **Preregistration**: *Each component that begins with **“Preregistration:”** shares a preregistration file, and in some cases accompanying analysis code or other supporting information, for each of four points in this project.* - **“Preregistration: Pilot Study of USCF Members”** (https://osf.io/6pb8u/) contains the preregistration file describing our approach to pilot testing the survey methodology. - **“Preregistration: Full Data Collection Launch”** (https://osf.io/fuba8/) contains the preregistration describing our full study launch, registered before launch. - **“Preregistration: Confirmatory Analyses”** (https://osf.io/gf7kr/) contains the preregistration describing our confirmatory hypotheses and analyses, registered while still blind to the final data. - **“Preregistration: Secondary and Other Preregistered Analyses”** (https://osf.io/fmuh9/) contains the preregistration describing our preregistered confirmatory hypotheses and analyses, registered while still blind to data other than those used in the confirmatory analyses. ---------- **Study Materials**. The component **“Study Materials”** (https://osf.io/56vkz/) contains all study materials used during this project. These include Qualtrics survey exports (.qsf, .docx, and .pdf) of pilot and final survey instruments used to collect data for this project. ---------- **Public Data** The component **“Public Data”** (https://osf.io/s3rjh/) contains all publicly available datasets constructed and used during this project. It also contains a list of variables that are publicly available and whether they have been deidentified, and a codebook file that contains variable descriptions and response types, ranges, and options. ---------- **Analysis** The component **“Analysis”** (https://osf.io/t2cqn/) contains two subcomponents that each contain public analysis scripts operating on the public data for this project. - Note that the steps taken to protect participant anonymity described in the Wiki for this project prevent these scripts from exactly reproducing some of the results reported in the article. Additionally, analyses that require potentially identifying individual-level variables (e.g., participant age) will not run and are tagged in the script files as “#DOESNT RUN.” - Each subcomponent contains all relevant datasets necessary to run the analysis scripts, the list of public variables, the codebook, and a readme file. - **“All Analyses and Figures: Main Text”** contains analysis scripts and datafiles that generally reproduce the results and figures in the manuscript main text. These analysis scripts reference page and line numbers in the conditionally accepted version of the manuscript (“ChessManuscript_MainText_PublicArchive.pdf”). - **“All Analyses and Figures: Supplement”** contains analysis scripts and datafiles that generally reproduce the results and figures in the manuscript supplement. These analysis scripts reference page and line numbers in the conditionally accepted version of the manuscript supplement (“Method&Results_Supplement_PublicArchive.pdf”). ---------- **Online Supplement** The component **“Online Supplement to Main Text”** (https://osf.io/7nrjq/) contains a .pdf version of the online supplement reporting additional details on transparency, materials, method, analyses, and results. ---------- **Contact or further questions** Interested researchers can contact Patrick Heck at pheck1000@gmail.com with any questions about the public archive, analyses, or privacy-protected data that are not made public.