Guest Editors: André Bittermann1, Tanja Burgard1 Leibniz Institute for Psychology, Trier, Germany We are pleased to announce that selected contributions to the 4th Symposium on Big Data and Research Synthesis (www.ressyn-bigdata.org) will be published (following peer-review) with Europe's Journal of Psychology (EJOP) in 2024. The special EJOP issue on “Psychological Research in Times of Big Data” has the goal to inform the scientific psychological community about current approaches that help to deal with information overload – from screening automation in research synthesis to machine learning techniques for high dimensional data. The symposium is organized by the Leibniz Institute for Psychology (ZPID) in collaboration with DIPF | Leibniz Institute for Research and Information in Education. It will take place in Frankfurt/Main, Germany from May 8 to May 10, 2023. The deadline for submitting structured abstracts is February 15, 2023. The symposium addresses the question: “Psychological research in times of big data: How can machine learning and open science help to cope with the information overload?”. Submissions from psychology and related fields (e.g., social sciences, education sciences) are welcome. Presentations can include both applications as well as methodological and technical innovations and tools. Relevant topics include (but are not limited to): Machine learning applications for handling big data with relation to open science Contributions on open syntheses / research syntheses with relation to open science Studies employing screening automation using machine learning assistance Contributions addressing the (in)compatibility of machine learning and open science Comparison/validation of machine learning based screening automation tools Open science tools and practices in context of big data, research syntheses, information overload Submission Guidelines Authors who wish to present at this symposium are invited to submit a structured abstract via the symposium website. Structured abstracts should contain between 250 and 500 words. For the presentation of empirical research, abstracts should encompass information on each of the following headings: (a) Background, (b) Objectives, (c) Research question(s) and/or hypothesis/es, (d) Method/Approach, (e) Results/Findings (expected), (f) Conclusions and implications (expected). For abstracts addressing methodological issues or demonstration of tools, this structure may be adjusted accordingly.