GESIS Summer School in Survey Methodology Applied Causal Inference Using Directed Acyclic Graphs (DAGs) 12 to 14 August 2026 | Online Beyers Louw (Rotterdam School of Management, Erasmus University)

🚀 Boost your causal reasoning with #DAGs!
Our short #GESISsummerschool course introduces key advances in causal inference and shows how to tackle challenges like backdoor paths, bad controls & selection bias — hands-on in R.

Info & registration ➡️ t1p.de/GSS26-SCE

@gesis.org

GESIS Summer School in Survey Methodology Sampling and Weighting in Survey Statistics 10 – 14 August 2026 | Hybrid (GESIS Cologne & online) Anne Konrad (Leibniz Institute for Educational Trajectories)

Modern surveys often rely on complex designs like stratification and clustering — not simple random sampling. How do you account for this?
Join our #GESISsummerschool to learn sampling and weighting techniques to properly adjust and analyze your survey data.

➡️ t1p.de/GSS26-C9

@gesis.org

GESIS Summer School in Survey Methodology Applied Introduction to Bots in Web-based Studies 10 to 14 August 2025 | Hybrid (Cologne & online) Jan Karem Höhne & Joshua Claassen (both University Hannover)

Bots in web surveys - threat or opportunity? 🤖
In our #GESISsummerschool course, learn how bots operate, how to detect and prevent them, and even how to use them for pretesting, all while considering ethics and data integrity.

Info & registration ➡️ t1p.de/GSS26-C8

#LLMs #websurveys

@gesis.org

GESIS Summer School in Survey Methodology Causal Inference Using Survey Data 10 to 14 August 2025 | Cologne Heinz Leitgöb (Leipzig University) & Tobias Wolbring (FAU Erlangen-Nuremberg)

Do you want to learn key principles and methods of #causalinference for survey data? @heinzleitgoeb.bsky.social & @tobiaswolbring.bsky.social cover fundamentals of causation, #DAGs, fixed effects, matching, DiD, RDD, IV, and more in their #GESISsummerschool course.

➡️ t1p.de/GSS26-C7

@gesis.org

GESIS Summer School in Survey Methodology Advanced Survey Design 03 to 07 August 2025 | Cologne Bella Struminskaya & Camilla Salvatore (both Utrecht University)

Survey research is changing – are you keeping up?
In our #GESISsummerschool, learn advanced survey design for the internet era, including mixed-mode & mobile surveys, weighting, big data, nonprobability samples, & data integration.

➡️ More information & registration at t1p.de/GSS26-C6

@gesis.org

GESIS Summer School Data Science Techniques for Survey Researchers 03 – 07 August 2026 | Cologne Anna Steinberg Schulten (LMU), Fiona Draxler (University of Mannheim)

Are you a survey researcher eager to learn data science?
In our #GESISsummerschool course, learn how to collect and analyze digital behavioral and traditional survey data using modern data science tools – and how to apply them effectively to real-world research questions.

➡️ t1p.de/GSS26-C4

#GESISsummerschool
#GESISworkshops

GESIS Summer School in Survey Methodology Factorial Survey Design 27 to 31 July 2026 | Cologne Carsten Sauer (Bielefeld University), Alisia Bauer (LMU Munich), Katrin Auspurg (LMU Munich)

People’s choices are rarely driven by a single factor.
Learn factorial survey design in our #GESISsummerschool to vary scenarios experimentally and study how different aspects shape attitudes and decisions.

➡️ More information & registration at t1p.de/GSS26-C1

#vignetteanalysis
@gesis.org

GESIS Summer School in Survey Methodology Advanced Questionnaire Design 27 – 31 July 2026 | Cologne Marek Fuchs (Technical University of Darmstadt)

Go beyond the basics – it’s time for smarter questionnaires! Dive into advanced #QuestionnaireDesign and explore the latest innovations to maximize response quality across survey modes and question types at the #GESISsummerschool.

Info & registration ➡️ t1p.de/GSS26-C2

#websurveys
@gesis.org

GESIS Summer School Introduction to Stata for Data Management and Analysis 22 – 23 July 2026 | Hybrid (Cologne | Online) Lynn-Malou Lutz & Sophia Hamdorf (both GESIS)

Are you new to #Stata or looking to refresh your skills in data management, analysis, and visualization?
Brush up your skills quickly and easily in our short online course at the #GESISsummerschool!

➡️ More information & registration at t1p.de/GSS26-SCB

@gesis.org

GESIS Summer School Collecting and Aggregrating Evidence Across Multiple Studies 22 – 24 July 2026 | Online Rebecca Kuiper (Utrecht University) and Jessica Daikeler (GESIS)

Dozens of studies test the same idea – how do you see the big picture? In our #GESISsummerschool course, learn with @jessdaik.bsky.social & Rebecca how to use systematic review, meta-analysis, and evidence synthesis with GORIC(A) to turn scattered findings into a coherent story.

➡️ t1p.de/GSS26-SCD

GESIS Summer School Pretesting Survey Questions 22 – 24 July 2026 | Online Timo Lenzner (GESIS) & Patricia Hadler (SHARE)

Do your survey questions really capture what you want?
Our #GESISsummerschool course teaches pretesting methods - questionnaire appraisal, cognitive interviews, and web probing - to detect and fix measurement errors before fielding your survey.

Info & registration ➡️ t1p.de/GSS26-SCC

@gesis.org

#GESISsummerschool in Survey Methodology 2026

📣 Apply Now!

👉 www.gesis.org/en/gesis-tra...

GESIS Summer School Introduction to R for Data Analysis 22 – 23 July 2026 | Cologne Jan Schwalbach & Dennis Abel (both GESIS)

Thinking about getting started with R? 💡📊

Then let Dennis (@gesis.org) & @janschwalbach.bsky.social introduce you to the wonderful world of R at our #GESISsummerschool! Learn to wrangle, analyze, and visualize data in R like a pro.

More info & registration ➡️ t1p.de/GSS26-SCA

News March 2026

📣 Our March newsletter is out! 🌷

🤩 Registration for #GESISsummerschool is now open.
🔍 Read our interview with @jkhoey.bsky.social & @jclaas.bsky.social on #Bots in web-based studies.
✨ Plus: updates on #GESISworkshops on CSS and programming.

Enjoy the read! ➡️ t1p.de/Training-NL-...

GESIS Summer School in Survey Methodology 22 July to 14 August 2026 Cologne | Online

📣 The program of the #GESISsummerschool is out & registration is open!

🗓️ 22 July – 14 Aug 2026

Venue (depending on course):
🏢 GESIS Cologne
💻 Online

More info at gesis.org/summerschool. Full program & registration at t1p.de/GSS26-Program.

GESIS Summer School in Survey Methodology 22 July to 14 August 2026 Cologne | Online

⏳ Only 6 days left until registration #GESISsummerschool opens on 2 March!
Check out the course overview on our website www.gesis.org/summerschool, pick your favorites, and start planning your summer. 🌞

@gesis.org

News December 2025

📣 Our last newsletter of the year is out!

🔍 Read our interview with Sebastian Stier, Frank Mangold & Helena Rauxloh (all @gesis.org) on Web Tracking Data.
✨ Plus, get the latest updates on #GESISworkshops and the #GESISsummerschool.
Enjoy reading our final edition of 2025 ➡️ t1p.de/training-nl-...

Training News October 2025

📣 Our October newsletter is out! 🍂
🔍 Interview w/ @macartan.bsky.social & @alanjacobs.bsky.social
✨ Updates on #GESISworkshops & #GESISspringseminar, plus a look back at #GESISsummerschool

👀 Enjoy the read: t1p.de/training-nl-...

Display of infas marketing material on the registration desk.

Display of infas marketing material on the registration desk.

Thanks to @infas.de for their long-standing support of the #GESISsummerschool! Your continued partnership makes our summer school a tradition of excellence.

Cologne cathedral with blue sky

Sc. coordinator Sebastian E. Wenz, Adm. Coordinator Jackie Schüller (in the middle in red) and Intern Sophia Hagedorn at the registration desk.

3.5 amazing weeks at #GESISsummerschool 2025 done!
Thanks to:
- participants for curiosity
- instructors for passion
- speakers for insights
- @gessunimannheim.bsky.social & @esrasurvey.bsky.social for support!

Bring on 2026!

Angelo Moretti teaching the course Introduction to Small Area Estimation.

More than halfway through Week 4 of #GESISsummerschool!
Day 4/5 and the energy is still high despite the heat ☀️
Tonight’s plan: a get-together at a traditional Kölsch brewery 🍻 – the perfect way to relax, connect, and enjoy Cologne the local way.

#Networking #KölschVibes @angelomoretti.bsky.social

Doris Stingl teaching the course Missing Data and Multiple Imputation with Florian Meinfelder online and onsite with one participant in the room.

Everyone running from the Cologne heat? 🥵☀️
Not exactly – they’ve just spread out to different corners for group work, with the second lecturer Florian in tow. The room might look empty… but don’t worry, learning hasn’t melted! 😎💻
#GESISsummerschool #HybridTeaching #summerincologne

Welcome reception in the entrance hall

Cologne Cathedral with blue sky.

Warm greetings to all lecturers and participants in the final week of the #GESISsummerschool! With our last set of courses—already in full swing, we're glad to have you online and in Cologne, where the weather is living up to the “summer” in Summer School.

Seven smiling summer school participants in a cozy brewery pub, raising their glasses in a toast, celebrating together.

Summer school participants sitting in a cozy brewery pub, chatting and enjoying each other’s company.

Two summer school guests in a cozy brewery pub, smiling while enjoying a traditional Cologne dish called “Himmel un Ääd” (mashed potatoes with applesauce and black pudding).

Summer school participants sitting in a cozy brewery pub, reading the menu together.

Wrapping up a wonderful week 3 at #GESISsummerschool! Big thanks to all participants, lecturers & sponsors @infas.de + @veriangroup.com for making it possible. From insightful sessions to a fun brewery night, it’s been a great time. Safe travels, and excited for the adventures week 4 holds!

Impressions of the welcome reception #week3 at #GESISsummerschool

Selection of nice finger food

Speaker presenting his talk.

Speaker presenting her talk.

Week 3 of #GESISsummerschool is going strong! A lively lunch brought participants & lecturers together, followed by inspiring talks from Dennis Assenmacher & Jasmin Rath. Lots of #surveymethodology insights—more to come! 🧠📊

Get together in a traditional brewery pub.

Presentation in course Advanced Questionnaire Design.

Participants with lecturers in online short course Causal Inference with Directed Acyclic Graphs (DAGs).

Lecturer in action in course Survey Sampling and Weighting.

Last day of an exciting Week 2 at the #GESISsummerschool!
Fueled by a brewery meet-up with fine food and enriching conversations, we're geared up for this final day!

Best of luck to everyone applying your new skills to future projects — and we’re excited to kick off Week 3 on Monday!

Assignments - group work in course Advanced Questionnaire Design.

Participants Anyway (left) and Richard (right) posing next to our Training Roll-Up for a keepsake photo.

Marketing & Seminar Coordinator Loretta posing next to the Verian sponsor banner

Participants gathering in front of our registration desk for a memory photo.

More than halfway through Week 2 of #GESISsummerschool!
Still going strong with lots of learning and new connections.
Excited for tonight’s get-together at a traditional Kölsch restaurant – time to unwind, chat, and enjoy Cologne the local way!
#Networking #KölschVibes

Welcome reception in the entrance hall

Selection of finger food for lunch

Barbara Felderer from GESIS (right) presenting on nonresponse bias patterns in two German probability-based panel surveys.

Matthias Roth (GESIS) is talking about using the R package resquin to investigate the quality of survey responses to multi-item scales.

Week 2 of #GESISsummerschool is rolling along nicely! We invited participants and lecturers to a get-together lunch, followed by inspiring talks: Matthias Roth on investigating the quality of survey responses, and Barbara Felderer on nonresponse bias. Excited for more #surveymethodology insights!

🚨 Last Call!
Spots are still available for our #GESISsummerschool course on Small Area Estimation!

🕒 Don’t miss your chance to join!