An elderly man with gray hair and a mustache wearing a navy blazer and light blue shirt, standing indoors with blurred modern decorations

© Arne Sattler

Welcome to the Official Website of Gerd Gigerenzer

Discover the work of Gerd Gigerenzer, a leading psychologist and internationally acclaimed expert in decision-making, risk literacy, and bounded rationality. With decades of groundbreaking research, Gerd Gigerenzer has reshaped how we understand human intuition, heuristics, and the ways people make decisions under uncertainty.

On this website, you will find an overview of his publications, current projects, and media appearances. Whether you're a researcher, policymaker, educator, or simply curious about the science of decision-making, this platform offers valuable insights into how we can make smarter, more informed choices in an increasingly complex world.

Explore. Learn. Decide.

Welcome to a world where intuition meets intelligence.

NEWS

NEWS

Upcoming Talks

01.11.2026 | 13:40 Uhr | Main Stage

Keynote: Die Kunst des Entscheidens in unsicheren Zeiten

Immocation Festival

Leipziger Messe
Messe-Allee 1
04356 Leipzig

04.11.2026 | 11:15 Uhr | Zeremoniensaal

Panel: Making Decisions for the Unforeseeable Future

Global Peter Drucker Forum

Hofburg Kongresszentrum Vienna
Heldenplatz
1010 Wien

05.11.2026 | 19:15 Uhr | Terrassensaal C

Festvortrag: Bauchentscheidungen - Die Intelligenz des Unbewussten

DGSM Jahrestagung 2026

Rheinmain Congresscenter
Friedrich-Ebert-Allee 1
65185 Wiesbaden

14.11.2026 | 13:00 Uhr | Erlweinsaal

Keynote: Die Realität mit der wir rechnen, ist nicht die Realität in der wir leben

Deutsche Diabetes Gesellschaft e.V.

Herbsttagung

Messe Dresden
Messering 6
01067 Dresden

17.11.2026 | 19:00 Uhr | Teilnahme kostenlos

Keynote: Künstliche Intelligenz im Alltag und in der Medizin - Chancen und Risiken

Förderkreis Bad Nauheimer Gespräche e.V.

Hanauer Landstraße 152
60314 Frankfurt am Main
Telefon: (069) 76 63 50

23.11.2026 | 18:00 Uhr | CSH Salon

Keynote: Staying Smart in a Smart World: When to Trust AI—and When to Think for Ourselves

— exceptionally taking place on a Monday —

Complexity Science Hub

Metternichgasse 8
1030 Vienna, Austria
events@csh.ac.at

Interesting News

LOOKING FOR INVESTORS

Four people standing together indoors, smiling at the camera, with a curved gray wall, bulletin board, and glass staircase in the background.

from left to right: Florian Artinger, Philipp Leipold, Susanne Jung and Gerd Gigerenzer

Black silhouette vector of a woman with a ponytail, wearing a dress, standing and holding an umbrella, with colorful circles around in purple, yellow, and orange.

Most people assume that good decisions require more time and more information. My research over the past decades suggests otherwise.
Good decisions can be made quickly. They save time, reduce costs, and enable organizations to act—even when situations become complex.

This conviction is why I founded Simply Rational – The Decision Institute.

Today, we help organizations make decisions that are bolder, safer, and grounded in science. The need for responsible decision-making is growing, especially as uncertainty and AI reshape how organizations operate.

To continue building on this path, Simply Rational GmbH has opened a funding round.

Until October 2026, we are looking for investors who share our vision and want to help shape the company’s next phase of growth.

The funding will support three priorities:
→ advancing our next stage of development and innovation
→ strengthening our science-based solutions
→ scaling our impact within organizations

We would be pleased to hear from people who share our core belief: good decisions are the foundation of resilient, innovative, and successful organizations—organizations that keep people at the center.

If you believe in this mission and would like to help shape what comes next for Simply Rational, let’s talk.

Our Managing Directors, Susanne Jung and Philipp Leipold, will be happy to provide further details.

www.simplyrational.de

QUIZ

QUIZ

Test yourself: Risk Literacy

Test yourself: Minimal Medical Statistical Literacy

Test yourself: Short Quiz to test your statistical literacy