Cognitive Biases: How Your Brain Tricks You

Every day, your brain makes thousands of decisions, and many of them are based on systematic errors you don’t even notice. These errors — cognitive biases — affect how you perceive information, remember events, assess risks, and interact with other people. Understanding how they work helps you avoid thinking traps and make more balanced decisions in both professional and personal contexts.

The course covers a wide range of cognitive biases: from confirmation bias and anchoring to attribution errors and the Dunning–Kruger effect. You’ll learn how biases show up in probability judgments (e.g., base rate fallacy), in social interactions (halo effect, stereotyping), and when working with data (illusion of control, hindsight bias). Memory mechanisms are discussed in detail — such as the misinformation effect and false memories. Special attention is given to biases related to decision-making under uncertainty: availability heuristic, framing effect, and sunk cost fallacy. For each bias, the course provides concrete real-world examples from everyday life, business, and scientific research.

The course methodology is based on active engagement: you’ll analyze case studies, complete exercises to recognize biases in texts, news, and advertising. Typical mistakes that even experienced professionals make when interpreting statistics and cause-and-effect relationships are covered. You’ll learn to ask clarifying questions, check your conclusions for hidden biases, and apply simple strategies to reduce the impact of biases, such as considering alternative hypotheses and delaying decisions.

The course is intended for specialists working with data and analytics: analysts, marketers, product managers, and leaders making strategic decisions. It will also be useful for doctors and clinicians who face diagnostic and risk assessment tasks every day, and for journalists who verify facts and interpret research. Developers and engineers working on user interfaces and algorithms will find tools in the course for identifying cognitive traps in design and testing.

By the end of the course, you’ll master the terminology to describe 20+ key cognitive biases, be able to recognize them in your own reasoning and in other people’s arguments. You’ll learn a framework for structured analysis of situations for systematic errors and gain a set of specific techniques to minimize them. This will help you evaluate information more critically, avoid common reasoning errors, and approach decision-making more rigorously.