Science
Psychology Facts Quiz
Cognitive biases, famous experiments, and the science of the mind — how much do you know?
Cognitive biases, famous experiments, and the science of the mind — how much do you know?
Over 200 known cognitive biases shape how humans think, decide, and remember every single day. This quiz draws from a pool of 50 questions spanning famous experiments, mental shortcuts, personality theories, and the pioneers who built modern psychology — from Freud's couch to Kahneman's Nobel Prize.
Each round presents 10 multiple-choice questions at a medium difficulty level. Select your answer, read the instant explanation, and track your score. No timer, no signup — take it as many times as you like with randomized question order.
Questions cover landmark experiments like Milgram's obedience study and the Stanford Prison Experiment, cognitive biases such as the Dunning-Kruger effect and confirmation bias, personality frameworks, social psychology phenomena, and the psychologists who changed how we understand the human mind.
The Dunning-Kruger effect is a cognitive bias in which people with limited competence in a domain tend to overestimate their own ability. First described by psychologists David Dunning and Justin Kruger in 1999, the effect also shows that highly skilled individuals often underestimate their competence relative to others.
Some of the most influential psychology experiments include Stanley Milgram's obedience study (1961), Philip Zimbardo's Stanford Prison Experiment (1971), Ivan Pavlov's classical conditioning experiments with dogs, and Walter Mischel's Marshmallow Test on delayed gratification. These studies reshaped our understanding of human behavior and decision-making.
A cognitive bias is a systematic pattern of deviation from rational judgment. These mental shortcuts — called heuristics — help the brain process information quickly but can lead to errors in thinking. Common examples include confirmation bias (favoring information that supports existing beliefs), anchoring bias (relying too heavily on the first piece of information encountered), and the halo effect (letting one positive trait influence overall judgment).
Last updated: March 2026