Behavioral Experiment Worksheet
Turn an anxious belief into a testable prediction, run a real-world experiment, and let the result update your thinking more powerfully than logic alone ever can.
About this tool
A behavioral experiment is one of the most powerful tools in cognitive behavioral therapy because it changes belief through experience rather than argument. You can often talk yourself part of the way out of an anxious thought, but the conviction tends to return. Running a real test in the world gives your brain direct evidence, which is far more convincing than reasoning on paper.
The method is borrowed from science. You take a belief such as 'if I speak up in the meeting, people will think I'm stupid,' turn it into a specific, measurable prediction, then design an experiment to see whether the prediction holds. You note what you expect to happen and how strongly you believe it, run the experiment, and record what actually occurred. Most of the time the feared outcome is milder or rarer than predicted, and that gap is where learning happens.
Good experiments are specific and safe. Choose a prediction you can actually check, keep the first one small, and drop safety behaviors that would muddy the result, like over-rehearsing or only half-trying. The goal is not to prove yourself wrong but to gather honest data, then write down clearly what you learned so the new belief sticks.
Behavioral experiments pair naturally with thought records. A thought record helps you identify the belief and weigh existing evidence; a behavioral experiment generates fresh evidence in the real world. Used together over time, they steadily loosen the grip of anxious predictions that have never actually been tested.
- Bennett-Levy J, et al. Oxford Guide to Behavioural Experiments in Cognitive Therapy. Oxford University Press; 2004.
- Beck JS. Cognitive Behavior Therapy: Basics and Beyond. 2nd ed. Guilford Press; 2011.
Behavioral Experiment Worksheet FAQ
What is a behavioral experiment in CBT?
It is a planned, real-world test of an anxious or unhelpful belief. You turn the belief into a prediction, design a safe way to check it, then compare what actually happens to what you expected. The result updates the belief through direct experience.
How is this different from a thought record?
A thought record weighs the evidence you already have for a thought. A behavioral experiment creates new evidence by testing the thought in the real world, which is often more convincing than reasoning alone.
What if my prediction comes true?
That still gives you useful data. Most feared outcomes are milder or more manageable than expected, and even a confirmed prediction shows you can cope. Treat every result as information, not a verdict on you.
Is my information saved?
No. Everything stays in your browser. Your entries are never uploaded or stored, and the PDF is generated on your own device.