Basics

How do we test an idea?

Follow a prediction through a fair comparison, measurement and revision.

Five connected stages show a fictional comparison of restudy and recall practice.
View full screenDownload the infographic

The picture in words

Question
Begin with something you want to explain.
Prediction
State the outcome your explanation leads you to expect.
Fair comparison
Assign conditions by chance and keep the final recall task the same.
Measure
Collect and compare the answers.
Revise
Use the result to refine the explanation and the next question.

Reading the illustration

The learning example is an original teaching scenario. The loop shows how observations can lead to a revised question.

Try a question

What would you keep the same when comparing the two ways of studying?

Show the explanation

Use the same material, total practice time and final recall task. A clear comparison makes it easier to interpret a difference in the outcome.

Read the sources

Keep exploring

Image viewer

100%

Loading image…