Across
- 2. What the children wore of the train
- 3. The person who punches the tickets and runs the train
- 5. Santa Rides in a (blank)
- 6. The offical written plan of a clinical study
- 9. Keeping participants or researchers unaware of which treatment is being given
- 10. What you need to do to hear the bell
- 11. The Polar Express is a (blank)
- 12. The bell fell out of the boy's (blank)
Down
- 1. The process used to assign participants to different treatment groups
- 4. What is the destination of the Polar Express?
- 7. Santa's helpers at the North Pole
- 8. The main researcher or doctor in charge of running the clinical trial