The 4 experimental scans were done at the start of certain problem blocks:
- EXPT1 - beginning of Block 1
- EXPT4 - beginning of Block 4
- EXPT7 - beginning of Block 7
- EXPT10 - beginning of Block 10

The participants were instructed to start solving the problem 10 seconds before the tracer was injected. Although the PET scans only lasted 60 seconds, the participants had to complete the entire block of 9 problems.

University of California, Davis

Although participants were scanned 11 times over the course of the session, only 6 PET scans were used in the analysis:
- 4 experimental scans
- 2 control scans

Imaging Procedures of the TOL task

Beauchamp, M., Dagher, A., Aston, J., & Doyon, J. (2003). Dynamic functional changes associated with cognitive skill learning of an adapted version of the Tower of London task. NeuroImage, 20(3), 1649-1660. doi:10.1016/j.neuroimage.2003.07.003

Dynamic functional changes associated with cognitive skill learning of an adapted version of the Tower of London task

Imaging Procedures: Experimental Scans (TOL task)

2 control scans were taken over the entire testing session:
- CTRL1 - at the start of the testing session
- CTRL2 - at the end of the testing session

In the control session, participants solved up to 16 one-move problems.

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