That is lesson 2 done.
Sleep is one of the few things that cannot be achieved by trying, and trying is what you have been doing.
Anything you wrote in this lesson is in your notebook, on this device only.
Where this lesson comes from
- Harvey AG (2002). A cognitive model of insomnia. Behaviour Research and Therapy, 40(8), 869 to 893. Spielman's three factor model and Borbely's two process model are described in the lessons without being cited to a specific paper.