1. http://faculty.washington.edu/chudler/java/reacttime.html
2. http://faculty.washington.edu/chudler/java/stopl.html
3. http://faculty.washington.edu/chudler/java/dottime.html
4. http://faculty.washington.edu/chudler/java/backtime.html
5. http://faculty.washington.edu/chudler/java/boxes.html
6. http://faculty.washington.edu/chudler/puzmatch.html
7. http://faculty.washington.edu/chudler/stm0.html