Dan Thomsen authors two chapters in "Handbook of Human Computation"
SIFT Principal Researcher Dan Thomsen has two chapters in the new Handbook of Human Computation, edited by Pietro Michelucci and published by Springer in December 2013.
The first chapter "Solving Wicked Problems" discusses using crowds to solve problems so challenging people cannot even tell if a problem is solved. The second chapter "Applying Security Lessons Learned to Human Computation Solving Systems" tries to ensure this emerging field doesn't fall into the same old security pitfalls.
For more details: http://www.springer.com/computer/ai/book/978-1-4614-8805-7