Are thinking caps going to become a reality?
April 6, 2012
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Richard Chi and Allan Snyder of the University of Sydney have used external brain stimulation to induce people to solve the notoriously hard 9 dots problem.
Here is the problem: Put your pen down on one of the dots. “The goal of the puzzle is to link all 9 dots using four straight lines or fewer, without lifting the pen and without tracing the same line more than once.”
If you can’t solve this problem, maybe you need an electrical thinking cap, so read the paper to see what that might entail.