I had not found the other solutions documented elsewhere prior to using them in the presentation. The 4 and 3 line solutions were documented in books. The pencil's straight line indeed can cover the entire paper. The pencil is stationary and the paper is rolled onto a cylinder, with the cylinder rolling. Other engineers do a variation of the "around the world" solution. becoming increasingly smaller until the dots seem to converge. ditto for painters Computer scientists have no problem with regular pencils, but microdots. Moms with small kids have no problem imagining a fat crayon like pencil which is fatter than the picture of all 9 dots. However, scientists working with a physical world have a box where this is "normal". Math people think dots and lines with width is "cheating". The intent of the different solutions is not just to think outside the box, but also show that there is more than one right answer, as well as to show that different people have different boxes. I presented all of the solutions stated in prior comments. The researchers say this supports their theory, concluding that brain stimulation has the potential to facilitate those tasks that our minds are not well adapted for.As an IBMer, I presented this problem multiple times for 3 separate years 2002-2005 at Disney World for engineering week. But, on further questioning, he revealed having had a head injury as a child that damaged his left temporal lobe. Intriguingly, one subject recruited by the researchers but not included in the analysis did immediately solve the puzzle without the benefit of electrical stimulation. The electrical current, however, boosts activity on the more creative right side of the brain and reduces the activity in the creativity-suppressing left side, freeing the subject from their existing cognitive biases and enabling them to see the solution. And as the solution requires drawing lines outside of this shape, subjects think "inside the box" and don't spot it. So, they had altered behaviour by electrically stimulating a particular part of the brain.According to Snyder and Chi, people find this puzzle so difficult because the dominant left temporal lobe uses prior knowledge of shapes to interpret the pattern of dots as a square with imposed rigid boundaries. A control group meanwhile, to whom the electrodes were attached but no electrical current applied, were still all unable to solve the problem. This group had ten minutes of electrical stimulation treatment, 2 milliamp current passing across their heads with the positive electrode applied to the right temple and the negative electrode on the left.įollowing this treatment, 40% of the subjects then solved the problem. These carried through the skull, and activated the nerve cells in the right side of the temple, the right prefrontal cortex. Synder and Chi then split the group and half of people were fitted with something that looked like a shower cap, and attached to the shower cap were electrodes that sent short electrical signals. How many people could solve this puzzle in 9 minutes? None! They took twenty two volunteers and gave them this 9 dot puzzle. Recently two Australian neuroscientists Synder and Chi took this information and changed the way people thought, using the power of electricity! They published the study in 2013, in the journal Neuroscience Letters. So they're very brief, rapid, changes of electrical potential that lasts for 1/1000th of a second, travelling up and down the nerve cells, which are connected to each other. How is this information encoded? The answer is that it's encoded by electronic pulses. To allow us to think and to move, these nerve cells send signals to each other. That's a lot! That means in just one small cubic millimetre of human brain tissue there are more than 1 million nerve cells (10 6) and 1 billion (10 9) connections. There are about 100 billion (10 11) nerve cells in the brain and about 1000 trillion (10 15) connections between them. If they answer this question, they can learn more about how the brain works. Scientists want to know whether you stimulate people to think outside the box and solve puzzles like this by tweaking with the activity of the brain. Investigations over the last century show that under laboratory conditions, so being watched by a researcher in a silent room, no one can solve this puzzle! This 9 dot puzzle is an example of thinking creatively. Our minds have evolved to solve certain problems effortlessly, yet we struggle to solve others that require us to 'think outside the box'. The right side of the prefrontal cortex (the bit of your brain just behind your forehead)
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