What the Brain Looks Like When It Solves a Math Problem
nytimes.com
nytimes.com
What would be really cool though is if we could see more details about whar happens in the second phase. When does the correct solutino "click" into place? What happens before (are many hypotheses begin explored in parallel (BFS-like), or does the brain follow one track at a time (DFS-like)...
Also interesting would be to quantify the metabolic cost (in watts) for different types of problems. Does "thinking hard" really require more energy or is it an illusion?
The results themselves are not particularly new; he has been working on similar studies for years:
http://act-r.psy.cmu.edu/wordpress/wp-content/uploads/2013/1...
How do you go about multiplying two matrices? Different people do it differently. It can be easy or hard depending on how you do it..
When you multiply, do you write your matrices in such a way that the bottom left corner of your second matrix sits near the upper right corner of the first matrix? (i.e: b31 is above and slightly to the right of a13)
Here's what I mean:
https://upload.wikimedia.org/wikipedia/commons/e/eb/Matrix_m...
If the resulting matrix is R with elements rij, then r12 (yellow and red) is equal to a11.b12 + a12.b22.
You can multiply matrices really fast just by popping the second one into that position. It avoids clutter and confusion. You'll probably never make mistakes again.
For example, your brain (and dog brains!) handle some tasks like catching a ball while running/jumping, perceiving depth, and responding to a name which are very computationally expensive.
If you programmed a robot to do any of those things, you'd be multiplying matrices and doing FFT's everywhere. Somehow our brain does the same thing, but we don't have any means to observe the internal computations required to accomplish the tasks.
I'd also argue that general purpose computing capacity is a very rare thing in the animal kingdom because in most cases only enough capacity is needed to glue the specialized parts together.