Psychological Videos

Here's an explanation: My college psychology teacher is probably the best teacher I've ever had. She shows fun videos, has the students do fun activities, and allows the students to give presentations to help the subject matter sink into their heads better. It would probably seem a little odd to see college students making paper "brain hats," but the students (especially the girls) enjoy that kind of thing more than the average person would probably think.

Anyway, the last two videos she showed us during class were TED talks. They pertained to what we were learning at the moment - namely, the mind's perception of things and attention. I enjoyed them, so I thought I'd post them on my blog in case somebody hasn't seen them yet.

Here are the videos, embedded. When given instructions, be sure to follow them carefully so you'll better understand what they're getting at:

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Dividing Paper Puzzle

When I was young, I would fold a sheet of letter paper in half, for origami projects. It occurred to me that the two halves looked almost the same as the whole sheet of paper - except they were smaller. I could see they weren't exactly the same shape; they were off by a little bit. But the idea stuck in my head. You can use a pen, instead of scissors, to halve the paper. Those rectangles all have the same shape, but are different sizes. One night when I was 12, I thought about my idea. I wondered if it was possible to have a sheet of paper that could be cut in half, resulting in 2 smaller versions of the same paper. That would be neat, to be able to cut a paper in half and get 2 papers that had the same exact shape. If that were possible, then you could cut those papers, too; and the resulting papers would have the same shape as all the other papers. You could keep cutting in half forever, and each paper, no matter how small, would have the same shape as all the others. I HAD to

Pluto No Longer on the Horizon

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Gravity

Imagine the universe is filled with water. Instead of empty space, every inch of it contains pure water. No planets, no stars, only water. What happens? And what would happen if an air bubble formed? The answer to this question requires a basic understanding of gravity. Gravity is very important. It helps hold matter together, bends light, and distorts space-time (which, incidentally, is how it bends light). It also makes it possible to play football, and as Americans are big football fans, they would certainly agree that we couldn't live without it. Unfortunately, many Americans don't understand how gravity works. Admittedly, scientists haven't figured out a lot of things, but we do understand it well enough to make predictions and model physical events. One of the important things about gravity is that its strength is proportional to the inverse of the square of the distance. In other words, it gets weaker as you get farther away, based on the equation: F = c/d 2 where c

Cosmos Computed

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