Hello!
I'm Hank Green, and this week on SciShow News, we're talking about you, or at least about
us.
Humans, and some of the weird things our brains do: how we're bad at judging people, bad at
studying, and that video games might actually be good for kids - in moderation of course.
[Intro]
Let's start out with our complete inability to stop basing our opinion of people on the
way that they look.
This prejudice isn't always something that's learned, and it's something very hard to fight
against, with our brains making snap judgments about people in, apparently, 33 milliseconds
after seeing a face.
That's faster than it takes us to even be aware that we have been shown a face.
This, according to a study from NYU's Jonathan Freeman who says that the results are, quote,
"consistent with an extensive body of research suggesting that we form spontaneous judgments
of other people that can be largely outside awareness".
The study focused on the perception of trustworthiness and the roll of the amygdala, a part of the
brain important in decision-making and emotional reactions.
They monitored activity in the amygdala while showing subjects a range of faces, some of
them with high cheekbones and eyebrows, which people judge as trustworthy, and others with
low, furrowed brows and low cheekbones which have been rated by a large body of research
as untrustworthy.
Some of the faces were real people; others were computer generated.
The amygdala of the test subjects responded the same whether the subject were allowed
to perceive the image for a prolonged period of time, or for mere milliseconds - too quick
to even be consciously perceived.
So, yeah, when we say that humans make "flash judgments" we're not being hyperbolic.
And if you're wondering, there is no evidence that people who look untrustworthy or trustworthy
actually are.
So yeah, we're just bad at that.
What else are you bad at?
Studying, probably.
If you want to get better at it, you might just have to think about it differently.
According to research from Washington University in St. Louis, people learn significantly more
effectively when they're told to prepare to teach someone the material than if they're
just told that they'll be tested on the material, even when they're given the same amount of
time with the material.
This suggests that when digesting material, thinking about how you will present it to
another person is a better framework than thinking about how you're going to store it
in your own brain.
This is especially important for getting the main points of the material.
Testing on details showed less difference between those expecting to teach versus those
expecting to test.
On main points, however, learners expecting to teach scored 25 to 50 percent higher.
So, apparently, if you want to learn, just think about how to teach.
And finally, video games are good for kids!
And by extension, let's just assume, for everyone and just, like, stop watching SciShow and
go play Minecraft.
That's what I'm going to do, 'cause...
According to a new study in the journal Pediatrics, which surveyed a large group of ten to fifteen-year-old
children on their time spent gaming and their level of psycho-social adjustment: children
who spent more than 3 hours per day playing video games were found to rank lower in life
satisfaction, pro-social behavior, and dealing with problems than all other groups, while
those who gamed for less than an hour a day were found to have the highest rankings of
all the groups, including those who didn't game at all.
It's worth remembering, of course, that none of the differences here were gigantic.
The variance between all of the sets was only 1.6 percent.
Also, it isn't necessarily the video games causing the difference.
It seems possible, for example, that kids who have access to video games but have the
self control or family structures necessary to limit play might be more likely to be psycho-socially
well adjusted.
Thanks for watching this psychology-based episode of SciShow News.
Over on SciShow Space this week we'll be talking about the end of a space probe's ten year
journey to rendezvous and orbit with a comet, and some surprising observation of Jupiter's
moon, Io, and our moon... the Moon.
This episode of SciShow was created with the support of Audible.com, which has over 150,000
titles you can listen to with your mind while learning about your mind, including classic
works by Jung, Kinsey, and Freud.
But also newer works like "Stumbling on Happiness" from Harvard psychologist, Daniel Gilbert
- a clear picture of how utterly awful our brains are at figuring out what's going to
make us happy.
If you want to claim your first free audiobook, go to audible.com/SciShow.
We're always happy to bring the news to you, and if you want to keep up to date on what's
been going on in your mind and your body and you solar system, just go to youtube.com/SciShow
and subscribe.