UUCF Summer RE 2011 Brain Glitches Session 7: Memory and Attention.

UUCF Summer RE 2011

Brain Glitches

Session 7: Memory and Attention

Memory

I’m going to read you a list of words.

Remember them, I’m going to come back to this later.

Awareness Test

How good do you think your brain is at following what is going on in a complicated environment?

http://www.youtube.com/watch?v=47LCLoidJh4

Inattentional BlindnessWe don’t see what we’re not looking for.Magicians use this all the time. If they keep

your attention focused elsewhere, you miss what is happening right in front of you.

This is also a big factor in traffic accidents, and why you should never drive while talking on a cell phone.

The more your attention is focused on something else, the less likely you are to notice the other car. Or the bike. Or the kid running into the street.

Surprisingly, studies show that a hands-free phone doesnot distract you less. It’s theconversation that’s distracting you, not the fact that youare holding a phone.

We’re just limited

There’s only so much that our brain can pay attention to at once, and we tune out the rest.

Silencing Effect:http://www.youtube.com/watch?

v=IjMVsTFVX10&feature=BFa&list=FLBOn9CwLdKE7WnyQscv19bA&lf=BFp

Change blindness

Related to inattentional blindness. Things that we are supposedly paying attention to can change, and we don’t notice.

Richard Wiseman: http://www.youtube.com/watch?v=voAntzB7EwE&feature=BFp&list=FLBOn9CwLdKE7WnyQscv19bA

And more:

Derren Brown: http://www.youtube.com/watch?v=vBPG_OBgTWg

Murder Mystery: http://www.youtube.com/watch?v=BPKN7yXCNWs&list=FLBOn9CwLdKE7WnyQscv19bA&index=4

Most people take a long time to see it. But once you see it, you can’t go back to “not seeing it”.

Something is changing between these two pictures

What is happening there also goes back to “pattern recognition” that we talked about earlier this summer. Once you have seen what is changing, you can’t “unsee it”. Once we’ve picked up a pattern, then our brain locks in on it. You probably can’t “unsee” the moonwalking bear now either.

Back to Memory

We are going to talk about a couple of kinds of memory glitches.

Short-term working memory – You can’t hold as many things in your mind at once as you probably think you can.

Long-term memory – Your memories of things that happened in the past are not as accurate as you think.

Remember that list of words I asked you to remember?

Now take a blank sheet of paper, and write down as many of them as you can.

No helping each other, please.

How many did you get?

Was the word “snooze” on the list? How about “apple”?

Sleep?

House?

Dream?

Here’s the list

Bed, rest, awake, tired, dream, wake, snooze, (earthquake), blanket, doze, slumber, snore, nap, peace, yawn, drowsy.

Our RAM is smaller than we think

Our short-term working memory can only hold a limited number of pieces of information at a time. Researchers have determined that this number is about seven, plus or minus two.

Let’s try this out. I’ll read you some random numbers, and you say them back to me:

3 Digit: 970  184  760  742  137  113   995 376 849 963 938   391  654  070 697

4 digit: 7523 9958 0518 5506   0530   2532   1964   0960 6829 8526 6834 2889 9844   8388   9395

5 digit: 03476 60087 90253 52869 65023 02003 17620 97326 58209 49001 50069 46864 56478 27638 14157 28043 86385 37915 09884 40860

6 digit: 475864 230193 232784 756170 920435 162060 702763 080655 681400 144743 489136 721535 493182 443820 326325 678809 621358 059292 745488 952479

7 Digit: 4286805 9174307 9200218 4434070 6076721 8492976 3900003 7678920 3686376 8319800 1763737 6743511 1804188 3966365 2791419 6316258 3085948 7465294 4327256 6397161

8 digit: 45722656 14342284 35041328 46386276 38909344 61340140 94047752 95924912 37177592 39977480 58135740 03660953 67085320 23696374 53863208

9 digit: 480692512 576824512 288428544 153616368 292473664 875901760 125617504 110891048 420649632 491373824 544780480 384560512 865220416 157661504 014759064

10 digit: 2636035974 8057693653 0753965881 9085389380 2035627429 3276916747 6481394057 7976749196 1435218884 5840413284 2208848791 4212309011 3490683781 8404036378 5280576967

An interesting side effectA study was done where the subjects were given a

number to remember, then sent down a hall to another room to complete the study.

Along that hall was a refreshment table offering a choice of healthy fruit salad or a big slice of chocolate cake. This table was the real point of the study.

One group of students was given a two digit number to remember. The other group was given a seven digit number.

The students with the seven digit number were nearly twice as likely to choose cake as those with only a two digit number.

What’s going on here?

The researchers think that making the choice for the healthier option required some thought. And the people trying to remember a seven digit number? Their brains were already too busy with remembering the longer number, and so they just went for want they wanted.

Cake!

Long-Term memory

People like to think of their memory like a video camera – capturing a true representation of events and storing them perfectly forever.

NOPE!

Hillary Clinton in 2008

“I certainly do remember that trip to Bosnia... we came in in an evasive maneuver... I remember landing under sniper fire... there was no greeting ceremony... we ran with our heads down, we basically were told to run to our cars... there was supposed to be some kind of a greeting ceremony at the airport, we basically were told to run to our cars, that is what happened.”

Here’s the video of that event: http://www.youtube.com/watch?v=piZqaUfNs8g

People forget things that happened.

AND – they insert details that didn’t happen, and remember events that didn’t happen.

What researchers are finding is that each time we remember something, our remembering it becomes a part of that memory. It’s like we “save over” our old memory file with a new version each time.

False Memories

Remember that time when you were a kid and you took that great hot-air balloon ride? No?

Researchers can implant false memories

Wade, Garry, Read and Lindsay (2002) used faked images of a hot air balloon ride to convince people they had experienced such an event as a child. Over three interviews they asked people to recall as much detail as possible about four photographs from their 'childhood' (three real, one faked) that had been supplied by a family member. When a person failed to recall any information about an event, typically the balloon ride, the researchers reassured to participant that it was quite common to have difficulty remembering things from so long ago but to keep trying. The experimenters also asked them to visualize the event, such as what the basket felt like, how the ground looked, etc. By the third interview approximately 50% of the participants could 'remember' having a hot air balloon ride as a child, even though none of them had ever had such an experience.

Other studiesLost in a shopping mall:http://www.youtube.com/watch?v=Q8xPfJ8cPhs&feature=player_embedded#

In a similar study, 25% of people were eventually convinced that they remembered spilling punch on the parents of a bride at a wedding as a child.

Another study - fully 30 percent of people shown a fake print ad of Bugs Bunny in front of Disneyland recalled shaking his hand when they visited there.

Researchers use misleading images, suggestion and leading questions to get people to remember things that didn’t happen.

More people believe the false memories when they are discussed over several sessions.

People also embellish, add to, and change their own memories all the time, as in the Hillary Clinton example we saw.

How much can we rely on eyewitnesses?

Do you swear to tell the truth, the whole truth, or whatever it is you think you remember?

How about “retrieving repressed memories”?

It’s been claimed that people can remember abuse from their childhood under hypnosis. Family members have gone to prison because of “memories” retrieved like this.

Understanding what we have just talked about, should that kind of testimony be enough to convict someone?

SO…

• We often miss what is right in front of us• We don’t always notice when things change• We can’t pay attention to very many things at

a time• Our long-term memory doesn’t store things

perfectly• Our memories can be messed with.