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Out of Sight, Out of Mind

PerlJedi writes "Researchers at the University of Notre Dame have conducted a very simple study, with some surprising (or at least amusing) results about how our short term memory works. Quoting: 'Sometimes, to get to the next object the participant simply walked across the room. Other times, they had to walk the same distance, but through a door into a new room. From time to time, the researchers gave them a pop quiz, asking which object was currently in their backpack. The quiz was timed so that when they walked through a doorway, they were tested right afterwards. As the title said, walking through doorways caused forgetting: Their responses were both slower and less accurate when they'd walked through a doorway into a new room than when they'd walked the same distance within the same room.'"

33 of 147 comments (clear)

  1. Open the Door Jeopardy by eldavojohn · · Score: 5, Funny

    Alex Trebek: Good evening and welcome to another edition of "Open the Door Jeopardy" where contestants must step through a door after ringing in and answer because answering a 'clue' in the form of a question just isn't confusing enough. Ken Jennings, as our returning champion you start.
    Ken Jennings: I'll start with the category 'I Confess!' for $400, Alex.
    Alex Trebek: Very good ... 'His death and subsequent disagreement of heir resulted in the Battle of Hastings.'
    *Ken Jennings rings in, opens the door and steps through it*
    Ken Jennings: Um ... uh ... um ... I knew it a second ago.
    Alex Trebek: Ooooh, I'm sorry, time is up. Anyone else?
    *the heavy treads of IBM's Watson machine crush the door as it rolls in*
    Watson: Who was Edward the Confessor?

    --
    My work here is dung.
  2. It's quantum-mechanical by ClickOnThis · · Score: 4, Funny

    Obviously the subjects' brainwaves diffracted when they walked through the door...

    --
    If it weren't for deadlines, nothing would be late.
    1. Re:It's quantum-mechanical by JonySuede · · Score: 3, Insightful

      don't you need two doors for that ?

      --
      Jehovah be praised, Oracle was not selected
    2. Re:It's quantum-mechanical by ClickOnThis · · Score: 4, Informative

      don't you need two doors for that ?

      No.

      --
      If it weren't for deadlines, nothing would be late.
  3. Life Imitates Art, or vice versa? by RobinEggs · · Score: 5, Interesting

    So many famous quotes talk about the gravity of "walking through that door", about the hope of "opening a new door" or "closing a door...opening a window" that I wonder how much people associate doors metaphorically with permission to forget and ignore everything on the other side?

    Of course, ancient Greeks used architecture, specifically an image of a large house, to remember things: a common technique to plan and memorize a speech was to lay it out visually in your head, each room representing a major topic and each door perhaps representing a transition or gravid point. So architecture as memory cuts both ways.

    1. Re:Life Imitates Art, or vice versa? by burleywinz · · Score: 4, Funny

      I did not know this and will try this technique the next time I have to give a speech. Are you supposed to start in the basement or the attic? Probably doesn't matter. I just hope I don't fall down the stairs.

  4. Context-switching matters by Caerdwyn · · Score: 5, Insightful

    Switching contexts is computationally expensive for our brains, and is a lossy procedure. Any techie can tell you that constant interruptions cause bad code because you lose context and the "gestalt" of what you are doing.

    It's one of the reasons why I've always insisted upon having at least one guaranteed-uninterrupted (nothing short of "the building's on fire... again") two-hour block of time per day in any tech job I have. If I don't have that, don't complain to me that I write bad code, but DO expect me to gripe about it in my status and my supervisor evaluation.

    #!/usr/bin/env python
    import os, sys, time, re, LeaveMeTheFuckAlone

    --
    Everybody gets what the majority deserves.
    1. Re:Context-switching matters by pclminion · · Score: 4, Interesting

      Switching contexts is computationally expensive for our brains, and is a lossy procedure. Any techie can tell you that constant interruptions cause bad code because you lose context and the "gestalt" of what you are doing.

      While that is true, it does nothing to diminish the weirdness of this result. Walking from one place to another doesn't seem like much of a "change of context." Especially when your present location has utterly nothing to do with what you're trying to remember.

    2. Re:Context-switching matters by Baloroth · · Score: 3, Insightful

      Oh hell yeah. Is the door pull or push? Can I lift the handle, or do I have to push it down?

      And don't even get me started on automatic doors. You need differential calculus to walk through them properly: is the door going to be wide enough open for me to get through it at my present speed, given a low threshold of detection, or am I going to pull a Bieber and smash my face into it?

      --
      "None can love freedom heartily, but good men; the rest love not freedom, but license." --John Milton
    3. Re:Context-switching matters by eulernet · · Score: 3, Interesting

      Switching contexts is computationally expensive for our brains, and is a lossy procedure. Any techie can tell you that constant interruptions cause bad code because you lose context and the "gestalt" of what you are doing.

      In fact, it's a little more subtle than that.
      What is expensive is not switching contexts, as you can check by reading 2 web pages simultaneously, it's pretty easy.

      But your performance degrades a lot when you try to multitask with your two cerebral hemispheres (for example computing and drawing at the same time).

      Also, when you have similar tasks, you have an internal limit, and you can easily store tasks that fit within your limit.
      When a task is closed, you'll forget it immediately, to free space for an incoming task.

      My own limit is around 3.

      This is called Zeigarnik effect:
      http://en.wikipedia.org/wiki/Suspense#Zeigarnik_effect

    4. Re:Context-switching matters by idontgno · · Score: 5, Informative

      Apparently (parsing TFA's explanation), yeah, it is.

      When you walk into a new scene, your brain performs a series of high-priority tasks to update your current situational map. It would be counter to your survival success to ignore new sensory and context information presented by rounding a corner or entering a cave, especially if that sensory information included such things a predators. Even if what you were pondering as you entered the new scene was, for instance, a very innovative way to knap and flake a stone axe that would really impress the Cro-Magnon chicks. Your pre-historic geek-trance will kill you if you wander all unawares into a cave bear den.

      As a high-priority background task, this situational integration would preempt cognitive resources, such as forcing a cache dump of short-term memory to populate with new page tables, as it were.

      Well, that's my interpretation. Sorry it's not a car analogy or a pizza analogy.

      --
      Welcome to the Panopticon. Used to be a prison, now it's your home.
  5. Meetings by sunderland56 · · Score: 4, Funny

    This is why I hate going to meetings and feeling stupid. Come to my cube and I'll know the answers.

  6. I would think by Anonymous Coward · · Score: 5, Insightful

    I would think this is due to the brain first checking the next room. It being a new place, we probably want to be well aware of the room before being too far in. Thus our attention is taken away from whatever we are thinking about a minute ago.

  7. Re:Or maybe by hedwards · · Score: 3, Insightful

    Short term memory is based on neurophysiology of the brain. That's not going to change that much over just a couple decades. Now, the amount of stress that we feel as a result of constantly paging between things would elicit that sort of response. And it's been studied, not conclusively yet, but multitasking is bad.

  8. Doorway or .. by ackthpt · · Score: 3, Interesting

    Changing mental focus causes forgetting. Can you multi-thread?

    Walking across room: : Command: Get blue pencil trudge trudge trudge See: pencils Take: blue one. w00t!

    Walking across room, through door: : Command: Get green string trudge trudge trudge See: Door Look for: Knob Act: Turn knob Act: Push door Door does not open. Act: Pull door Door opens trudge trudge trudge Halt. Query: What am I in here for? Pencil? Chair? Left-handed widget extractor? Rope? Hook? Trebuchet? Keys? Potrzebie? Fail!

    I frequently find distraction breaks my thread of thought and I lose the frayed thread end. Rather like going up stairs - "Uh. What did I come up here for?" Go downstairs - "Uh. What did I come down here for?" I've been doing this ever since I spent 20 minutes searching my parents house for the screwdriver I was holding in my hand all the time - I was about 12 years old at the time - I'm an expert in this field!

    --

    A feeling of having made the same mistake before: Deja Foobar
  9. Survival mechanism by HangingChad · · Score: 4, Interesting

    As the title said, walking through doorways caused forgetting

    I could see how that would be a survival instinct. When you cross a barrier into another space, job one for your brain is taking stock of where you are and processing possible threats. It's not that you forget what you have in your hand, your brain has merely busy with another set of priorities.

    When our ancestors moved from the cover of the woods to a grassy meadow, when they entered a cave, or rounded the bend of a river they were effectively going through a door to another space. The surviving human brains would have been attuned to both threats and opportunities, which would be a priority processing task kicked off by crossing the barrier threshold.

    --
    That's our life, the big wheel of shit. - The Fat Man, Blue Tango Salvage
  10. This has happened to me many times... by mark-t · · Score: 3, Interesting

    ... And I find that at least half the time, I can mentally retrieve whatever it was I was thinking of by going to the last spot I was in where I am certain I remembered it or was thinking about it, and then physically going through the motions of whatever it was that I was doing there last time, be it sitting down, walking in a particular direction, or what have you.

    It's a very weird phenomenon... like deja-vu in reverse.

  11. Re:Different conclusion. by ackthpt · · Score: 4, Interesting

    Doesn't seem like it's doorways or line of sight, but changing rooms is like turning a new page in ones mind. New room, new collection of objects, new page of memory to work with.

    That's how I feel it works in my own mind in any case.

    Hundreds of processes happen, going from one room to another. Identifying the door is a good start (walls are so unyielding) looking for the knob, using hand-eye coordination to put hand on doorknob, turn, sense door opens or does not, pulling, pushing, how far is door open, don't hit it going through, see objects in new room, processes information (I didn't walk out into space and plummet like Wile E. Coyote, etc.) then resume walking, assuming you know what you came in for.

    Probably at some point they'll use this as a screen for Alzheimers Disease (or early onset dementia.)

    --

    A feeling of having made the same mistake before: Deja Foobar
  12. Standard Experimental Procedure by martin-boundary · · Score: 4, Funny
    Experimenter: Please walk this way.

    Subject: I think that door just sighed.

    Experimenter: Ghastly, isn't it? All the doors on this experiment have been programmed to have a cheery and sunny disposition. Now, how many objects in your backpack?

    Subject: Uh, really? That's, uh ... I'm sorry, what? Ah, I forget... what?

    Experimenter: *scribbles on clibpoard*

  13. Dance Steps by jamvger · · Score: 5, Interesting

    It is well known that when learning a new dance step, it is much easier to keep the room in the same orientation when rehearsing it. One gets particularly confused trying the step facing another direction before the step begins to be committed to muscle memory. Dancers call it "room memory".

  14. Take advantage of the effect by davide+marney · · Score: 3, Interesting

    After you have some unpleasant experience -- break up with your girlfriend, argument with your boss -- just walk into another room and start doing something else

    --
    "We receive as friendly that which agrees with, we resist with dislike that which opposes us" - Faraday
  15. Re:Common Knowledge by ozmanjusri · · Score: 5, Funny

    So those WERE the droids I was looking for?

    --
    "I've got more toys than Teruhisa Kitahara."
  16. Re:Or maybe by treeves · · Score: 4, Funny

    He would but he just walked through the door from the bathroom and has forgotten them.

    --
    ...the future crusty old bastards are already drinking the Kool-Aid.
  17. Re:Different conclusion. by bistromath007 · · Score: 4, Funny

    Dammit, now I forgot what I came to this website for.

  18. Re:Different conclusion. by Quirkz · · Score: 4, Insightful

    I'd argue that taking stock of the new room is the biggest of those distractors. There's a lot involved when you have to take stock of "new" territory, and it'd be pretty easy for that to distract you. Even if you're familiar with the room, it takes a moment to verify things are as you left them. We're not all that far removed from needing to figure out if there's something waiting to eat us around every corner.

  19. Re:Different conclusion. by _0xd0ad · · Score: 3, Informative

    Yes, it's pretty obvious really. It's a context switch.

  20. Re:Different conclusion. by swalve · · Score: 4, Interesting

    Context is king in memory. It both helps and hinders. Memories are linked to the place and time where you first learned them. The brain is like a 3 dimensional chording keyboard combined with a hologram combined with photographic film. If you've only seen something once, you'll remember the context. As you see that thing more and more, the context/background gets washed out and all that remains is the pattern of the image/concept. So if you are told to remember the words "fish, piano, disestablishmentarianism, Arizona, and tooth", you are going to tie that pattern to the context you are in. Change the context and it becomes harder to remember.

    I wonder if it's cheating to "play back" your conversation with the person who gave you the list?

  21. In the first place... by dpbsmith · · Score: 5, Informative

    In the first place, this has been known since the time of the ancient Greeks, in the form of the memorization technique known as the "method of loci." Rhetoricians memorized their speeches by associating each part of the speech with a room in their house, and as they gave the speech would mentally walk through the house. This is in fact the source of our expressions "in the first place," "in the second place," etc.

    In the second place... uh... I forgot what I was going to say.

  22. Re:Or maybe by Xtravar · · Score: 3, Funny
    --
    Buckle your ROFL belt, we're in for some LOLs.
  23. Re:Common Knowledge by pfignaux · · Score: 5, Interesting

    Frank Lloyd Wright exploited this phenomenon in his architecture. If you're familiar with his "compression and release", you're probably also familiar with how dumbstruck a person can get walking into one of his buildings. http://goo.gl/H6ygK

  24. Re:Different conclusion. by Rockoon · · Score: 3, Interesting

    It should probably also be noted that context is very important in data compression, and it doesnt seem unreasonable that brains have evolved to store information efficiently using some of the strategies that we have found successful in compsci.

    --
    "His name was James Damore."
  25. Re:Common Knowledge by mihalisgr · · Score: 3, Insightful

    The phenomenon is that when you move through a doorway that you have some subconscious trigger to forget (you are somewhere else, no need to remember anymore)

    This, as well as the original post, are so completely false in logic that I can't even begin to describe it. Ok I will try to begin though.

    Of course, people who would be in an experiment, and would go through a door, would have different short term management than those who don't. Going through a door requires some calculations: opening it, closing it, the surprise of the environment of the next room, the risk of walking through the door (what lies beyond is somewhat random before you open the door/cross it, adjustment to the different light/temperature/humidity conditions, and many more.

    Those all don't happen consciously, but neither the short term memory is handled consciously. As a direct result, due to these factors all being way more important for the survival of the person, take high priority in the short term memory, with the direct results the test produces...

  26. Re:Common Knowledge by AK+Marc · · Score: 3, Informative

    I haven't read the study, but the details in TFA are insufficient to gauge what is meant by a door. They call it "walking through a doorway" not "operating a door" or such. So the issue is walking into a new room, not operation of a door.