'Schizophrenic' Computer Aids Researchers
A neural net computer was afflicted with 'schizophrenia' to help researchers understand more about what happens in the human brain. The results of the study support a hypothesis known as "hyperlearning", which suggests that people who suffer from schizophrenia are unable to forget or ignore as much as people normally would.
"The hypothesis is that dopamine encodes the importance-the salience-of experience," says Uli Grasemann, a graduate student in the Department of Computer Science at The University of Texas at Austin. "When there's too much dopamine, it leads to exaggerated salience, and the brain ends up learning from things that it shouldn't be learning from."
The neural network used by Grasemann and his adviser, Professor Risto Miikkulainen, is called DISCERN. Designed by Miikkulainen, DISCERN is able to learn natural language. In this study it was used to simulate what happens to language as the result of eight different types of neurological dysfunction.
In order to model the process, grad student Uli Grasemann and Professor Risto Miikkulainen began by teaching a series of simple stories to DISCERN. The stories were assimilated into DISCERN's memory in much the way the human brain stores information-not as distinct units, but as statistical relationships of words, sentences, scripts and stories.
"With neural networks, you basically train them by showing them examples, over and over and over again," says Grasemann.
In order to model hyperlearning, Grasemann and Miikkulainen ran the system through its paces again, but with one key parameter altered. They simulated an excessive release of dopamine by increasing the system's learning rate-essentially telling it to stop forgetting so much.
After being re-trained with the elevated learning rate, DISCERN began putting itself at the center of fantastical, delusional stories that incorporated elements from other stories it had been told to recall. In one answer, for instance, DISCERN claimed responsibility for a terrorist bombing.
One of my favorite sf stories of the 1970's is Home is the Hangman, by Roger Zelazny. In the story, a robot (the Hangman) with a "learning brain" is trained using a telefactoring connection with each of several researchers. In the process of imparting lessons on how to move around and manipulate objects, the connection also passes some measure of the feeling and emotions of the researchers.
As a prank, the researchers use the Hangman to break into a bank. Unfortunately, a human guard is killed; the Hangman feels the guilt and horror of the researchers and has what amounts to a 'psychotic break'.
Perhaps readers can recall other stories about computers gone mad.
Via Science Daily.
Scroll down for more stories in the same category. (Story submitted 5/11/2011)
Follow this kind of news @Technovelgy.
| Email | RSS | Blog It | Stumble | del.icio.us | Digg | Reddit |
you like to contribute a story tip?
Get the URL of the story, and the related sf author, and add
Comment/Join discussion ( 2 )
Related News Stories -
Eterni.me - To Skype With The Dead
'Nothing... left of Jeserac but a galaxy of electrons frozen in the heart of a crystal.'- Arthur C. Clarke, 1956.
Razer Project Valerie Laptop Unfurls
'A paper thin polycarbon screen unfurled silently...' - William Gibson, 1986.
Google Home Continues Implementation Of Pohl's Joymaker
'It is a transponder connecting you with the central computing facilities of the city in which you reside on a shared-time, self-programming basis.' - Frederik Pohl, 1966.
New Startup 'Improbable' To Model Our World
'A machine able literally to contain the Universe Itself...' - Stanislaw Lem, 1965.
Technovelgy (that's tech-novel-gee!)
is devoted to the creative science inventions and ideas of sf authors. Look for
the Invention Category that interests
you, the Glossary, the Invention
Timeline, or see what's New.
PassivDom 3D Printed House - What If You Could Live Anywhere?
'The houses are prefabricated units...'
Breakthrough In Manufacture Of Red Blood Cells
This blood's for you!
Caihong Solar-Powered Drone 'Atmospheric Satellite'
'... placed in the wings of a plane to generate power from the light falling on that surface.'
NASA Wants Low Earth Orbit Wifi
'This was the center of Interplanetary Communications.'
Is Genetic Testing At Businesses A Bad Idea?
It's not a topic that fares well in science fiction movies-
Wearable Smart Jacket
He pressed the button in his sleeve communicator and snapped: 'Action stations!'
Store One Bit On One Atom
'...each individual molecule has a meaning.'
Fluorescent Bacteria Fashion
'The racks of gowns itched and quivered, their colors running into blurred pools.'
Keith Laumer's Bolo Autonomous Tanks Right On Schedule
'I cannot lie idle under attack.'
When Computers Develop Their Own Language, Will They Talk To Us?
'The curious absent look of a robot talking on the TBR circuits - the Talk Between Robots radio...'
LipNet Reads Lips - Until Disconnected, That Is
'We'd have to cut his higher brain functions... I'm not sure what [HAL} would think about that.'
Eterni.me - To Skype With The Dead
'Nothing... left of Jeserac but a galaxy of electrons frozen in the heart of a crystal.'
Wearable MRI Is Former Occulus/Facebook Exec's New Project
'Your cephalochromoscope... that you always turn on and play when you get home...'
Ford Stratasys Infinte Build 3D Printer
'He proudly indicated his Buick... Almost as good as the original it was printed from...'
The Space Suit As Personal Spaceship
'Darn clever, these suits...'
Dune Fans! Your God Emperor Is Ready
'If one held a sandtrout in the hand, smoothing it over your skin, it formed a living glove.'
More SF in the News Stories
More Beyond Technovelgy science news stories