'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 -
Tetraplegics Dominate Avatar Races
Well, just speaking brain-to-computer...
IBM's Grain Of Sand Computer
'Our ancestors... thought to make the very sand beneath their feet intelligent...' - Stanislaw Lem, 1965.
Can An Entire Brain Be Simulated In A Computer?
'The miles of relays and photocells had given way to the spongy globe of platinum iridium about the size of the human brain.' - Isaac Asimov, 1941.
Illustris: The Next Generation Of Universe Simulation
'This digital device was ... 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.
Ontario Starts Guaranteed Minimum Income
'Earned by just being born.'
Is There Life In Outer Space? Will We Recognize It?
'The antennae of the Life Detector atop the OP swept back and forth...'
Space Traumapod For Surgery In Spacecraft
' It was a ... coffin, form-fitted to Nessus himself...'
Tesla Augmented Reality Hypercard
'The hypercard is an avatar of sorts.'
A Space Ship On My Back
''Darn clever, these suits,' he murmured.'
Biomind AI Doctor Mops Floor With Human Doctors
'My aim was just not to lose by too much.' - Human Physician participant.
Fuli Bad Dog Robot Is 'Auspicious Raccoon Dog' Bot
Bad dog, Fuli. Bad dog.
Las Vegas Humans Ready To Strike Over Robots
'A worker replaced by a nubot... had to be compensated.'
You'll Regrow That Limb, One Day
'... forcing the energy transfer which allowed him to regrow his lost fingers.'
Elon Musk Seeks To Create 1941 Heinlein Speedster
'The car surged and lifted, clearing its top by a negligible margin.'
Somnox Sleep Robot - Your Sleepytime Cuddlebot
Science fiction authors are serious about sleep, too.
Real-Life Macau or Ghost In The Shell
Art imitates life imitates art.
Has Climate Change Already Been Solved By Aliens?
'I had explained," said Nessus, "that our civilisation was dying in its own waste heat.'
First 3D Printed Human Corneas From Stem Cells
Just what we need! Lots of spare parts.
VirtualHome: Teaching Robots To Do Chores Around The House
'Just what did I want Flexible Frank to do? - any work a human being does around a house.'
Messaging Extraterrestrial Intelligence (METI) Workshop
SF writers have thought about this since the 19th century.
More SF in the News Stories
More Beyond Technovelgy science news stories