New ’100% accurate’ test diagnoses schizophrenics simply by checking their gaze
2012 11 01

From: MailOnline



Scientists have developed an almost 100 per cent accurate test to detect schizophrenics - by checking their gaze.

Impaired eye movement has long been thought to be associated with schizophrenia.

Now a new study has reported a model of testing which demonstrated 98 per cent accuracy in distinguishing between those with and without schizophrenia.

Using ’simple viewing tests’, researchers at Aberdeen University explored the ability of eye movement tests to sort schizophrenics from healthy people.

People with schizophrenia showed well-documented deficits in the ability to track slow moving objects smoothly with their eyes.

Their eye movements tended to fall behind the moving object and then catch up again using rapid eye movements called ’saccades’.

Schizophrenics also found it more difficult to maintain a steady gaze.

The study was led by Dr Philip Benson and Professor David St Clair and involved a range of eye tests where volunteers were asked to track slow moving objects slowly with their eyes (known as smooth pursuit), inspect a variety of everyday scenes (free viewing) and given instructions to keep a steady gaze on a single unmoving target (fixation tasks).

Their findings could speed up detection of the condition and they are now examining whether the tests can be used for earlier intervention in major mental illness.

Dr Benson said today: ’It has been known for over a hundred years that individuals with psychotic illnesses have a variety of eye movement abnormalities, but until our study, using a novel battery of tests, no one thought the abnormalities were sensitive enough to be used as potential clinical diagnostic biomarkers.

’In smooth pursuit, people with schizophrenia have well-documented deficits in the ability to track slow moving objects smoothly with their eyes. Their eye movements tend to fall behind the moving object and then catch up with the moving object using rapid eye movements called saccades.

’In the free-viewing test, whereas most individuals follow a typical pattern with their gaze as they scan the picture, those with schizophrenia follow an abnormal pattern and in the fixation task individuals with schizophrenia found it more difficult to maintain a steady gaze.’



This graphic shows schizophrenics and those without the condition track objects with their eyes differently.


Several methods were then used to model the data and the accuracy of each of the created algorithms was tested by using eye test data from another group of cases and controls. Combining all the data, one of the models achieved 98 per cent accuracy.

Professor St Clair added: ’We are keen to explore how best our findings can be developed for use in routine clinical practice.

’Typical neuropsychological assessments are time-consuming, expensive, and require highly trained individuals to administer. In comparison, these eye tests are simple, cheap, and take only minutes to conduct.

’This means that a predictive model with such precision could potentially be incorporated in clinics and hospitals to aid physicians by augmenting traditional symptom-based diagnostic criteria.

’The next thing we want to know is when the abnormalities are first detectable and can they be used as disease markers for early intervention studies in major mental illness?’

The study has been published in the November issue of the academic journal Biological Psychiatry.

The journal’s editor Dr. John Krystal commented: ’It is encouraging to see the high sensitivity of this model for the diagnosis of schizophrenia. It will be interesting to see the extent to which this approach enables clinical investigators to distinguish people with schizophrenia from individuals with other psychiatric disorders.’


Article from: dailymail.co.uk














Tune into Red Ice Radio:

Seth Farber & Paul Levy - Hour 1 - The Spiritual Gift of Madness

Paul Levy - Hour 1 - Wetiko & The Dreaming

Paul Levy - George W. Bush & Our Collective Psychosis

Paul Levy - The War on Consciousness

Mike Cross - Hour 1 - Philosophy of a Psychopathic Society

Colin Wilson - The Outsider, The Robot, Magic & the Occult








Related Articles
Hypometric saccade remediation
Why Do Schizophrenics Hear Voices?
Scottish Rite Schizophrenia Research Program
Causal Multiplicity: The Science Behind Schizophrenia
Creative minds "mimic schizophrenia"
Schizophrenic Brains Not Fooled by Optical Illusion


Latest News from our Front Page

Seven Points of Agreement Between Individuals
2014 10 02
In what follows, underlined words are my modifications to the original (cite given at the end) "Seven Points of Agreement Between Individuals" -- a binding contract entered into by individuals with other individuals so as to create a society within which individual sovereignty is upheld. These agreements are thought by the author of the book within which they appear to ...
If Someone Secretly Controlled What You Say, Would Anyone Notice?
2014 10 01
The subject enters a room in which a 12-year-old boy is seated. A 20-minute conversation ensues. The subject quizzes the boy about current events and other topics to get a sense of his intelligence and personality. But the boy is not what he appears to be. Unbeknownst to the subject, the boy is wearing a radio receiver in his ear, and ...
Obama has had accurate intelligence about ISIS since BEFORE the 2012 election, says administration insider
2014 10 01
‘President Barack Obama’s intelligence briefings have provided him with specific information since before he won re-election in 2012 about the growing threat of the terror group now known alternatively as ISIS and ISIL, an administration insider told MailOnline on Monday. ‘Unless someone very senior has been shredding the president’s daily briefings and telling him that the dog ate them, highly accurate ...
Can holding a magnet against your head help defeat depression?
2014 10 01
Former GP Sue Mildred suffered from crippling depression and anxiety for 20 years. On two occasions it was so severe that she ended up in hospital, and for 15 years she was unable to work. Sue, 51, has tried antidepressants, talking therapies and, out of desperation, even ECT (electro-convulsive therapy), where an electric current is passed through the brain. This did ...
Extremists to have Facebook and Twitter vetted by anti-terror police
2014 09 30
Theresa May to announce new Extremist Disruption Orders to strengthen counter-terrorism if the Tories win the next general election Extremists will have to get posts on Facebook and Twitter approved in advance by the police under sweeping rules planned by the Conservatives. They will also be barred from speaking at public events if they represent a threat to “the functioning of democracy”, ...
More News »