Navigation Links
The hand can't be fooled, study shows
Date:3/10/2008

Beer-Sheva, Israel -- Research published in the March issue of Psychological Science, a journal of the Association for Psychological Science, is suggesting that we process images in two very distinct ways.

Ben-Gurion University of the Negev Psychologist Tzvi Ganel and his colleagues presented research participants with the Ponzo illusion, an image common in psychological research that makes two objects that are similar in length appear drastically different. They then hooked participants index finger and thumb to computerized position tracking equipment and asked them to grasp the objects with their fingers.

Even thought the object appeared to be larger (or smaller) than it really was, the size of their grasp reflected the objects real rather than apparent size. For good measure, the researchers arranged the illusion so that the object that appeared to be the smaller of the two was actually the larger of the two.

As Ganel points out, these findings provide compelling support for what psychologists and neuroscientists describe as the two visual systems hypothesis." According to this view, put forward more than a decade ago by Mel Goodale and David Milner, one system, -- vision-for-perception -- gives us our conscious visual experience of the world, allowing us to see objects in the rich context of the scenes in which they are embedded. Its also the one that is fooled by optical illusions.

The other system, vision-for-action, provides the visual control we need to move about and interact with objects. This system does not have to be conscious, but does have to be quick, goal-directed, and accurate - and as a consequence, is much less likely to be fooled by illusions such as the one used by Ganel and his colleagues.

The idea of two visual systems in a single brain might seem initially counter-intuitive.After all, it seems obvious that it is the same subjective image that allows us both to recognize the coffee cup on our desk and to pick it up writes Ganel. But this belief is an illusion, as the new research demonstrates.When there is a conflict between what we perceive and what is really out there in the world, it seems that it is our fingers have an advantage.


'/>"/>

Contact: Catherine West
cwest@psychologicalscience.org
202-293-9300
Association for Psychological Science
Source:Eurekalert

Related medicine news :

1. Prophylactic cranial irradiation in small cell lung cancer significantly increases survival
2. Amid Improving Life Expectancy Rates, Risk of Premature Death is Still Significant for Americans, New Study Shows
3. Elliott Extremely Dissatisfied With Genzyme Bid for Bioenvision; Believes Offer Significantly Undervalues Company
4. Study shows adverse drug events reported to the FDA have significantly increased
5. Patent Expiries of Proscar and Flomax/Harnal Will Cause a Significant Decline in Near-Term Sales of Benign Prostatic Hyperplasia Drugs
6. Ericom Provides Significant Cost-Savings for Major New York City Healthcare Organization
7. Rehabilitation significantly underused after heart attack and bypass surgery
8. First significant genetic finding in severe PMS, or PMDD
9. Promising Phase 3 trial results show biologic therapy ustekinumab significantly improved psoriasis
10. National Domestic Violence Hotline Unveils 10-Year Blueprint to Significantly Reduce Domestic Violence in America
11. Vocantas CallAssure provides hospitals with automated solution for post-discharge patient follow-up
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:6/27/2016)... ... June 27, 2016 , ... A revolution is ... emergency ambulance transport experience for the millions of people who require these medical ... the taxi industry through the use of technology. Now, SmartEMS has put forth ...
(Date:6/26/2016)... ... ... On June 10-11, 2016, A Forever Recovery, a holistic treatment center for ... Table in Battle Creek, MI, where the rehabilitation facility is located. This annual celebration ... world’s leading providers of cereal and other breakfast foods. Its residents often refer to ...
(Date:6/26/2016)... ... ... blind and certified personal trainer is helping to develop a weight loss fitness plan that ... the two major problems leading the fitness industry today:, , All ... They don’t eliminate all the reasons people quit their exercise program , ...
(Date:6/25/2016)... ... June 25, 2016 , ... Austin residents seeking Mohs ... College of Mohs Surgery and to Dr. Russell Peckham for medical and surgical dermatology. ... treatment for skin cancer. The selective fellowship in Mohs Micrographic Surgery completed by Dr. ...
(Date:6/25/2016)... ... June 25, 2016 , ... First Choice Emergency Room , ... Sesan Ogunleye, as the Medical Director of its new Mesquite-Samuell Farm facility. , ... our new Mesquite location,” said Dr. James M. Muzzarelli, Executive Medical Director of First ...
Breaking Medicine News(10 mins):
(Date:6/24/2016)...  Collagen Matrix, Inc., ("Collagen Matrix") the driving ... collagen and mineral based medical devices for tissue ... Messer has joined the company as Vice ... growing portfolio of oral surgery, neurosurgery, orthopaedic and ... the Collagen Matrix executive team as an accomplished ...
(Date:6/24/2016)... -- Dublin ... the " Global Markets for Spectroscopy Equipment" ... This report focuses on the global market ... its applications in various applications. The report deals with ... main industries: pharmaceutical and biotechnology, food and beverage, and ...
(Date:6/24/2016)... 24, 2016 Dehaier Medical Systems Ltd. (NASDAQ: ... develops, markets and sells medical devices and wearable sleep ... a strategic cooperation agreement with Hongyuan Supply Chain Management ... on June 20, 2016, to develop Dehaier,s new Internet ... agreement, Dehaier will leverage Hongyuan Supply Chain,s sales platform ...
Breaking Medicine Technology: