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:5/23/2017)... ... May 23, 2017 , ... Cambridge, MA, ... steady since 2009, according to a Workers Compensation Research Institute (WCRI) study, a ... the North Carolina System: CompScope™ Benchmarks, 17th Edition looks at indemnity and ...
(Date:5/23/2017)... ... May 23, 2017 , ... The National Council on ... to announce the organization’s Certified Strength Coach credential has earned accreditation from the ... program validates the competency of qualified candidates for jobs in the Strength and ...
(Date:5/23/2017)... ... 2017 , ... By all indications, and due to months of wet weather, ... diligence, asking homeowners to scout for any open water sources that can be emptied ... buzz of mosquitos is the buzz associated with potential infections stemming from their itchy ...
(Date:5/23/2017)... ... May 23, 2017 , ... ... chat as a standard feature on its secure clinical communication platform. The platform ... to video depending on the type and urgency of a situation. , ...
(Date:5/23/2017)... CA (PRWEB) , ... May 23, 2017 , ... New ... gums and chronic bad breath, can now receive laser gum disease treatments from the ... Douglas Campbell and David Landau are raising awareness of the importance of receiving qualified ...
Breaking Medicine News(10 mins):
(Date:5/6/2017)... , May 5, 2017  Hill-Rom Holdings, Inc. ... add approximately 100,000 square feet to its Welch Allyn ... 2016 its commitment to bring more than 100 new ... where Welch Allyn has maintained a significant presence for ... accommodate these new positions, a large portion of which ...
(Date:5/4/2017)... MEMPHIS, Tenn. , May 4, 2017 /PRNewswire/ ... of Infection Control, Ultraviolet-C light as ... demonstrated Tru-D SmartUVC,s ability to reduce bioburden on ... influenced bioburden reduction on high-touch, complex medical equipment ... in surgical infections. "This study further ...
(Date:5/4/2017)... DIEGO , May 4, 2017  The American ... and Scientific Meeting— OBP Medical , a leading global ... the launch of a new extra-small size and first-in-market ... ER-SPEC vaginal specula. Already available in small, medium, ... makes OBP Medical,s line of single-use lighted specula the ...
Breaking Medicine Technology: