Make this your homepage
 

Welcome: ART / ENTERTAINMENT | AUTOMOTIVE | BUSINESS | LIFESTYLE | HEALTH / MEDICAL | TECHNOLOGY | EDUCATION |

RSS
News Guide Page: EDUCATION: Science

Where am I? How our brain works as a GPS device

10.01.2009 14:07
category: EDUCATION > Science
Where am I? How our brain works as a GPS device

We've all experienced the feeling of not knowing where we are. Being disoriented is not pleasant, and it can even be scary, but luckily for most of us, this sensation is temporary. The brain employs a number of tricks to reorient us, keeping our confusion to a minimum and quickly pointing us in the right direction. Research has suggested that animals and young children mainly rely on geometric cues (e.g. lengths, distances, angles) to help them get reoriented. Human adults, however, can also make use of feature cues (e.g. color, texture, landmarks) in their surrounding area. But which method do we use more often? Psychologists Kristin R. Ratliff from the University of Chicago and Nora S. Newcombe from Temple University conducted a set of experiments investigating if human adults have a preference for using geometric or feature cues to become reoriented.

The first experiment took place in either a large or small white, rectangular room with a landmark (a big piece of colorful fabric) hanging on one wall. The study volunteers saw the researcher place a set of keys in a box in one of the corners. The volunteers were blindfolded and spun around, to become disoriented. After removing the blindfold, they had to point to the corner where the keys were. After a break, the volunteers were told the experiment would be repeated, although they wouldn't watch the researcher hide the keys. Unbeknownst to them, during the break the researchers moved the landmark to an adjacent wall—this change forced the volunteers to use either geometric cues or feature cues, but not both, to reorient themselves and locate the keys. For the second experiment, the researchers used a similar method, except they switched room sizes (the volunteers moved from a larger room to a smaller room and vice versa) during the break.

The results, reported in Psychological Science, a journal of the Association for Psychological Science, reveal that the brain does not have a distinct preference for certain cues during reorientation. In the first experiment, volunteers reoriented themselves by using geometric cues in the smaller room but used feature cues in the larger room. However, the volunteers who went from the larger room to the smaller room in the second experiment also relied on feature cues, searching for the landmark to become reoriented.

During the second experiment, the researchers surmise, the volunteers had a positive experience using feature cues in the large room, so they kept on relying on the landmark in the smaller room to become reoriented. These findings indicate that the brain takes into account a number of factors, including the environment and our past experiences, while determining the best way to reorient us to our surroundings.

For more information about this study, please contact: Kristin Ratliff (krratliff@uchicago.edu)

Psychological Science is ranked among the top 10 general psychology journals for impact by the Institute for Scientific Information. For a copy of the article "Reorienting When Cues Conflict" and access to other Psychological Science research findings, please contact Barbara Isanski at 202-293-9300 or bisanski@psychologicalscience.org



 

Comments:

03.09.2010 | 04:03
category: EDUCATION : Science
LSUHSC pediatric weight expert provides obesity trinity answers New Orleans, LA – In a first person paper published in the August 27, 2010 issue of Childhood Obesity, Dr. Melinda Sothern, Director of Health Promotion and Professor of Public Health at LSU Health Sciences Center New Orleans, provides three ways to de-program the 1950s obesity trinity underlying the current obesity epidemic in the United States and protect future generations from its health consequences.
03.09.2010 | 04:03
category: EDUCATION : Science
Test-tube calf embryos more likely to survive Texas summersStephenville study compares conventional AI with embryo transferSTEPHENVILLE -- Think you\'re uncomfortable in the extreme Texas summer heat? Try being an ovulating 1,200-pound mother cow. Studies have shown that heat-stressed dairy cows suffer from damage to their ovarian follicles. Moreover, the eggs produced by the damaged follicles may also be damaged, said Dr. Todd Bilby, Texas AgriLife Extension Service dairy specialist.
03.09.2010 | 04:03
category: EDUCATION : Science
Scientists identify molecules involved in touch and other mechanically activated systemsFindings could lead to new treatment approaches in pain, deafness and cardiac functionLA JOLLA, CA – September 2, 2010 – Scripps Research Institute scientists have identified two proteins with potential to be important targets for research into a wide range of health problems, including pain, deafness, and cardiac and kidney dysfunction. The study was published in Science Express, the advanced, online edition of the journal Science, on September 2, 2010.
© Copyright 2005-2010 NewsGuide.us. All rights reserved.