Navigation Links
The human brain: Detective of auditory and visual change
Date:1/18/2008

The human brain is capable of detecting the slightest visual and auditory changes. Whether it is the flash of a students hand into the air or the faintest miscue of a flutist, the brain instantaneously and effortlessly perceives changes in our environment. Several studies have indicated, however, that even a small span of time in between pre- and post-change images can disturb the brains ability to detect visual discrepancies.

The pre-change scene must be memorized in some way, explained psychologists Laurent Demany, Wiebke Trost, Maja Serman and Catherine Semal from the University of Bordeaux and the French National Center for Scientific Research (CNRS). In the visual domain, numerous experiments have shown that even a very short gap of less than 100ms can dramatically disrupt our ability to detect a local change in complex images. Following such a gap, local changes can be detected only in very simple images. This phenomenon is known as change blindness.

In a recent study, the aforementioned psychologists assessed the effect of time gaps on change detection in audition. Their goal was to determine if the brain uses similar mechanisms to perceive auditory changes as it does with vision. Participants had to detect a pitch change in one tone presented together with other tones. The complexity of the pre-change sound was varied, as well as the duration of the silent interval between the pre- and post-change sounds.

The experimenters reasoned that if auditory change detection is similar to the visual process, a complex sound (including many tones) should be remembered less well than a simple sound (including few tones).

The psychologists discovered, however, that this was not the case. The participants were able to remember even the most complex soundsreaching up to 12 tonesdespite the time delays.

The results of the study, which appear in the January 2008 issue of Psychological Science, a journal of the Association for Psychological Science, indicate that the brain uses more efficient mechanisms in auditory memory than in visual memory. To that extent, the human brain appears to be a keener detective of auditory change than visual change.


'/>"/>

Contact: Katie Kline
kkline@psychologicalscience.org
202-783-2077
Association for Psychological Science
Source:Eurekalert

Related biology news :

1. Monkey malaria widespread in humans and potentially fatal
2. Humana Press journals now available on SpringerLink
3. Researchers uncover new piece to the puzzle of human height
4. Humans have caused profound changes in Caribbean coral reefs
5. New book reveals an evolutionary journey of the human body
6. Accu-Time Systems, Inc. Announces Launch of Next Generation Human Capital Management (HCM) solutions: Global Series(TM)
7. MIT finds key to avian flu in humans
8. Human hormone blocker found to help prevent obesity and diabetes: study
9. There is powerful evidence of evolution in human DNA
10. Where and why humans made skates out of animal bones
11. NIH launches Human Microbiome Project
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:6/2/2016)... -- Perimeter Surveillance & Detection Systems, Biometrics ... Support & Other Service  The latest report ... analysis of the global Border Security market . ... $17.98 billion in 2016. Now: In November ... software and hardware technologies for advanced video surveillance. ...
(Date:5/12/2016)... WearablesResearch.com , a brand of Troubadour Research & ... Q1 wave of its quarterly wearables survey. A particular ... a program where they would receive discounts for sharing ... "We were surprised to see that so many ... CEO of Troubadour Research, "primarily because there are segments ...
(Date:4/26/2016)... and LONDON , ... Finacle, part of EdgeVerve Systems, a product subsidiary ... Onegini today announced a partnership to integrate the ...      (Logo: http://photos.prnewswire.com/prnh/20151104/283829LOGO ) ... provide their customers enhanced security to access and ...
Breaking Biology News(10 mins):
(Date:6/23/2016)...  The Prostate Cancer Foundation (PCF) is pleased to announce 24 ... for prostate cancer. Members of the Class of 2016 were selected from a ... Read More About the Class of 2016 PCF Young Investigators ... ... ...
(Date:6/23/2016)... , June 23, 2016   EpiBiome , a ... $1 million in debt financing from Silicon Valley Bank ... automation and to advance its drug development efforts, as ... facility. "SVB has been an incredible strategic ... services a traditional bank would provide," said Dr. ...
(Date:6/23/2016)... , ... June 23, 2016 , ... STACS DNA Inc., ... Leader at the Arkansas State Crime Laboratory, has joined STACS DNA as a Field ... DNA team,” said Jocelyn Tremblay, President and COO of STACS DNA. “In further expanding ...
(Date:6/23/2016)... , June 23, 2016 Apellis Pharmaceuticals, ... 1 clinical trials of its complement C3 inhibitor, ... and multiple ascending dose studies designed to assess ... of subcutaneous injection in healthy adult volunteers. ... either as a single dose (ranging from 45 ...
Breaking Biology Technology: