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:6/16/2016)... 2016 The global ... reach USD 1.83 billion by 2024, according to ... Technological proliferation and increasing demand in commercial buildings, ... drive the market growth.      (Logo: ... development of advanced multimodal techniques for biometric authentication ...
(Date:6/7/2016)... , June 7, 2016  Syngrafii Inc. and ... business relationship that includes integrating Syngrafii,s patented LongPen™ ... project. This collaboration will result in greater convenience ... credit union, while maintaining existing document workflow and ... ...
(Date:6/2/2016)... Perimeter Surveillance & Detection Systems, ... Infrastructure, Support & Other Service  The latest ... comprehensive analysis of the global Border Security market ... of $17.98 billion in 2016. Now: In ... in software and hardware technologies for advanced video surveillance. ...
Breaking Biology News(10 mins):
(Date:6/23/2016)... ... June 23, 2016 , ... ... its second eBook, “Clinical Trials Patient Recruitment and Retention Tips.” Partnering with experienced ... this eBook by providing practical tips, tools, and strategies for clinical researchers. , ...
(Date:6/23/2016)... 23, 2016 Houston Methodist Willowbrook Hospital ... Sports Association to serve as their official health ... Methodist Willowbrook will provide sponsorship support, athletic training ... association coaches, volunteers, athletes and families. ... Sports Association and to bring Houston Methodist quality ...
(Date:6/23/2016)... ... June 23, 2016 , ... ... the launch of the Supplyframe Design Lab . Located in Pasadena, Calif., ... the future of how hardware projects are designed, built and brought to market. ...
(Date:6/23/2016)... -- Andrew D Zelenetz , ... Published recently in Oncology & ... Andrew D Zelenetz , discusses the fact ... placing an increasing burden on healthcare systems worldwide, ... the patents on many biologics expiring, interest in ...
Breaking Biology Technology: