HOME >> BIOLOGY >> NEWS
Human-Like Ability, Categorical Perception, Found In Insects

biologists set up a cricket flight chamber, wired for sound, computerized data-gathering and a built-in breeze from a fan, to make the cricket think it is flying while tethered in midair. "We weren't looking for the so-called continuous perception," Wyttenbach said, explaining that continuous perception allows human color vision to discriminate hundreds of variations between "blue" and "green," even though humans cannot precisely label each bluish-sort-of-green color.

"A more useful ability in some situations is our ability to tell the difference between sounds like 'ba' and 'pa,' " Wyttenbach noted. "Even though there is a continuum of variation between 'ba' and 'pa' based on voice onset time or VOT, which instruments can detect, our ears don't discriminate. We hear either 'ba' or 'pa' and that's how we label it. That is categorical perception, and it looked like crickets might categorically perceive sounds as either 'other crickets' or 'bats.' "

Categorical perception previously had been shown at other laboratories in monkeys, chinchillas and some species of birds, Wyttenbach knew, but getting crickets to explain how they make up their minds would be tricky. His flight chamber experiments were showing that playback sounds mimicking cricket calls made the tethered insects "fly" toward the speaker. And sounds in the bat's ultrasound range made the crickets veer away from the speaker. Still, he couldn't very well ask the crickets: "Do 20 kHz and 40 kHz sound the same or different?"

So the neurobiologists turned to a test suggested by Cornell Professor of Psychology Elizabeth Spelke for another category of notoriously uncooperative research subjects, human babies. Spelke's habituation-dishabituation test determines precisely what stimulus level is "different enough" to get a subject's attention when it has grown accustomed to (or habituated to ) repeated stimuli. Babies respond less and less when they hear "pa" repeated over and over; they pay a
'"/>

Contact: Roger Segelken
hrs2@cornell.edu
607-255-9736
Cornell University News Service
13-Sep-1996


Page: 1 2 3

Related biology news :

1. Brown ecologist garners major National Science Foundation grant
2. APS Foundation names student travel award recipients
3. Institute for OneWorld Health receives Gates Foundation grant
4. National Parkinson Foundation designates UNC as Center of Excellence
5. National Cancer Gene Therapy Foundation gives $4.0 million in research grants
6. Betty Ann Forbes wins 2004 ASM Founders Award
7. Leslie Ann Schiff wins 2004 Carski Foundation Award
8. Grant from GE Foundation to University of Houston to strengthen math, tech pipeline
9. National Foundation For Cancer Research names UCSDs Webster Cavenee NFCR Fellow
10. Founder of UCSD bioengineering program honored with lifetime achievement award
11. Green Foundation, Trust gives $12.8 million for UT Southwestern comprehensive research center

Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Human Like Ability Categorical Perception Found Insects

(Date:7/31/2014)... studies have shown that marine noise can affect animal ... the Universities of Bristol and Exeter and the cole ... demonstrated that boat noise stops embryonic development and increases ... the sea slug Stylocheilus striatus used in ... away and later feed on toxic alga but this ...
(Date:7/30/2014)... A deep-sea octopus protected and tended her eggs until ... published July 30, 2014 in the open-access journal ... Aquarium Research Institute and colleagues. , Octopuses typically have ... females protect and take care of their fertilized eggs ... eggs for 1 to 3 months, but little is ...
(Date:7/30/2014)... University of Helsinki and the Universitat Autnoma de Barcelona ... changes which have taken millions of years to occur. ... of mice teeth, induced in the laboratory, scientists have ... observed in the fossil registry of rodent species which ... To modify the development of their teeth, the team ...
Breaking Biology News(10 mins):Boat noise impacts development and survival of sea hares 2Deep-sea octopus has longest-known egg-brooding period 2Scientists reproduce evolutionary changes by manipulating embryonic development of mice 2
(Date:7/31/2014)... 31, 2014 According to a ... Dots Market - Global Industry Analysis, Size, Share, Growth, ... valued at USD 88.5 million in 2011, which is ... at a CAGR of 53.8% from 2013 to 2023. ... at  http://www.transparencymarketresearch.com/quantum-dots.html Increasing demand for energy ...
(Date:7/31/2014)... -- Research and Markets has announced the ... report to their offering. ... the genetic material or genomes of an organism. It ... discovery and development of diagnostic and therapeutic solutions for ... is supported by three major product segments: Instruments, Consumables, ...
(Date:7/31/2014)... Calif. (PRWEB) July 31, 2014 Held ... diagnosed patients with an overview of the disease and ... of drug side effects, as well as updates on ... grateful to Dr. Sandy Srinivas for organizing this educational ... of kidney cancer. “Sandy and her colleagues have put ...
(Date:7/31/2014)... BOTHELL, Wash. , July 31, 2014   ... a leading developer, manufacturer and marketer of proprietary clinical ... media and precision thermal shipping products ... Company,s second quarter 2014 financial results will be released ... will host a conference call and live webcast at ...
Breaking Biology Technology:Global Quantum Dots Market is Expected to Reach USD 8,246.8 Million in 2023: Transparency Market Research 2Global Quantum Dots Market is Expected to Reach USD 8,246.8 Million in 2023: Transparency Market Research 3Global Quantum Dots Market is Expected to Reach USD 8,246.8 Million in 2023: Transparency Market Research 4Global Genomics Market 2014-2018: Key Vendors are F. Hoffmann-La Roche, Life Technologies, Qiagen and Illumina 2BioLife Solutions to Report Financial Results for Second Quarter 2014 and Provide Business Update on August 7, 2014 2
Cached News: