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:


(Date:4/5/2017)... YORK , April 5, 2017 Today ... is announcing that the server component of the HYPR ... known for providing the end-to-end security architecture that empowers ... HYPR has already secured over 15 million ... makers including manufacturers of connected home product suites and ...
(Date:3/30/2017)... , March 30, 2017  On April 6-7, 2017, ... the Genome hackathon at Microsoft,s headquarters in ... competition will focus on developing health and wellness apps ... Hack the Genome is the first hackathon ... The world,s largest companies in the genomics, tech and ...
(Date:3/28/2017)... , March 28, 2017 ... Biometrics), Hardware (Camera, Monitors, Servers, Storage Devices), Software (Video ... and Region - Global Forecast to 2022", published by ... in 2016 and is projected to reach USD 75.64 ... 2017 and 2022. The base year considered for the ...
Breaking Biology News(10 mins):
(Date:10/11/2017)... ... ... Disappearing forests and increased emissions are the main causes of the evolving air ... living in larger cities are affected by air pollution related diseases. , That is ... globally - decided to take action. , “I knew I had to take action ...
(Date:10/10/2017)... ... October 10, 2017 , ... ... pharmaceutical company advancing targeted antibody-drug conjugate (ADC) therapeutics, today confirmed licensing rights ... (Hybrid Polymerized Liposomal Nanoparticle), a technology developed in collaboration with Children’s Hospital ...
(Date:10/10/2017)... , Oct. 10, 2017 SomaGenics announced the ... NIH to develop RealSeq®-SC (Single Cell), expected to be ... small RNAs (including microRNAs) from single cells using NGS ... the need to accelerate development of approaches to analyze ... "New techniques for measuring levels of mRNAs ...
(Date:10/9/2017)... ... 2017 , ... The award-winning American Farmer television series will feature 3 Bar ... Tuesdays at 8:30aET on RFD-TV. , With global population estimates nearing ten billion ... continue to feed a growing nation. At the same time, many of our valuable ...
Breaking Biology Technology:
Cached News: