Re: AUDITORY Digest - 27 Mar 2006 to 28 Mar 2006 (#2006-70)

Greetings, list.

Regarding Leon's comment about echoic memory and short signals:

In our work with tonal patterns that vary from trial to trial, we (Gary Kidd and I) found that accurate discrimination of changes in component frequency was easy to achieve, so long as the duration of the target component was about 25% or more of the total pattern duration. That finding seemed valid over a surprising range of total pattern durations, from 100 or so ms to 2 sec. As the target duration is reduced from that proportion (25%) performance decays very rapidly. Bob Lutfi is able to predict that result with his CoRE model, with selection of proper weights.

Chuck Watson

Kidd, Gary R. and Watson, C. S. (1992) The “proportion-of-the-total-duration rule for the discrimination of auditory patterns. J. Acoust. Soc. Am., 92, 3109-3118.

Lutfi RA (1993) A model of auditory pattern analysis based on component-relative-entropy. J. Acoust. Soc. Am. 94, 748-758.

-----Original Message-----
From: AUDITORY Research in Auditory Perception [mailto:AUDITORY@xxxxxxxxxxxxxxx] On Behalf Of AUDITORY automatic digest system
Sent: Wednesday, March 29, 2006 12:01 AM
To: AUDITORY@xxxxxxxxxxxxxxx
Subject: AUDITORY Digest - 27 Mar 2006 to 28 Mar 2006 (#2006-70)

There is 1 message totalling 399 lines in this issue.

Topics of the day:

1. looking for a control task /spectro-temporal processing

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Date: Tue, 28 Mar 2006 11:30:59 +0200

From: Leon van Noorden <leonvannoorden@xxxxxxxxx>

Subject: Re: looking for a control task /spectro-temporal processing

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Dear Nadine,

The choice of your control task should depend on which step of the

perception chain you want to control.

I always found a large influence on the possibility to go back in your

'echoic' memory when using such short stimuli as you propose. A way to

control the echoic memeory is to embed your short stimulus in a much

longer one of similar tones.

If you want to control the stage in which you recognise the pattern you

should embed the sequence in similar patterns.

What is your intention with the control signal?

Regards,

Leon van Noorden

-----Original Message-----

From: AUDITORY Research in Auditory Perception

[mailto:AUDITORY@xxxxxxxxxxxxxxx] On Behalf Of Nadine Gaab

Sent: maandag 27 maart 2006 22:37

To: AUDITORY@xxxxxxxxxxxxxxx

Subject: looking for a control task /spectro-temporal processing

Hello list! We are designing an experiment that examines auditory

spectro-temporal processing:

"Subjects will listen to three-tone sequences comprised of two complex

tones and will be asked to reproduce the order of the tones manually.

Tones will have a frequency of either 100Hz or 300Hz. The

Inter-Stimulus-Interval (ISI) between the three tones will vary in

several steps (e.g. 5ms, 20ms, 50ms and 300ms).

We are looking for a control task that does not involve auditory

temporal processing but it should still be an auditory task and it

should not produce ceiling effects.

We thought about amplitude/intensity discrimination with a very long ISI

or environmental sound categorization..any other thoughts or comments?

Thanks a lot

Nadine

"If we knew what it was we were doing, it would not be called research,

would it?" A. Einstein (1879-1955)

Nadine Gaab, PhD

Postdoctoral Associate

Department of Brain and Cognitive Sciences

Massachusetts Institute of Technology

77 Massachusetts Avenue

Room NE46-4037C

Cambridge, MA 02139

phone: (617)-253-3415

email: gaab@xxxxxxx

http://web.mit.edu/gabrieli-lab/people/gaab.htm

<http://web.mit.edu/bcs/>

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<span =

style=3D'font-size:

10.0pt;font-family:Arial;color:navy'>Dear Nadine,

<span =

style=3D'font-size:

10.0pt;font-family:Arial;color:navy'>

<span =

style=3D'font-size:

10.0pt;font-family:Arial;color:navy'>The choice of your control task =

should

depend on which step of the perception chain you want to =

control.

<span =

style=3D'font-size:

10.0pt;font-family:Arial;color:navy'>I always found a large influence on =

the

possibility to go back in your ‘echoic’ memory when using =

such

short stimuli as you propose. A way to control the echoic memeory is to =

embed

your short stimulus in a much longer one of similar =

tones.

<span =

style=3D'font-size:

10.0pt;font-family:Arial;color:navy'>If you want to control the stage in =

which

you recognise the pattern you should embed the sequence in similar =

patterns.

<span =

style=3D'font-size:

10.0pt;font-family:Arial;color:navy'>

<span =

style=3D'font-size:

10.0pt;font-family:Arial;color:navy'>What is your intention with the =

control

signal?

<span =

style=3D'font-size:

10.0pt;font-family:Arial;color:navy'>

<span =

style=3D'font-size:

10.0pt;font-family:Arial;color:navy'>Regards,

<span =

style=3D'font-size:

10.0pt;font-family:Arial;color:navy'>Leon van Noorden

<span =

style=3D'font-size:

10.0pt;font-family:Arial;color:navy'>

<font size=3D2 =

face=3DTahoma><span

lang=3DEN-US style=3D'font-size:10.0pt;font-family:Tahoma'>-----Original

Message-----

From: AUDITORY Research =

Auditory Perception [mailto:AUDITORY@xxxxxxxxxxxxxxx] <span

style=3D'font-weight:bold'>On Behalf Of Nadine Gaab

Sent: maandag 27 maart =

2006 22:37

To: =

AUDITORY@xxxxxxxxxxxxxxx

Subject: looking for a =

control

task /spectro-temporal processing

<font size=3D3

face=3D"Times New Roman"><span =

style=3D'font-size:12.0pt'>

<p class=3DMsoNormal =

style=3D'margin-left:36.0pt;text-autospace:none'><font size=3D2

face=3D"Courier New"><span lang=3DEN-US =

style=3D'font-size:10.0pt;font-family:"Courier New"'>Hello

list! We are designing an experiment that examines auditory =

spectro-temporal

processing:

<p class=3DMsoNormal =

style=3D'margin-left:36.0pt;text-autospace:none'><font size=3D2

face=3DArial><span lang=3DEN-US =

style=3D'font-size:10.0pt;font-family:Arial'>“<font

size=3D2 face=3D"Courier New"><span lang=3DEN-US =

style=3D'font-size:10.0pt;font-family:

"Courier New"'>Subjects will listen to three-tone sequences comprised of =

two

complex tones and will be asked to reproduce the order of the tones =

manually.

Tones will have a frequency of either 100Hz or 300Hz. The

Inter-Stimulus-Interval (ISI) between the three tones will vary in =

several

steps (e.g. 5ms, 20ms, 50ms and 300ms).

<p class=3DMsoNormal =

style=3D'margin-left:36.0pt;text-autospace:none'><font size=3D2

face=3D"Courier New"><span lang=3DEN-US =

style=3D'font-size:10.0pt;font-family:"Courier New"'>We

are looking for a control task that does not involve auditory temporal

processing but it should still be an auditory task and it should not =

produce

ceiling effects.

<p class=3DMsoNormal =

style=3D'margin-left:36.0pt;text-autospace:none'><font size=3D2

face=3D"Courier New"><span lang=3DEN-US =

style=3D'font-size:10.0pt;font-family:"Courier New"'>We

thought about amplitude/intensity discrimination with a very long ISI or

environmental sound categorization….any other thoughts or =

comments?

<p class=3DMsoNormal =

style=3D'margin-left:36.0pt;text-autospace:none'><font size=3D2

face=3D"Courier New"><span lang=3DEN-US =

style=3D'font-size:10.0pt;font-family:"Courier New"'>Thanks

a lot

<p class=3DMsoNormal =

style=3D'margin-left:36.0pt;text-autospace:none'><font size=3D2

face=3D"Courier New"><span lang=3DEN-US =

style=3D'font-size:10.0pt;font-family:"Courier New"'>Nadine

<font size=3D2 face=3D"Times New =

Roman"><span

lang=3DEN-US style=3D'font-size:10.0pt'>--

<font size=3D2 face=3D"Times New =

Roman"><span

lang=3DEN-US style=3D'font-size:10.0pt'>"If we knew what it was we =

were doing,

it would not be called research, would it?"   A. Einstein

(1879-1955)

<p =

style=3D'margin-right:0cm;margin-bottom:3.0pt;margin-left:36.0pt'><font

size=3D2 face=3D"Times New Roman"><span lang=3DEN-US =

style=3D'font-size:10.0pt'>Nadine

Gaab, PhD

<p =

style=3D'margin-right:0cm;margin-bottom:3.0pt;margin-left:36.0pt'><font

size=3D2 face=3D"Times New Roman"><span lang=3DEN-US =

style=3D'font-size:10.0pt'>Postdoctoral

Associate

<p =

style=3D'margin-right:0cm;margin-bottom:3.0pt;margin-left:36.0pt'><font

size=3D2 face=3D"Times New Roman"><span lang=3DEN-US =

style=3D'font-size:10.0pt'>Department

of Brain and Cognitive Sciences

<p =

style=3D'margin-right:0cm;margin-bottom:3.0pt;margin-left:36.0pt'><font

size=3D2 face=3D"Times New Roman"><span lang=3DEN-US =

style=3D'font-size:10.0pt'>Massachusetts

Institute of Technology

<p =

style=3D'margin-right:0cm;margin-bottom:3.0pt;margin-left:36.0pt'><font =

size=3D2 face=3D"Times New Roman"><span lang=3DEN-US =

style=3D'font-size:10.0pt'><ns0:Street w:insAuthor=3D"Nadine Gaab" =

w:insDate=3D"2006-03-27T15:26:00Z" w:endInsAuthor=3D"Nadine Gaab" =

w:endInsDate=3D"2006-03-27T15:26:00Z"><ns0:address w:insAuthor=3D"Nadine =

Gaab" w:insDate=3D"2006-03-27T15:26:00Z" w:endInsAuthor=3D"Nadine Gaab" =

w:endInsDate=3D"2006-03-27T15:26:00Z">77

Massachusetts Avenue</ns0:address></ns0:Street>

<p =

style=3D'margin-right:0cm;margin-bottom:3.0pt;margin-left:36.0pt'><font

size=3D2 face=3D"Times New Roman"><span lang=3DEN-US =

style=3D'font-size:10.0pt'>Room

NE46-4037C

<p =

style=3D'margin-right:0cm;margin-bottom:3.0pt;margin-left:36.0pt'><font

size=3D2 face=3D"Times New Roman"><span lang=3DEN-US =

style=3D'font-size:10.0pt'><ns0:place w:insAuthor=3D"Nadine Gaab" =

w:insDate=3D"2006-03-27T15:26:00Z" w:endInsAuthor=3D"Nadine Gaab" =

w:endInsDate=3D"2006-03-27T15:26:00Z"><ns0:City w:insAuthor=3D"Nadine =

Gaab" w:insDate=3D"2006-03-27T15:26:00Z" w:endInsAuthor=3D"Nadine Gaab" =

w:endInsDate=3D"2006-03-27T15:26:00Z">Cambridge</ns0:City></ns0:place>,

<ns0:State w:insAuthor=3D"Nadine Gaab" =

w:insDate=3D"2006-03-27T15:26:00Z" w:endInsAuthor=3D"Nadine Gaab" =

w:endInsDate=3D"2006-03-27T15:26:00Z">MA</ns0:State>

<ns0:PostalCode w:insAuthor=3D"Nadine Gaab" =

w:insDate=3D"2006-03-27T15:26:00Z" w:endInsAuthor=3D"Nadine Gaab" =

w:endInsDate=3D"2006-03-27T15:26:00Z"><font

size=3D2><span lang=3DEN-US =

style=3D'font-size:10.0pt'>02139</ns0:PostalCode>

<p =

style=3D'margin-right:0cm;margin-bottom:3.0pt;margin-left:36.0pt'><font

size=3D2 face=3D"Times New Roman"><span lang=3DEN-US =

style=3D'font-size:10.0pt'>phone:

(617)-253-3415

<p =

style=3D'margin-right:0cm;margin-bottom:3.0pt;margin-left:36.0pt'><font

size=3D2 face=3D"Times New Roman"><span lang=3DEN-US =

style=3D'font-size:10.0pt'>email: <a

href="">

<p class=3DMsoNormal =

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36.0pt'><span lang=3DEN-US =

style=3D'font-size:

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href="">

du/gabrieli-lab/people/gaab.htm</a>

<span =

lang=3DEN-US

style=3D'font-size:10.0pt;font-family:Arial'><a =

href="">

<font size=3D3

face=3D"Times New Roman"><span lang=3DEN-US =

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