Freeware for IRT and G-Theory

[E. Bernardo]

Can someone suggest a freeware for IRT and G-theory? PLease post them here.

---

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[Ryan]

http://www.winsteps.com/ministep.htm

eins wrote

Can someone suggest a freeware for IRT and G-theory? PLease post them here.


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[Bruce Weaver]

For G-theory:

      http://fhs.mcmaster.ca/perd/download/g_string/index.htm

eins wrote

Can someone suggest a freeware for IRT and G-theory? PLease post them here.


      New Email addresses available on Yahoo!
Get the Email name you've always wanted on the new @ymail and @rocketmail.
Hurry before someone else does!
http://mail.promotions.yahoo.com/newdomains/ph/

[Bruce Weaver]

I think this was meant to go to the list as well as to me.

From:   SR Millis
Sent: April 3, 2010 9:22:35 AM
To:     Bruce Weaver

There is the free student version (Minstep) of Winsteps--the Rasch analysis software:
 
http://winsteps.com/ministep.htm
 
 

Bruce Weaver wrote

For G-theory:

      http://fhs.mcmaster.ca/perd/download/g_string/index.htm

eins wrote

Can someone suggest a freeware for IRT and G-theory? PLease post them here.

[E. Bernardo]

Unfortunately, the software for the G-Theory is no longer available from this site http://fhs.mcmaster.ca/perd/download/g_string/index.htm

--- On Sat, 4/3/10, Bruce Weaver <[hidden email]> wrote:

From: Bruce Weaver <[hidden email]>
Subject: Re: Freeware for IRT and G-Theory
To: [hidden email]
Date: Saturday, 3 April, 2010, 12:55 PM

For G-theory:

      http://fhs.mcmaster.ca/perd/download/g_string/index.htm



eins wrote:

>
> Can someone suggest a freeware for IRT and G-theory? PLease post them
> here.
>
>
>       New Email addresses available on Yahoo!
> Get the Email name you've always wanted on the new @ymail and
> @rocketmail.
> Hurry before someone else does!
> http://mail.promotions.yahoo.com/newdomains/ph/
>

-----
--
Bruce Weaver
bweaver@...
http://sites.google.com/a/lakeheadu.ca/bweaver/
"When all else fails, RTFM."

NOTE:  My Hotmail account is not monitored regularly.
To send me an e-mail, please use the address shown above.
--
View this message in context: http://old.nabble.com/Freeware-for-IRT-and-G-Theory-tp28125308p28126781.html
Sent from the SPSSX Discussion mailing list archive at Nabble.com.

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[Bruce Weaver]

I have a zip file with the installer for version 3.1.1.  If you want it, drop me a line using the e-mail address shown in my signature info below.  

Cheers,
Bruce

eins wrote

Unfortunately, the software for the G-Theory is no longer available from this site http://fhs.mcmaster.ca/perd/download/g_string/index.htm


--- On Sat, 4/3/10, Bruce Weaver <[e-mail]> wrote:


From: Bruce Weaver <[e-mail]>
Subject: Re: Freeware for IRT and G-Theory
To: [e-mail]
Date: Saturday, 3 April, 2010, 12:55 PM


For G-theory:

      http://fhs.mcmaster.ca/perd/download/g_string/index.htm



eins wrote:
>
> Can someone suggest a freeware for IRT and G-theory? PLease post them
> here.
>
>
>       New Email addresses available on Yahoo!
> Get the Email name you've always wanted on the new @ymail and
> @rocketmail.
> Hurry before someone else does!
> http://mail.promotions.yahoo.com/newdomains/ph/
>


-----
--
Bruce Weaver
[e-mail]
http://sites.google.com/a/lakeheadu.ca/bweaver/
"When all else fails, RTFM."

NOTE:  My Hotmail account is not monitored regularly.
To send me an e-mail, please use the address shown above.
--
View this message in context: http://old.nabble.com/Freeware-for-IRT-and-G-Theory-tp28125308p28126781.html
Sent from the SPSSX Discussion mailing list archive at Nabble.com.

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[Humphrey Paulie]

Dear all,
I have acorrealted a neumber of varibales (Pearson) and have found correlations as low as .15 to be significant at 0.01 level (two-tailed). My sample size is 280.
I dont know how to interpret this.
the coefficinets are very small however statistically significant.
Which one should I trust, the size of the coefficients or the statistical significnace?
I will be thankful for comments.
Cheers
Humphrey

[ANDRES ALBERTO BURGA LEON]

Hello Humphrey:

In my opinion, we need to distinguish between statistical significance and practical significance.

The statistical significance only means that this correlation is expected to be different from 0 in the population. You should also look at the size of the correlation considering the field in which you are working. Is your correlation similar to that found in other studies using this variables? This correlation have any practical meaning? With a correaltion as low as 0.15 the variance of one variable explains 2.25% of the variance from the other variable, wich is very low.

Kindly

Mg. Andrés Burga León
Coordinador de Análisis e Informática
Unidad de Medición de la Calidad Educativa
Ministerio de Educación del Perú
Calle El Comercio s/n (espalda del Museo de la Nación)
Lima 41
Perú
Teléfono 615-5840

Humphrey Paulie <[hidden email]>
Enviado por: "SPSSX(r) Discussion" <[hidden email]>

12/05/2010 06:01 a.m.

Por favor, responda a
Humphrey Paulie <[hidden email]>

Para	[hidden email]
cc
Asunto	Size or significance of correlations

Dear all,
I have acorrealted a neumber of varibales (Pearson) and have found correlations as low as .15 to be significant at 0.01 level (two-tailed). My sample size is 280.
I dont know how to interpret this.
the coefficinets are very small however statistically significant.
Which one should I trust, the size of the coefficients or the statistical significnace?
I will be thankful for comments.
Cheers
Humphrey

[statisticsdoc]

Humphrey,
The significance test addresses the question of whether you can reject the Null Hypothesis that your sample was drawn from a population in which the correlation is zero.  As sample size increases, even very small correlations can be statistically significant in the sense of being non-zero.  Nonetheless, the effeft size (square of the.correlation ) can be miniscule.  Which do you trust? Trust both but recognoze that statistical significance and effect size are different issues.
Best,
Steve Brand
www.StatisticsDoc.com

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[Humphrey Paulie]

In such situations is it a good and common thing to devide my sample into two or three groups according to their scores on one of the variables and compare their means on the other variable with a t-test or a one-way ANOVA?
Humphrey

--- On Wed, 5/12/10, Statisticsdoc Consulting <[hidden email]> wrote:

From: Statisticsdoc Consulting <[hidden email]>
Subject: Re: Size or significance of correlations
To: [hidden email]
Date: Wednesday, May 12, 2010, 8:18 AM

Humphrey,
The significance test addresses the question of whether you can reject the Null Hypothesis that your sample was drawn from a population in which the correlation is zero.  As sample size increases, even very small correlations can be statistically significant in the sense of being non-zero.  Nonetheless, the effeft size (square of the.correlation ) can be miniscule.  Which do you trust? Trust both but recognoze that statistical significance and effect size are different issues.
Best,
Steve Brand
www.StatisticsDoc.com

=====================
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