Outputs of Two-way ANOVA

[E. Bernardo]

I am using spss to run 2-way anova.  The first column of the outputs (Testof between subject effects) includes terms such as corrected model, intercept, the two effects and interaction term, error, total and corrected total.  I cant understand the italics ones (such as corrected models, error, total, and corrected total).  Can someone suggest online references that discuss such terms used by SPSS?

 

Thank you.

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[Martin Holt]

Hi, Eins.

 

Googling will quickly give you answers. Below are quotes from that: I hope they help.

 

The "corrected model" effect reflects the variation in the dependent attributed to other effects (except the intercept) in the model, after corrected by the mean.

The ratio of effect sums of squares and error sums of squares is what was used in testing the significance of each effect.

Eta-squared is the proportion of the total variability in the dependent variable accounted for by the variation in the independent variable. (Total implies "over all variables of interest)

By observation, corrected total = total - intercept

Best Wishes,

 

Martin Holt

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

From: [hidden email]

To: [hidden email]

Sent: Sunday, December 06, 2009 9:26 AM

Subject: Outputs of Two-way ANOVA

I am using spss to run 2-way anova.  The first column of the outputs (Testof between subject effects) includes terms such as corrected model, intercept, the two effects and interaction term, error, total and corrected total.  I cant understand the italics ones (such as corrected models, error, total, and corrected total).  Can someone suggest online references that discuss such terms used by SPSS?

 

Thank you.

---

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[Jon K Peck]

There are two ways to find the meaning of terms in the SPSS output.  For "corrected model", for example, activate the table by double clicking and right click on the term.  You will generally see a definition.

Alternatively, look at the algorithms document for the procedure.

HTH,
Jon Peck
SPSS, an IBM Company
[hidden email]
312-651-3435

From:	Eins Bernardo <[hidden email]>
To:	[hidden email]
Date:	12/06/2009 02:28 AM
Subject:	[SPSSX-L] Outputs of Two-way ANOVA
Sent by:	"SPSSX(r) Discussion" <[hidden email]>

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I am using spss to run 2-way anova.  The first column of the outputs (Testof between subject effects) includes terms such as corrected model, intercept, the two effects and interaction term, error, total and corrected total.  I cant understand the italics ones (such as corrected models, error, total, and corrected total).  Can someone suggest online references that discuss such terms used by SPSS?
 
Thank you.

---

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[Bruce Weaver]

eins wrote

I am using spss to run 2-way anova.  The first column of the outputs (Testof between subject effects) includes terms such as corrected model, intercept, the two effects and interaction term, error, total and corrected total.  I cant understand the italics ones (such as corrected models, error, total, and corrected total).  Can someone suggest online references that discuss such terms used by SPSS?
 
Thank you.

You've had a couple other responses, but I'll throw mine in too.  I think the issue here is that SPSS uses terminology that is a bit different than is found in most textbooks (at least those used for stats courses in psychology & other social sciences).

SPSS                  Typical textbook description
corrected model    between-cells
error                   within-cells
corrected total     total
SS(total)             sum of squared scores

The "correction" in the SS(corrected total) is subtraction of the grand mean from each score before squaring.  So SS(corrected total) = the sum of the squared deviations about the grand mean, which as noted above is simply called SS(Total) in most textbooks.

HTH.

[E. Bernardo]

To all who replied this thread, thank you.

 

Eins

--- On Sun, 12/6/09, Martin Holt <[hidden email]> wrote:

From: Martin Holt <[hidden email]>
Subject: Re: Outputs of Two-way ANOVA
To: "Eins Bernardo" <[hidden email]>, [hidden email]
Date: Sunday, 6 December, 2009, 12:29 PM

Hi, Eins.

 

Googling will quickly give you answers. Below are quotes from that: I hope they help.

 

The "corrected model" effect reflects the variation in the dependent attributed to other effects (except the intercept) in the model, after corrected by the mean.

The ratio of effect sums of squares and error sums of squares is what was used in testing the significance of each effect.

Eta-squared is the proportion of the total variability in the dependent variable accounted for by the variation in the independent variable. (Total implies "over all variables of interest)

By observation, corrected total = total - intercept

Best Wishes,

 

Martin Holt

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

From: Eins Bernardo

To: SPSSX-L@...

Sent: Sunday, December 06, 2009 9:26 AM

Subject: Outputs of Two-way ANOVA

I am using spss to run 2-way anova.  The first column of the outputs (Testof between subject effects) includes terms such as corrected model, intercept, the two effects and interaction term, error, total and corrected total.  I cant understand the italics ones (such as corrected models, error, total, and corrected total).  Can someone suggest online references that discuss such terms used by SPSS?

 

Thank you.

---

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