Tagged Questions

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1answer
104 views

How do I set up a single continuous independent variable for a repeated measures linear model?

I'm doing an education study and I'm trying to see the effect of website usage on quiz scores in a class of college students. There were 30 students in the class and they took 10 weekly quizzes over ...
1
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0answers
97 views

Repeated measures ANOVA: Mauchly's test undefined

I'm doing a two-way between-within ANOVA in SPSS. I have two groups with 9 subjects each (so total = 18), and 24 levels of one repeated measure. I understand why Mauchly's test of Sphericity has no ...
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0answers
36 views

Linear mixed model estimated means

I am trying to determine how to get SPSS (19.0) to give out estimated means for my interaction. To preface, my analysis has 3 groups (group a, b and c) and each group was measured at 5 time points. We ...
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1answer
145 views

To find significant differences between means using repeated measures GLM

I am new in using SPSS and stuck with General Linear Model [which is just linear model] procedure. I have 8 cognition variables like latency, thigmotaxis, spatial, quadrant, nt quadrant, proximity, ...
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2answers
289 views

What terms should I include in a linear regression model?

Consider the following OLS output. My question is: If you have to define a linear equation from the regression, do you then only include significant variables? If so, the equation according to the ...
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2answers
2k views

Significant interaction between covariate and factor in SPSS GLM

In testing gender difference on the relationship between variable A and B, A is the covariate (or independent variable) B is the dependent variable Gender is the factor As I understand it, if ...
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2answers
1k views

General linear model with interaction term in SPSS

Following my question here, I will be most grateful for further assistance to clear my confusion. The confusion is because I have read in many places that when you use ANCOVA in GLM (in SPSS), the ...
1
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2answers
818 views

Explanation of “covariate” in general linear model in SPSS

I am completing a project for a client using general linear model (GLM command) in SPSS/PASW (Ver. 17) Basically, the project is designed to find out if factors such as gender and age affect the ...
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1answer
566 views

Using Beta to interpret interaction in general linear model

Following the question here, someone suggested that I could just look at the B column in SPSS "Parameter Estimates" table to interpret the interaction. For instance, the B column for one of my tests ...
0
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1answer
151 views

Significant interaction in linear model with Pearson r as possible explanation

I have tested gender difference on the relationship between Variable A and B using linear model (GLM command in SPSS). I have found that the interaction of A (covariate/independent variable) with ...