Tagged Questions

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0answers
48 views

How do I perform a Mixed model analysis on my data in SPSS?

In my thesis I'm trying to discover which factors influence the CSR (corporate social responsibility, GSE_RAW) behavior of companies. Two groups of possible factors ...
2
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1answer
157 views

Why do coefficients and significance levels change so much in my OLS? Do I need MIXED model instead?

Please consider the following OLS model: As a rule of thumb, a VIF score of max. 5 is considered acceptable collinearity in most fields. So for the better part I believed this model to be quite ...
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0answers
80 views

ANCOVA (GLM) versus Mixed Linear Model with covariate measured at both pre- and post-treatment (in SPSS)

I'm trying to analyze a pre/post study with 4 treatment groups. The Dependent Variable, Speed, measures how quickly a person's facial expression reaches peak intensity; this measure is normally ...
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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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0answers
310 views

Interpreting SPSS mixed linear model output

I have a problem interpreting the output of the mixed model procedure in SPSS. I found a couple of threads dealing with similar problems, but none helped me solve it. I have a 2x2 repeated measures ...
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0answers
142 views

Mixed model repeated measures, nested

I have a study in which I have 3 groups of crews (4 crews in each group) in which there are two people (L/R). Each crew experienced 4 lighting treatments (D1-4), once in one position, and again in ...
1
vote
1answer
234 views

Comparing groups at different time points within repeated measures study using SPSS

I have done a RCT (randomized control trial) of an intervention (which is of 6 week duration) versus control. The outcome measure (an exercise test) has been tested pre-intervention (Pre), immediately ...
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0answers
47 views

How do I get individual values of the random effect intercept in SPSS?

I am implementing a random intercept model in SPSS, and would like to obtain the subject-specific values of the random intercept to test it for normality. Does anyone know what's the SAS equivalent of ...
2
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1answer
183 views

Checking normality of residuals in 2x2 mixed methods ANOVA

I am running a 2x2 mixed method ANOVA (with one between-group factor and one within-group factor - time 1 and time 2). I want to check whether the assumption of normality of residuals is met. When I ...
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0answers
171 views

Effect sizes from LMM

My question is, how to get effect sizes for a linear mixed model? I am using the following model in SPSS: ...
2
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2answers
88 views

“weird” results from multilevel analysis

I am examining the effect of a group variable (with five levels) along with other predictors on achievement growth using SPSS Mixed Model. The descriptive statistics showed a consistent pattern on ...
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1answer
145 views

Difference between predicted values and estimated means

In SPSS linear mixed model (analyze->mixed model->linear), one can opt for predicted values. In the SPSS data file, a column is added with new data, i.e., the predicted values. When I run a linear ...
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0answers
120 views

SPSS Mixed and HLM: Inconsistent Results

I have encountered at least one instance in which SPSS Mixed Models and the HLM package (Raudenbush and Bryk) have given me different parameter estimates for the same three-level hierachical model. I ...
1
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1answer
144 views

Variances not homogeneous problem in ANOVA mixed between-within subjects, too bad?

I'm conducting a 2x3 mixed between-within subjects ANOVA (group x time). I have 20 participants, 10 for each group, who undergo all the 3 measures over time. Levene's test of equality of variances is ...
0
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1answer
473 views

Normality test for anova mixed model in SPSS: I did it in two ways but the results are contrasting

I'm conducting an ANOVA mixed model 2 X 3 (group X condition). Right now, I'm checking for the assumptions of ANOVA, such as normality. I should check indipendently for group and condition, right? I ...
5
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2answers
1k views

Post hoc test in a 2x3 mixed design ANOVA using SPSS?

I have two groups of 10 participants who were assessed three times during an experiment. To test for differences between groups and across the three assessments, I ran a 2x3 mixed design ANOVA with ...
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0answers
90 views

How can I estimated a mixed logit model in SPSS? [closed]

I am doing a psychological experiment and I have 2 groups of people knowing different language and I am going to give them Simon task. I want to use mixed logit model to study the effect of ...
0
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0answers
190 views

Which test to use in a single group pre- and post-treatment analysis

I am attempting to analyse pre-existing data (using SPSS). I have one group of participants, 4 quantitative, non-parametric outcome measures, and am looking to see if there is a change in outcomes ...
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0answers
244 views

Mixed linear model with repeated measures in SPSS

I'm trying to run a mixed linear model analysis with SPSS. When I try to run the analysis, SPSS gives the following error message: ...
2
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1answer
800 views

How to interpret an interaction effect in SPSS output for a repeated measures anova with between and within group factors?

I have conducted a repeated measures ANOVA, with 2 factors: One between factor (Ex_control: exercise intervention versus control) One within factor (...
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0answers
210 views

Redundant parameters in SPSS

I am running a mixed model in SPSS. I have one fixed effect and 3 random effects. I am testing this model on various traits to determine if the fixed effect is significant. For most of the traits I ...
5
votes
0answers
87 views

Balanced repeated measures design

Okay this is my problem: I have 12 participants. Each participant spent 3 nights in my lab doing a reaction time task at four timepoints during the night(12, 1, 2 and 3 oclock), with one week ...
5
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3answers
3k views

Difference between generalized linear models & generalized linear mixed models in SPSS

I am wondering what the differences are in SPSS between analyze-> generalized linear models-> generalized linear models & ...
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0answers
84 views

What model should I use for comparing two techniques in SPSS?

I have 20 images taken from 20 subjects, two methods for analyzing these images, one as a reference, I want to see whether there is a statistically significant difference between the new method and ...
2
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1answer
140 views

How do I predict subject mean (w/ error) with repeated measurements in SPSS?

Context: say I am trying to determine the concentration of a chemical, so I take known concentrations of the chemical and make a standard curve (6 measurements per standard) then measure my unknown 6 ...
3
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1answer
379 views

Inconsistency in mixed-effects model estimation results (STATA and SPSS)

For my thesis there's a big chance that I will need some sort of mixed-effects specification. I have some (non-syntax) experience with SPSS but feel that it won't suffice for my analysis. I have very ...
3
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0answers
62 views

Time series with 3 factors from different sources

I've been asked to try to do a preliminary 'meta-analysis' of some data, but while comfortable with maths I don't have much experience with stats. I'm hoping to get some feedback with what I have ...
1
vote
1answer
421 views

How to interpret 3-way interaction with one continuous variable in mixed model

I have problems interpreting the direction of the effects in my model. Can you help me with this? I conducted an experiment which includes between subject factor: group=2 (coded as 0-1) within ...
0
votes
1answer
239 views

Multilevel model with an ordinal outcome

I have a data set from a survey of health problems and annoyance by traffic noise in people living in residential buildings, with "5-point scale answer" questions. I want to perform a multilevel model ...
1
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0answers
992 views

How do I run a Mixed Model repeated measures analysis in SPSS to evaluate intervention effect while controlling for school?

I am trying to evaluate the effect of an intervention. I have a group-randomised rct design and have established that I have a design effect and therefore need to control for school. So far I have ...