SPSS (Statistical Package for the Social Sciences) is a proprietary cross-platform general-purpose statistical software package.
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333 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
135 views
Randomly selecting x number of cases from 4 groups - script modification
I managed to get together the code (1) below. It's essentially a monte carlo discriminant function script that also uses oms to output.
It runs a given number of cases through discriminant function ...
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0answers
177 views
Comparing two likert scale answers
we have performed a study asking participants to describe a current method they use to perform various interaction scenarios on computers and a proposed method they would instead like to use. We have ...
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3answers
594 views
“matrix is not positive definite” - even when highly correlated variables are removed
I am running a factor analysis in SPSS and get a "matrix is not positive definite" error from my correlation matrix. I've tried removing correlated variables, but I have to remove all variables down ...
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1answer
106 views
SPSS:While performing ANCOVA, I get a warning: large number of columns may cause integer overflow. How do I resolve this?
SPSS Warning
The large number of columns in the design matrix will cause integer overflow. The large number of columns may be due to too many levels in one or more factors, or to higher-order ...
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0answers
147 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 ...
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1answer
46 views
A statistic to describe a correlation with progression
I want to see if the proportion of 'I don't know' responses correlates with the progression through the survey. Generally we expect this proportion to increase ...
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1answer
256 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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2answers
128 views
How to analyse three way ANOVA that also has pre-post and one within subjects factor?
I'm currently having a problem understanding on how to enter and calculate my data in SPSS.
I have a three way design in which there are 2 variables each in
Experts vs Novice;
Guided Discovery vs ...
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1answer
122 views
Two-way ANOVA repeated measures
I would like to know, if you got a significant interaction in a two-way repeated measures ANOVA in SPSS, how can you visualize the interaction (especially using syntax)?
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1answer
400 views
Best factor extraction methods, with reference to SPSS
SPSS offers several methods of factor extraction:
Principal components (which isn't factor analysis at all)
Unweighted least squares
Generalized least squares
Maximum Likelihood
Principal Axis
Alpha ...
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0answers
68 views
Two-way Ancova in SPSS
Does anybody know the syntax to do an ANCOVA with two IV and one covariate in SPSS?
Best,
Nuria
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1answer
450 views
Can non normal data be used for factor analysis and multiple regression? If so what is the procedure to justify it?
While I was writing up the analysis in my thesis, I just came across when rechecking my test for normality, that the p-value for most continuous variables was .000, which is less than .05, and it ...
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70 views
merging two studies into a repeated nested design in SPSS
I've got a pretty messy situation: I'm trying to merge the data from two related studies into one analysis but they were designed slightly differently. Both studies took place at the same location and ...
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1answer
141 views
Compare means of two groups with a variable that has multiple sub-group
I was unable to understand how to compare multiple mean values in each group. Within the subgroup the mean values influence each other (If one changes, the other changes automatically).
I collected ...
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1answer
532 views
Performing a biserial correlation on SPSS v21
I have a set of data in which the response variable is continuous and the other independent variables are dichotomous (not naturally occurring).
I think I have to perform Biserial correlation (I an ...
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1answer
417 views
compare means of of multiple dependent variables between two groups
I have two independent groups who travel with different modes. If I want to compare the distance traveled (which is a continuous variable) by different modes for these two groups. How do I compare ...
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2answers
353 views
Analysis and writing up results
I am doing research for my Masters studies and am battling a bit with the statistical side of my study. I used a survey and have captured all the data into SPSS. I have no statistical background, I ...
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2answers
310 views
Generalized Linear Model in SPSS with common values among predictors treated as subpopulations. Why?
I am teaching a class on logistic regression with SPSS. The textbook supplies a sample data set with a binary predictor and two numeric covariates. The sample contains 1000 rows and a number of these ...
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1answer
117 views
Multinomial log. regression in SPSS with a dummy independent variable
This is my test design which is simply a grouping variable:
When I choose to regress a gender variable (w/m) onto this grouping variable with a multinomial logisitic regression model I'll observe
...
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0answers
402 views
How do you interpret the test of between subject effect in mixed ANOVA?
I am doing research on perception and writing styles.
I subjected my participants to 2 type of writing styles and a pre test and post test to measure their perception. I have done a repeated ...
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1answer
328 views
Interaction in generalized linear model
I have 2 continuous variables as my predictors and the interaction between them, so 3 effects all together (when I center my predictors only the interaction is significant). I am using a binary logit ...
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2answers
279 views
Linear Regression Analysis using SPSS (I think)
I am trying to conduct a study into whether or not female board presence affects firm performance. My background is accountancy and business NOT maths or statistics and so I don't really understand ...
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0answers
59 views
Factor analysis
I did a principal component factor analysis with varimax rotation in SPSS. 69 variables were reduced to 12 components, but 2 components are blank and without any variable. Namely: all of my variables ...
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1answer
562 views
How to analyze Max Diff via R or SPSS
I am interested in utilizing Maximum Difference Scaling (Max Diff) for a survey, but apart from the Sawtooth software, I was not able to find a good answer on how to best analyze Max Diff.
What is the ...
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0answers
48 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 ...
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110 views
Does SPSS give factor scores for mean subtracted variables?
From the Johnson's book, I can see the orthogonal factor model is as follows:
$X-\mu=LF+\epsilon$
So if I use SPSS for extracting factor scores from a factor analysis of several variables, then am I ...
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41 views
Comparing tests for staging cancer
I am comparing 4 different tests for the evaluation/identification of cancer. One is a continuous variable yielding cut-off values based on both the mean and the median of 5 consecutive measurements ...
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1answer
196 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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1answer
196 views
Calculating factor scores in SPSS
I have done a factor analysis on different attributes of different cigarette brands (e.g. how expensive consumers find it, etc.).
Three factors were calculated out of the many attributes after ...
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1answer
158 views
Correlate continuous data with dichotomous data, with correction for an ordinal variable?
I want to study association b/w continuous data (age) and dichotomous data (complication: yes/no), with "correction" for an ordinal variable (intra-operative nerve laesion).
I have a database of 427 ...
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1answer
79 views
How to regress a time series of proportions?
Every month, an organization surveys some of its customers (the total number of customers is also known).
The sampled customers answer a survey with a dozen or so questions; sometimes, customers ...
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0answers
54 views
Which test to compare two datasets?
I have used a stimulus (stimulus1) in a perception test, to see if the participants perceive it as A or B in a forced choice task. (the stimulus is composed of several features f1,f2...)
Then I have ...
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0answers
126 views
Performing regression and correlation in SPSS
I hope you are doing good, This is Khawaja Fawad Latif - Sir, i am enrolled in PhD and currently working on my Rresearch Proposal. Sir i have this one question if you could kindly answer my query i ...
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93 views
Please help me in designing and analysis of my questionnaire
Hi to all of my friends,
I really stuck very bad in this issue , hope one of u can help me
Recently I have designed one questionnaire (link:click here), But I'm not sure if the questions are designed ...
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0answers
128 views
Very high correlation between two variables in SEM as compared to SPSS
I am testing a model which involves three variables. I am testing a partial mediation model.
In SPSS, when I calculate bivariate correlation among these three variables, the maximum correlation (say ...
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0answers
638 views
Pre-test, post-test multiple comparisons
This feels like it should be a very straightforward stats analysis but I'm struggling to find a solution.
I have a data set made up of pre- and post-test continuous data values taken from multiple ...
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2answers
143 views
CI for logistic regression
What does it means if no CI was given for binary logistic regression analysis in SPSS output?
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1answer
123 views
Dealing with multicollinearity by separating common variance
On this page, I read about multiple ways to deal with multicollinearity. I determined that the last method suggested may be best for my purposes. I copied it below:
Treat the common variance as a ...
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1answer
725 views
How do I interpret logistic regression output for categorical variables when two categories are missing?
I am using binary logistic regression; the dependent variable is 1 or 0; the independent variables are two groups: the first group includes continuous variables (...
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0answers
15 views
Relationship problem in multiple linear regression on SPSS [duplicate]
Possible Duplicate:
Why is there a difference in signs of regression coefficients of same variable in a simple regression and multiple regression on spss
When I perform Multiple Linear ...
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0answers
174 views
Why are these hierarchical linear regression results in R and SPSS different?
When I try to use the data and example for HLR from this example dataset taken from this post in the R Tutorial Series on hierarchical linear regression the results don't match when I try to use the ...
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2answers
294 views
Can Cox regression be used to assess the difference between two treatments
In this project our objective was to compare the revision rates between two surgical techniques. We have time to revision (time between two surgeries), demographics, and other variables we are ...
2
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0answers
64 views
mixed ancova or difference scores?
I am puzzled with how I should analyze the following data:
The dependent variable is respiratory sinus arrhythmia, a measure of parasympathetic activity (RSA). I have a $5\times5$ full factorial ...
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0answers
164 views
Comparing the results of one-way-ANOVA and two-way-ANOVA
I don't know how to interpret the results of my one-way-ANOVA and two-way-ANOVA.
I have 2 independent variables (s.b.'s trust in the internet="v_563" and internet usage(frequency) = "v_614"). I ...
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1answer
166 views
Mean regression factor scores and attributes cross tabulation yields. Why are all expected signs reversed?
I ran a factor analysis on 20 reasons for purchasing 4 different Goods. These are ranked on a likert scale from 1-5 with 5 being the "extremely important case", 4 important case, etc. I extracted 4 ...
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0answers
184 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:
...
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1answer
136 views
Using mixed variables in two-step cluster analysis
I need to perform cluster analysis on my data set which includes both continuous and categorical type of variables. Having read around, I think K-Means is not a suitable technique for mixed data. Can ...
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2answers
2k views
What am I supposed to do with negative Cronbach alpha
I have gathered data from 130 questionnaires and I have 30 variables.
Cronbach alpha is badly negative and I have Checked every thing I knew. But I saw no change in result.
please help me
SPSS file ...
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0answers
55 views
What type of Design is this?
Participants are asked to recall either a happy or sad event in their life.
Once a mood of happiness of sadness has been elicited all participants are then presented with 3 stories where the central ...
