IBM SPSS Statistics (formerly SPSS, i.e. "Statistical Package for the Social Sciences") is a proprietary cross-platform general-purpose statistical software package. [For SPSS Modeler, use 'spss-modeler' tag.]

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How to do post-hoc contrasts on within factor depending on certain between groups in SPSS?

Here are my experimental factors: within-factor (two levels): time1, time2. between factor (four levels): 4 groups. I want to test specific post-hoc contrasts comparing: group1: time1 vs. time2 ...
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2answers
842 views

What does accuracy mean in SPSS's automatic linear modeling output?

When running the Automatic Linear Modeling function of SPSS version 20, it will return an accuracy value. The higher the accuracy, the more predictive the model (I assume). However, what does this ...
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2answers
4k views

Multiple dependent variables in factorial design

I have a 2x2x2 factorial design with two dependent variables (lets say height and weight). I can examine the effect of the three factors for each dependent variable separately. But I also want to ...
2
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1answer
727 views

Running transformed data with a Generalized Linear Model in SPSS

I am running a generalized linear model in SPSS on data highly skewed to the right with a bunch of zeroes (average # caterpillars per tree species branch sampled) so I decided to use the Tweedie ...
3
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1answer
5k views

Does anyone have experience with IBM's “SPSS Modeler”?

SPSS Modeler seems like a great tool for data mining (especially for prediction etc.) but it is extremely costly for individuals like me (around 20,000 euros excl. tax). There is also a video. I am ...
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3answers
4k views

Does ensembling (boosting) cause overfitting?

I'm using SPSS Statistics Base 20. Using Analyze $\rightarrow$ Regression $\rightarrow$ Automatic Linear Modeling I've input about 50 variables. When using no boosting, the reported accuracy of the ...
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1answer
955 views

How to get last available row in SPSS?

I have the following column: Growth 0.1 0.5 0.23 . 0.5 0.67 0.23 0.42 . . . 0.12 0.20 Where dots indicate that there was no data available at that time. Now I ...
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1answer
2k views

How to import and run a model with SPSS?

I have exported a model using SPSS (it was generated by the automatic linear model generator). My question is simple but I cannot find the answer to it: how do I import and run this model from the ...
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1answer
775 views

Code to do Monte Carlo using SPSS? [closed]

Is SPSS command code available for doing Monte Carlo research? Thanks.
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3answers
661 views

Is there a limit to the SPSS random number generator?

Will the random number generator in SPSS be serviceable if I need 250,000 random numbers, or will the randomness start to degenerate? Asked another way, what practical limits are there to using the ...
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3answers
6k views

Computing average of data in multiple (different) columns in SPSS

I have a SPSS data file, which i am trying to reduce. However the data which belongs together is spread within multiple columns. I.e. I have one row per subject, but each subject has done multiple ...
2
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1answer
447 views

How to test changes in call volume over time?

I have carried out a study on change of call volume over a year (oct 07-mar 09). What statistical test on SPSS software can I use to show the difference in call volume on a day by day basis and on a ...
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0answers
2k views

SPSS Cross tabulation error messages when analysing a 3x2 contingency table

I would like some clarification on what I initially thought was relatively simple analysis. A single survey was given to 100 german show jumpers (horses) to complete What we would like to know is ...
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2answers
2k views

SPSS syntax to produce two-tailed test for regression

I have some syntax for SPSS and it produces everything that I need perfectly, although for some reason it spits it out one tailed instead of two tailed. Is there any way of editing this syntax so that ...
2
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2answers
6k 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
5k 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 ...
2
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2answers
5k 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
1k 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 ...
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1answer
202 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 ...
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0answers
466 views

Fitting generalized linear model with covariate

In our experimental design, we are assessing the effect of TMS on decision making. Our data is not normally distributed because our assesment test results in mean count data (ultimatum game). Besides, ...
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1answer
675 views

Non-parametric multilevel analysis in SPSS

I have a trial with 8 groups. Each group experienced one of two treatments - four groups got treatment A & 4 got B. Within each group, the dependent variable was measured 4 times. Unfortunately, ...
2
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2answers
1k views

Can I use log-likelihood distance on data of only continuous variables?

I have to run a SPSS two-step cluster analysis. All my 4 variables are continuous scalar standardized parameters (with normal distribution). The dataset includes 10,000 cases. SPSS suggest to use ...
3
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2answers
432 views

Half-normal distributed DV in generalized linear model

My dependent variable is, by origin, absolute residual* left after some regression; it is distributed half-normally. Now I plan to use Generalized linear model in SPSS (GENLIN) to regress it on some ...
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1answer
2k views

Z score transformation for testing group differences in correlations

SPSS Help provides the following help for testing group differences in a correlation, using the GLM approach. See link. It first requires that X and Y are transformed into z scores. Question: When ...
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4k views

How do you report Kruskal Wallis one way analysis of variance and post hoc results following APA 6th standards?

How do you report Kruskal Wallis One Way Anova and post hoc results according to APA (American Psychological Association) 6th ed. standards? I have tried to find a template for reporting the results ...
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4answers
10k views

How to edit features of a chart from SPSS in MS Word?

Is there any way to edit a scatterplot created in SPSS/PASW after exporting/copying and pasting it into a Word document. I am finding that when I copy and paste my graph from SPSS/PASW into Word, the ...
2
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1answer
201 views

Why might the means estimated by GLM ANOVA differ from those calculated by hand?

I'm currently analysing some EEG data using a repeated measures general linear model, and I've run into a problem. I have three within-subject factors; Scalp area (3), condition (2) and word (2). When ...
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1answer
907 views

Testing for validity of a formative measurement model

I have developed a formative model which tests the relationship between two composites. Obviously, I have to ascetain the validity of this model. I am told that Confirmatory Factor Analysis (CFA) ...
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2answers
1k views

Different F-ratios for within subjects effects when using SPSS and R's aov

I've just compared the ANOVA tables generated by SPSS and Statistica with the aov table provided by summary(aov.model). They yield identical between Subject effects (e.g., NativeLanguage(English vs ...
2
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1answer
3k views

How to perform repeated measures ordinal logistic regression using SPSS?

I'm usually a UseR. However, for didactic purposes I have to use SPSS today. I have to specify a General linear model with ordinal structure because what I'm examining is: Change in Likert scale ...
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2answers
1k views

Where can I find information about using SPSS for EFA and CFA? Is PCA (two samples) and reliability sufficient for scale development?

Context: I am in the process of developing a scale for my thesis. My advisor has guided me to using SPSS PCA to complete my analyses. Initially we reduced my scale to 3 factors (her insistence), ...
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1answer
17k views

Doing principal component analysis or factor analysis on binary data (using SPSS)

I have a dataset with a large number of Yes/No responses. Can I use principal components (PCA) or any other data reduction analyses (such as factor analysis) for this type of data? Please advise how I ...
3
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3answers
10k views

How to create multiple scatter plots in SPSS arranged in a table like format? [closed]

I have seen many reports which include (say) 6 scatter plots in one big table like format. Each scatter plot shows the relationship between two different variables. For example, one may show the ...
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2answers
2k views

Why don't my two-stage least squares results make sense?

I used SPSS 19's 2SLS procedure (which is very straightforward, with almost no optional specifications) to predict Y from X after X was predicted based on I, an instrumental variable. Then I tried to ...
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4answers
8k views

How to calculate an overall job satisfaction score and test group differences?

I am doing a project on finding out whether there is a difference in job satisfaction between employees of non-profit organisations and for-profit organisations. I also need to find whether job ...
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11answers
5k views

Best way to get started with and learn R

I have tried several times to "go it on my own" - but with limited success. I am a casual SPSS user and some SAS experience. Would appreciate a pointer or two from someone who has similar background ...
2
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2answers
2k views

Imputing missing data for Likert scale variables

I am in the process of imputing data (two variables that are 3 point Likert type responses and items of both variables yield multiple subscales). While these variables are ordinal variables, given ...
2
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1answer
16k views

How to read result from Kolmogorov-Smirnov one-sample test in SPSS?

I'm newbie and bit lost... Can someone help me read this result from SPSS 1-sample Kolmogorov-Smirnov test (poisson distribution). ...
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1answer
3k views

Controlling p-value in SPSS

I have corrected my alpha level using Šidák correction to take into account the experiment-wise error rate, as I am doing multiple correlation tests using the same data set. My new alpha is 0.00056. ...
8
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2answers
13k views

Understanding repeated measure ANOVA assumptions for correct interpretation of SPSS output

I am investigating whether different reward conditions may affect task performance. I have data from a small study with two groups, each with n=20. I collected data on a task that involved performance ...
0
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1answer
1k views

How to carry out repeated measures ANOVA?

I have the following data: IV = 2 levels (Experimental Group + Control Group). DV = I'm using signal detection variables i.e. (Hits, CRs, FAs & Misses) Both groups were tested twice so ...
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2answers
1k views

Is SPSS giving the wrong residuals for a repeated measures design?

When running a repeated measures ANOVA in SPSS, it's possible to 'Save' the residuals as new variables in the data editor. But the values output do not match the residuals given in R, and seem to be ...
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3answers
2k views

Seasonal data forecasting issues

I have a seasonally decomposed data set. The data set has strong seasonality. Now I am trying to fit the 'seasonal part' of dataset into ARIMA model and tried to forecast (with SPSS). The problem is,...
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1answer
2k views

Using an If condition inside SPSS syntax

I have a data table where I need to calculate the number of days each user performs an action. The structure is like this. ...
2
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0answers
378 views

How to test for differences from baseline where dependent variable is non-normally distributed using SPSS?

I have some physiological measurements which consist of 4 events measured in a "during task" condition and preceded and followed by a rest period. I want to test that the data points immediately ...
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0answers
351 views

How to use PCA+varimax components as independent variables in regression in SPSS? [closed]

I want to use body measurements to predict body weight in broiler chickens. There were seven body parameters measured. I did a principal components analysis and three components were extracted after ...
2
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1answer
5k views

Types of inverse transformations

In performing an inverse transformation to correct for skewness/kurtosis in SPSS, it asks me to choose what "type" of inverse transformation and I have no idea what the differences between these ...
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1answer
4k views

“Object not found” error in gls

As the R very beginner I'd like to ask if anyone could help me with the following problem? ...
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5answers
59k views

When is R squared negative?

My understanding is that R squared cannot be negative as it is the square of R. However I ran a simple linear regression in SPSS with a single independent variable and a dependent variable. My SPSS ...
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0answers
102 views

Reporting the general perception of tested sample [duplicate]

Possible Duplicate: Working with Likert scales in SPSS I have a data sample of which recorded individual's perception on whether a specific option is viable or not. The data was recorded on a ...