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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1answer
200 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 ...
0
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1answer
896 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) ...
3
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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 ...
2
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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), ...
13
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1answer
16k 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). ...
1
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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
998 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 ...
4
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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 ...
0
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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 ...
1
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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
377 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
348 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 ...
3
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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? ...
31
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5answers
56k 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 ...
0
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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 ...
4
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2answers
3k views

Multiple imputation on single subscale item or subscale scores?

Recently I am conducting a research on the relationship between motivation/attitude variables (Gardner's model) and English language proficiency in the Philippines. I encountered a problem: missing ...
2
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4answers
1k views

What's the appropriate spss test?

Context I have 25 men and 25 women as participants, and they did exactly the same thing: Each of them heard an attractive dialogue and they had to choose between a photo of a woman in red and a woman ...
1
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1answer
940 views

Detect multi-punch responses in SPSS syntax?

I have a dataset that includes an open-ended response that was coded into categories by a vendor. The vendor created 50 multi-punch categories stored as 50 true/false variables. By putting this in a ...
2
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2answers
205 views

What distribution function might describe the following statistical experiments?

I have made several experiments, the result graphs are below, I need to figure out what is the distribution function of the following random variables... Where do I start with statistical analysis of ...
0
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1answer
1k views

Assigning class to the cases after K means cluster analysis (SPSS)

I have carried out PCA and then clustered the 6 resultant components using K-means clustering technique using SPSS. Normally SPSS adds a class variable for each case indicating its assigned group. ...
0
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0answers
495 views

k-means quick cluster analysis error in SPSS

I am doing a k-means cluster analysis for 6 component factors obtained by PCA. For centers and seeds, I have carried out a hierarchical cluster analysis. When I run the k-means cluster analysis, i get ...
0
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2answers
717 views

What test do I use / how do I show in the analysis that I measured everyone twice?

I have already asked a question on this forum about this, but as I changed my experiment a bit and I am still confused. I conducted an experiment in which 25 men and 25 women listened to an ...
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2answers
654 views

Interpreting average linkage clustering results in SPSS

I am trying to cluster 6 PC scores for a 1600 cases data (so its a 1600 x 6 matrix). I am using average linkage clustering technique that would be followed by a K mean clustering. The purpose of ...
2
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0answers
329 views

Multiple imputation using SPSS

I am working with a database with missing data. I have done "Roderick J. A. Little’s chi-square statistic" and knew that my data are not MCAR. However, I know don't have can I determine if there are ...
3
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1answer
2k views

Calculating principal component scores after PC analysis

I am carrying out a study to find out meteorological patterns using daily met observations including around 30 met parameters (each day is a case with 30 variables). My methodology includes carrying ...
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2answers
2k views

Forecasting stock prices time series based on independent factors using ARIMA model

I am trying to forecast time series of stock for a particular case in which closing value of the stock depends on independent factors which is in which infact another time series. Situation is like I ...
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3answers
3k views

How do you apply a linear regression built in SPSS to new data and generate prediction intervals

I am trying to use SPSS to build a linear regression on historical data (dependent and independent variables) and then apply this to new data (independent variables only) to generate predicted values ...
2
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0answers
972 views

How to perform Fisher exact test in SPSS?

I've collected around 10 numbers of ants from a colony and introduced the same numbers of ants to the same colony (say Colony-1) at their entrance to see their behaviour (whether they accepts or ...
8
votes
4answers
277 views

Internet statistics resources suitable for psychology students doing research

I am working on a new webpage for my part-time job as a methodological/statistical consultant for (psychology) students at my university. On this website I would like to place several links to online ...
1
vote
1answer
888 views

Why is a regression model of portfolio return giving smaller adjusted R-square (i.e., negative) than expected?

I have a question for adjusted $R^2$ given a specific regression model. I am doing a project on January effect and I have a model from some journal using $$R_i = a_0 + a_1D_{\mathrm{Jan}} + ...
6
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1answer
127 views

Getting an average measurement based on two raters for cases where data is missing for one rater

Context: I'm investigating behaviour in a clinical study involving children. I had both parents and teachers completing questionnaires to inform an understanding of the same underlying constructs, ...
4
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1answer
4k views

Factor analysis problem — singular covariance matrix?

I'm having trouble performing factor analysis on my dataset. When I perform the factor analysis in SPSS (default settings), it works fine. Problem is, I need to do it programmatically (in Python). ...
2
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1answer
668 views

Can SPSS perform chi-square test on an existing contingency table?

I understand that SPSS can create a contingency table, and at the same time perform the chi-square test. However, is it possible that when we already have the contingency table, to have SPSS do the ...
1
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3answers
13k views

How do I create subscales based on sets of items in SPSS

I have a 37-question scale, where each item belongs to one of four scales. The items for each scale are interspersed. How can I compute a scale score for each of the four scales? I need to be able ...
1
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0answers
2k 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 ...
2
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2answers
549 views

How to examine group differences on several 5-point items using SPSS?

I am trying to analyse a group of 4 questions that are on a 5 point scale. I need to group the answers for each question based on age. There are three different ages. How would I go about doing ...
2
votes
1answer
377 views

Variance based on given frequencies using SPSS

I'd be too happy, if someone could post a code snippet, which explains how to compute mean and variance of a set of records, which contain frequencies? Suppose we have records like (FORMAT F) ...
8
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1answer
4k views

Unexpected singularities in the Hessian matrix error in multinomial logistic regression

I have been doing multinomial logistic regression analysis using SPSS 19. I have encountered the following problem when I run the analysis procedure: "Unexpected singularities in the Hessian ...
2
votes
2answers
992 views

How to get a redundancy index when performing canonical correlation analysis in SPSS?

I am trying to perform a canonical correlation analysis to investigate the relationship between attitudes (14 variables), perceived consumer effectiveness (6 variables) AND Intention to dine (DV) 14 ...
1
vote
1answer
22k views

Working with Likert scales in SPSS

I performed a survey using a Likert 1 to 5 scale (totally agree/agree/neutral/ disagree/totally disagree) on 12 questions which are split into 3 statements which the respondent places a value of ...
4
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1answer
228 views

How to assess differential risk of disease across three groups after adjusting for other risk factors?

I have 3 different groups: A, B, and C: A (has a medical condition) has 30 entries B (another medical condition) has 31 entries C (control group) has 55 entries All participants have information ...