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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Factor Analysis_number of factors in the suggested model is larger than in SPSS"s result

Based on the previous theories/research results, I build up my model research which includes 12 variables (11 variables are measured by at least 3 items for each of them, and a single item is used to ...
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21 views

What measurement level would binary data be?

I'm using decision trees on SPSS, and I'm not sure what measurement level my data should be in. The variables I am modelling are binary (0 or 1), and I don't know whether that would be classed as ...
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20 views

is it necessary to create dichotomous dependent variables to test for proportional odds for ordinal regression?

I have a data set that contains variables collected using a set of likert scales. I want to do a separate ordinal logistic regression with age, gender, and income as the independent variables and each ...
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1answer
53 views

Negative Binomial dispersion parameter in SPSS

I am working in accident prediction modeling and I'm using SPSS Generalized Linear Model procedure with Negative Binomial distribution and Log Link Function. Does anyone know the form in wich SPSS ...
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17 views

Hierarchical Multiple Regression & Partial or Semi-partial correlation

When conducting a hierarchical multiple regression, I understand that all covariates are entered into the first step in order to control for them. However, does SPSS control for the covariates using a ...
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1answer
42 views

How to perform ordinal regression with rank-based dependent variable?

I have a dataset I'm about to use for some preliminary testing. However, I've stumbled onto a puzzle which I cannot seem to figure out. ...
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12 views

Negative Cronbach's Alpha

I run the Cronbach's Alpha based on the result of the Exploratory Factor Analysis, and 5 factors found. 1st is positive with Alpha, 2nd is low with Alpha, 3rd, 4th and 5th are having the negative ...
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1answer
6 views

Variables in the measure column

This may sound a simple question but I just want to confirm. Is ID of participants continuous, nominal or ordinal data?
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1answer
58 views

How to handle empty data in linear regression?

This question may seem like a duplicate but I haven't found quite another one that fits my case. So I am trying to run a linear regression on some variables including 1 dichotomous IV (Tool) that is ...
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14 views

violation of independence assumption for comparison of means

I have a binary dependent variable (following a pattern by my subjects or not). I want to test the relationship between a characteristic of subjects (i.e., personal innovativeness) - categorized into ...
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20 views

Multiple imputation in SPSS with PMM does not result in imputation of observed values

I'm running a multiple imputation in SPSS version 23 and have chosen PMM (Predicitive Mean Matching) as method, which should result in imputed values matching an observed value but it does not as ...
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1answer
31 views

change scores as predictor variables in a repeated measures multilevel model

I am using SPSS mixed to create a longitudinal multilevel model. Level 1 is observations and Level 2 is participants, so observations are nested within participants. I have multiple continuous and ...
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1answer
38 views

Reverse Code for Factor Analysis

I have done my survey, and now I need to do the data analysis. However, I am not sure whether or not I need to do the reverse code at the first step before I can do the remaining analysis. There are ...
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15 views

Multiple regression: forcing y-intercept=0 improves R^2, is this correct/possible? [duplicate]

I have been running multiple regressions in Excel successfully (using the Data Analysis Toolpak) but when I run the same regressions and force the y-intercept through 0, the R^2 values are very ...
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15 views

What does it mean if your Mean Squares and F value are very similar?

I am running three separate MANOVAs in SPSS. When I run my tests the results for the tests of Between-Subjects Effects shows that my Mean Square and F are very similar across all the variables I am ...
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60 views

Two-way ANOVA in spss; how to activate “Equal variances not assumed ?”

I got a good solution from the previous question at here and was very helpful. I'd like to say thank to Horst Grünbusch again for his kind help. Following is the previous question; Two-way ANOVA for ...
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1answer
186 views

Two-way ANOVA for data with homogeneity of variance is violated

I'm currently doing a biomechanical tissue study and want to run a two-way ANOVA. Here is how my data look like: Independent variable #1 : Treatment or Non-treatment Independent variable #2 : ...
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3answers
72 views

Regression coefficients seem to have the wrong sign; can I force them to have a specific sign?

I'm working with some real world data and the regression models are yielding some counterintuitive results. Normally I trust the statistics but in reality some of these things can not be true. The ...
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18 views

Specifying an HLM model in SPSS (ranking data)

In SPSS, I am receiving the error: The final Hessian matrix is not positive definite although all convergence criteria are satisfied. And when looking at the output, it is telling me that the ...
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20 views

SPSS Autocorrelation, Cross correlation, Mulitple Imputations [closed]

I'm wondering if someone can help? I want to combine multiple imputed data sets. Is there a way to determine the pooled autocorrelation coefficients and standard errors in data where there are 10 ...
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1answer
47 views

p value in SPSS correspondence analysis

When I did a correspondence analysis to two ordinal data variables with each having six categories I get this table from SPSS. What does this p value indicate? Does this mean there is no ...
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1answer
38 views

Interpreting biplots in correspondence analysis

I am reading the book by correspondence analysis in practice by Michael Greenacre.It has the following example. How do we find what row profiles are associated with column profiles. In the book it ...
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83 views

outliers in Likert-sacele data

I have some data with Likert scale (1-5). In the boxplot, SPSS report some outliers (although the value is within the 1-5 range). As I read so far, removing outliers on Likert scale data is arguable. ...
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20 views

Three-way ANOVA with repeated measures

I want to know where to place independent variable that is repeated for all observations, that has three levels. I have five observers that ranked their stress level in different conditions (12 ...
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1answer
21 views

Repeated measures ANOVA or MANOVA (SPSS)

Statistical help needed. I have an experimental design of two independent groups (pregnant/non-pregnant), in which each person has described past memories and future episodes on different variables on ...
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11 views

Can we multiply two observed items and use the composite item as single input variable for CFA/SEM analysis

Please tell if I can multiply two observed items and use the composite item as single input variable for CFA/SEM analysis. What term is used for this act of multiplying of items in SEM lingo (like ...
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1answer
36 views

Analysis of count data (density per area) using Generalized linear model

We are applying a GzLM (using SPSS) for analysing the effects of two fixed categorical predictors (habitat type (2 levels) and seasons (4 leves), and their interaction, on data regarding counts per m2 ...
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19 views

spss, how to enter the covariates for adjustment..?

I Spss, how do you Adjust for two binary variables, "gender" and "age" (<24 >23)? The primary covariate is a continuous variable with a binary dependent. Is it correct to insert age * gender or is ...
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13 views

Correlations between nominal data with multiple options

I would like to investigate which genetic variations appear with a higher frequency on one (left OR right) or both sides of a tumor (left AND right) within an array of different patient samples. ...
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1answer
19 views

Categorical data comparison

I've been struggling with the following problem and I am not sure if I am using the right statistical method. Namely, I am analyzing passwords characteristics from a questionnaire and from real ...
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19 views

Trying to run ANOVA with time variables

First, can I do this? I never learned of using hours:minutes:seconds as ANOVA values. Second, out of my 3 groups, only one is normal and no transformation will work (can I even use transformation for ...
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2answers
37 views

ANOVA possible?

I have 2 groups (variable = condition) Control, Experimental - I have coded them as 1,2 in SPSS. I have measured these at three time points - pre, ret1 ret2 (currently just a string variable) I have ...
2
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1answer
61 views

chi squared with proportions

We want to know whether there are any differences in the location of mole hills that occur in two fields. We have been looking at the distance from a fence that mole hills occur. We have separated ...
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1answer
20 views

nominal variable (fixed actor) only relevant to a subset of data in SPSS / GLM

An example to illustrate the question I have: Suppose Strength is a function of gender (male/female) and, AMONG MALES, testosterone level (low, medium, or high). I don't care about testosterone ...
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47 views

2x2 moderated mediation model - how to build the moderator?

Hello friends of statistics, first of all I want to excuse for my bad english skills. Nevertheless I need your help :) My Design: IV-1: social status of person, IV-2: public vs. private shown ...
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1answer
32 views

Binary Logistic Regression with multiple binary and ordinal independent variables

In my data set I have one dependent variable (dead or alive) and 37 predictor variables. 35 of my predictor variables are dichotomous (Obese: 1 or 0, Female 1 or 0, etc), however 2 of my variables are ...
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32 views

Performing PCA on a tetrachoric matrix in SPSS

I am currently working on a project where I have nine dependent variables, each binary, measuring similar outcomes. Accordingly, I'd like to perform a principal component analysis on them to reduce ...
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37 views

Problem with number of dimensions in a correspondence analysis

I got 3 variables: X: numbers between 0-40 Y: numbers 0-1 Z: numbers 1-3 Each variable include 1000 samples. I would like to perform the analysis between [X, Y], [X, Z], [Y, Z] I use the same ...
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28 views

How to conduct a Generalized LM in SPSS, with proportion dependent variable

I must deliver some analysis result report, by using a Generalized Linear Model for a dependent variable I have, which is in proportion values (invisibility), with two factors. The first factor is a ...
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44 views

SPSS: GLMM and(adjusted) odds ratio

I am performing a retrospective study and the relative statistic analysis. I am studying the the risk factors for the occurrence of complications during medical procedures. I have 50 subjects ...
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0answers
12 views

SPSS Mixed model with imputed data and model LLC scores

I am supposed to build several models (it is multilevel analysis of students from different schools). I used multiple imputation for missing data after running MVA and pattern analysis. Now I have 5 ...
2
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30 views

DFA in SPSS: Sorts effectively, but Box's M is still 0.000. Is the analysis worthless?

I am a geologist attempting to apply the discriminant function analysis to surface features I have mapped in ArcGIS. At the moment I have 4 dimensionless sorting variables calculated for each feature, ...
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42 views

10-fold cross validation of a Multinomial Regression Model SPSS 20.0

I have a set of 125 people that belong to one of four nominal categories. Each person is described with 7 descriptors with 2-5 nominal variables that I use in my regression model to predict the ...
3
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1answer
192 views

Adjusting for confounders when comparing means with t test

In an article I found recently they were able to compute the difference in means of two groups (presumably with a t-test) while adjusting for confounders; they called this the aDiff (adjusted ...
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1answer
27 views

Different results when conducting regression and ANCOVA in SPSS [closed]

I'm conducting a regression analysis with two binary categorical variables and one continuous variable as independent variables. From my understanding, the results should be identical as the results ...
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1answer
129 views

PROCESS macro in SPSS - Analysis for multiple IV?

I have a moderated mediation model with 4 IVs, 1 mediator, 1 moderator, and 1 DV. I can't find the right model in the templates provided by Andrew Hayes for his SPSS PROCESS macro. Can I carry out one ...
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33 views

Trying out a Leave-one-out cross validation and I'm not sure what to do with the output

I'm very new to cross validation, but I'm submitting some regression models as part of a paper and the reviewers are requesting it. I used the method listed here on a regression model with 200 ...
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37 views

Generalized Linear Model on SPSS with the 'error': “set to zero because this parameter is redundant”

For my dissertation I have a lot of data and many nominal variables. None of my data is parametric. I tried transforming some of the percentage data with arcsine because it was in proportions and the ...
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1answer
21 views

Problem with Wilcoxon test in SPSS

I have a question about Wilcoxon test in SPSS. For a work in my university i have to test 2 results of metrics applied in 2 algorithm (A2-NSGA3 and NSGA2), the results are as follows: ...
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29 views

CATPCA Missing values

I have posted a question on stackexchange and you answered me very well before. Thank you. I have another CATPCA question and I want to ask to find out how missing values are used if you select ...