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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Remove estimated effect of independent variable on dependent variables (interval/ratio) using linear regression

Question: Can we use unstandardized coefficients derived from linear regression to remove the effect of an independent variable on the dependent variable? I have a large dataset and suspect that an ...
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28 views

Interpreting Binary Logistic Regression

I am using SPSS to analysis a specific outcome (Y or N) after three different types of interventions (3 Groups). Using crosstable and chi-square I get a highly significant result with rates of outcome ...
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49 views

Multiple imputation in SPSS: Excessive iterations to converge?

I am doing multiple imputation in SPSS 23 to deal with missing data before running hierarchical regressions. I ran Ender's diagnostic macro which calculates Gelman and Rubin's PSR (potential scale ...
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1answer
56 views

How to Exclude Lower Order Lags from a Custom ARIMA Model in SPSS Forecasting Module

I'm trying to use an ARIMA model to generate forecasts using monthly revenue data that exhibits both trend and seasonality. I've used the Expert Modeler from the SPSS Forecasting Module to determine ...
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15 views

Multiple Regression approach and ANCOVA approach to check for homogeneity of regression slopes

Hi i have a mixed design set of data with one continuous variable of satisfaction with 2 levels (pre- & post-) and one categorical variable of Service with 3 levels (S1, S2, S3). When running ...
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1answer
153 views

ARIMAX Forecasting in SPSS vs. R

I'm using time series data containing both trend and seasonality. I also have 2 endogenous predictor variables that I would like to include in my model. In R I've used the forecast package to develop ...
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32 views

Test for comparing means of 3 measurements at 2 points in time

I want to compare the mean values of 3 measurements which were taken before and after a study. Measurements of specific vitamins were taken, e.g. vitamins C, D and iron, so I have 2 values for each - ...
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1answer
16 views

How to analyse differences in groups over time?

I have a data set which looks at the effect of diet on 3 different vitamin concentrations (eg. vitamin d, c, iron). There are two measurements for each vitamin - one at the start of the study and one ...
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1answer
216 views

Data normalization in SPSS statistics

I am analyzing the responses of a survey using spss statistics. I understand that I will need to do a Cronbach alpha first. But here is my problem: The first part of my survey is "Awareness" and ...
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1answer
104 views

How do I interpret interaction effects in an ANOVA?

I really need help interpreting interaction effects for my ANOVA output. Can I interpret anything, if they are not significant? For example I am testing the effect of internal and external corporate ...
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51 views

How do I report Helmert contrast when running ANOVA?

I am a German student, so my English might not be perfect. Sorry for that. I would like to know how I do report Helmert contrast. I ran a two-way ANOVA and I wanna write down my contrasts in my thesis ...
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1answer
19 views

Indication for potential mediation or moderating relationships

I want to run a regression with many variables. Besides the hypothesized direct relationships between IV and DV, there might be some moderating and mediating relationships (but I don't know which) ...
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2answers
32 views

Why would you use GLM Proc to predict group membership based on a categorical predictor?

Is there a “magic” number of meetings that a student needs to attend in a particular program that has a positive effect on 2nd year retention? University students, who are at risk of not being ...
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17 views

AVERAGES OF SETS

Am not really sure whether its handled in this field;but my question is: Suppose there are different sets of random numbers provided. Each set has exactly 16 digits ranging from 0 to 9,all randomly ...
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112 views

Is the ROC curve and estimated AUC from SPSS parametric or nonparametric?

I am using SPSS to generate some ROC curves, AUC and p values. According to SPSS manual, the AUC can be computed parametrically or nonparametrically. However, I do not see any option for that. There ...
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65 views

Iterative generalized least squares procedure in SPSS?

I want to test the 'poolability' of my data set for a logit regressions. Gatingnon and Reibstein (1986), proposed an iterative generalized least squares procedure to do so. Anybody has an idea how I ...
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43 views

How to check validity of 12 item questionnaire with a 7 point-likert scale against a 19 item questionnaire with a 4 point-likert scale

I have a 12 item questionnaire with 7 point-Likert scale (Perfectionism Questionnaire) and I would like to validate this against an OCD scale that has 19 items and 4 point-Likert scale. Additionally, ...
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25 views

SPSS Linear Mixed Models converging extremely slowly, 24+ hours [closed]

This is my first question here, I will do my best to not break any rules. My question is about Mixed Models in SPSS 19. I have used these models before with datasets n=2200 and my processing time ...
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2answers
85 views

Which statistical test should I use for my research proposal?

I am testing the effects of traditional mental health counseling versus culture specific counseling. Therefore, there will be two groups: one group that receives culture specific treatment and one ...
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35 views

In a linear mixed model what does the F value represent?

I am examining the output of my linear mixed model in SPSS and need to decide how to report my findings. I was considering just reporting the p-values. However, my supervisor wants me to provide more ...
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38 views

How to structure dataset and write syntax for mediation model with clustered data?

I have a dataset of 300+ students with teacher-reported data. There are 17 total teachers that reported data on the students. I would like to run a model that tests mediation where the mediator is a ...
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2answers
1k views

Friedman's test is very significant, but its post-hoc comparisons (SPSS) are not significant

I ran non-parametric Friedman's test for my data in the SPSS 22 and significantly rejected the null. That would mean that among the $k$ paired samples (3 in my case) there should be detected at least ...
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1answer
36 views

Which number should I use for In-between group analysis by using Fisher's exact test?

I have to find out if the baseline demographics have statistically significant difference between two groups. The project is about two groups of students, one intervention group and one control group. ...
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22 views

Which number should I use for In-between group analysis by using Fisher's exact test?

I have an assignment to find out if the baseline demographics have statistically significant difference between two groups. The project is about two groups of students, one intervention group and one ...
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37 views

Analysis of data with three categorical IVs, continuous moderator and continous DV

I just performed a 2x2x2 between-subjects experiment with continuous DVs. Due to the fact that the factors are categorical and the DV continuous, I believe that GLM might be best suited. However, as I ...
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11 views

Predictive measure of association in CART

In the article http://www.gad-allah.com/MBA%202010%20Ain%20Shames%20Univesity/Statistics/spss13/Algorithms/TREE-CART.pdf in p. Surrogate Split there is a formula for Predictive measure of association. ...
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30 views

Categorical dependent variable - multilevel modelling using SPSS

is it alright to run a multilevel model using a binary categorical dependent variable (0,1). The model is running fine, but is there a better way to deal with it? Many thanks!
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18 views

Conjoint analysis varying card responses

I conducted an online survey during a conjoint analysis. The task of the particpants was to rank several stimuli cards with a 6 point likerttype scale from not trustworty (score 1) to very trustworthy ...
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1answer
56 views

how to recode a “slider” question into a Likert scale in SPSS?

I have a battery of questions for which I used a "slider" option in Qualtrics (respondents can just drag a slider along a continuum to mark their answer), from 0 to 100. My problem is that I'd like ...
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31 views

Univariate Cox Regression with categorical variable in SPSS

I am running a univariate Cox regression on a set of patients. The variable Riskgroup is grouping patients in 4 groups. My code looks like this: ...
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15 views

Using Multinomial Logistic equation for outcome variable. Need help with SPSS

My outcome variable: How wise is it to attend college taking student loans: Options are 5 categories Very wise to Unwise. However, I'll treat them as nominals with 3 options Wise, Neutral and Unwise. ...
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1answer
48 views

Interpreting hierachchical cluster output

This is a dendrogram resulting from a hierarchical clustering using SPSS. I thought the clustering is done in the following way. I would like to know if the way I am interpreting is correct. ...
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1answer
10 views

Comparing the proportion of men accessing a service to the proportion of men in the local population

I am looking at whether men access a service proportionally. My data is nominal and consists of men accessing a service (3000), woman accessing the service (6000), men in the local population (99300) ...
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2answers
44 views

Detecting change in % responding to a question over time periods

A study has been asking the same ratings questions repeatedly year over year. Currently, the study is using a Column Means test in IBM SPSS Survey Reporter to compare the number of people responding ...
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16 views

Correlation between scale and nominal data in healthcare statistics [duplicate]

I'm a physiotherapy student looking for help with a project. Any help would be appreciated. Even signposting to some relevant resources would be great. Basically I have; A group of patients (n=90). ...
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17 views

Comparing SPSS regression to WEKA model outputs?

I am attempting some regression techniques using SPSS and weka In SPSS I can get the R R^2 Adjusted R^2 Std. Error of the Estimate. Weka outputs: Correlation coefficient Mean absolute error ...
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21 views

What specific Reliability measure can be used in SPSS when multiple scales are used?

I have a survey of 360 individuals. I asked them questions with different types of answers (scales). I have few questions with Yes/No, few questions with multi-categorical answers (types of ...
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1answer
86 views

Changing values of string variable with an if clause in SPSS [closed]

I have a dataset that looks like the one below. I will need to use both ID1 and ID2 to identify each row. The responses in the OpenText vary greatly. ...
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173 views

How to get standard deviation from estimated marginal means (lsmeans)?

I am trying to calculate adjusted means and standard deviation across groups of people according to age. Using SPSS, I use general linear model -> univariate, then calculate the means adjusting for ...
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23 views

Nonparameric mixed (split-plot) anova in SPSS?

All, I have a 4-within x 2-between split-plot (i.e., mixed ANOVA) design with data that are not normally distributed. The DV resembles count data, with mostly zeros and decreasing numbers of 1s, 2s, ...
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20 views

Comparing two independent variables using SPSS

How can I compare two independent groups using variables like weight, height, bmi and stratify them using age group at the same time? The table below depicts how the analysis will look like.
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46 views

Mediation Analysis using PROCESS by Dr. Hayes

I have one one concern regarding the range of confidence interval when I do a mediation analysis using PROCESS model 4 by Dr. Hayes. The result of the mediation analysis indicated that indirect ...
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39 views

Replicating or Approximating SPSS syntax for a longitudinal mixed model example in R

Could someone show how the following SPSS syntax for a longitudinal mixed model specification could be replicated (or approximated) in R? My dataset is "mydata." ...
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1answer
232 views

How to obtain the same varimax-rotated PCA results in MATLAB and SPSS?

I'm trying to perform a PCA Extraction + Varimax Rotation in MATLAB and obtain the same results as in SPSS. My data is the following matrix A: ...
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131 views

A categorical PCA (CATPCA) question

I have a dataset that I am analysing using CATPCA in SPSS. The problem that I have is that while I can see the variables that are positively or negatively correlated on the Component Loadings table ...
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43 views

Correspondence Analysis - Marketing - Respondent Ideal Points

How would you show respondent ideal points for a related question in the same survey? Specifically, how would you chart each respondents' ideal attribute groupings along the same dimensions created ...
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100 views

How to graph continuous independent variable and logit of dichotomous outcome in SPSS

First question: I am using SPSS, and I want to graph the logit of my dependent variable on the y axis and my continuous independent variable on the x-axis. I am interested in visualizing the ...
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1answer
1k views

How can I calculate the AUC of combined variables using SPSS

thank you for taking time out to read this. I have previously ran ROC curves to get the AUCs for single test variables but I do not know how to derive the AUC for combined variables (2 test ...
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1answer
52 views

What statistical analysis is appropriate for a before and after design (where participants are not necessarily the same people)

I am trying to figure out what is the best statistical analysis for my data. I looked at two companies in timepoint 1 (baseline) and timepoint 2. Company A did an intervention, Company B did not ...
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95 views

Likert scale in SPSS analysis

my study hypothesis is that patients perceive their antiretrovirals treatment differently as opposed to their cotreatments and have better adherence to their antiretrovirals than to their ...