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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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replicating SPSS confidence intervals with R [on hold]

Consider this SPSS command ...
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2answers
65 views

Time Series Forecast / Transfer Function

I'm trying to interpret the forecast values from an ARIMAX function, and I'm confused about what's happening in the actual forecasted values as I change the values for the predictor during the ...
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Insignificant t test or MW U test yet high ROC AUC and vice versa

In SPSS, when I conduct a Student's t test or Mann-Whitney U test on (lots of) variables when comparing between 2 groups, some differences are denoted significant, and others aren't. When I conduct ...
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How to Control the Type-1 Error Rate for T-Tests Used to Understand Sig. Interaction Effects

Basically, I ran a repeated measures ANOVA between groups R and D with one within-subjects factor with 2 levels. A significant interaction was found. To understand what was driving the interaction I ...
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Has anyone used SPSS to do one-with-many analysis with MLM? [closed]

I have collected data from patients and doctors to be analyzed by a reciprocal one-with-many analysis. The outcome is patient-rated and doctor-rated trust in their relationship. And quality of ...
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SPSS identification restrictions on EFA models

I am trying to understand the restrictions used by SPSS to identify EFA models using ML extraction. FOr example the GFI for a 2 factor model of 8 items (shown below) has 13df I understand to identify ...
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9 views

Regression Equation when multiple DV's (varying years)?

I have a research question that is asking how perception of quality change over time. So participants answered what they believed quality is at Year 1, Year 5, Year 10, etc. How do I create a ...
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SPSS Syntax - Computing variable if a certain number of variables meet a given criteria

I have a question regarding syntax for recoding multiple variables into a new variable in SPSS. The set-up: I have 7 dichotomized variables (VAR1X, VAR2, VAR3, VAR4, VAR5, VAR6, VAR7) and want to ...
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1answer
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Interpreting non-significant regression coefficients

Out of seven, six of the independent variables (predictors) are not significant ($p>0.05$), but their correlation values are small to moderate. Moreover, the $p$-value of the regression itself is ...
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2answers
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Negative estimated means in Poisson regression output

Can anybody help me understand what the negative estimated means in a Poisson regression mean? I am trying to model the count of damages during transit for 4 different logistics providers. To make it ...
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1answer
44 views

2-way ANOVA in Python statsmodels yields different Sum of Squares than SPSS

I am learning to use Python for my statistical analyses, and while figuring out how to perform a 2-way ANOVA with statsmodels I found that my Python code yielded slightly aberrant values. Comparing ...
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27 views

How does SPSS “standardize” variables for discriminant analysis?

We are trying to reproduce the outcome of a discriminant analysis done in SPSS and run into a mystery. This link: https://stats.idre.ucla.edu/spss/output/discriminant-analysis/ explains that ...
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28 views

Binary logistic regression with coupled independent variables?

I'm new to Logistic Regression and need to determine whether its valid for independent variables that are strongly coupled. Investigating, I created a fictitious sample set of sports fans to test the ...
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SPSS KMeans Clustering Output Drastically Different than Scikit-Learn KMeans

I am clustering a rectangular data set with 82 records and 2 columns (a date and an integer between 1 and 2). The goal is to cluster dates that are close in proximity automatically in a way that ...
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8 views

Signs in SPSS's PCA with rotations with the FACTOR algorithm

I am trying to reproduce the results of the PCA with rotations from SPSS in python. But there is some information I didn't find in their documentation. I am trying to do the PCA like in the FACTOR ...
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2answers
87 views

Is a Fisher's Exact test in a 7x9 contingency table feasible?

I have a question regarding the use of SPSS (i.e. its capability) to execute a Fisher's Exact test for large, sparse RxC contingency tables. I would like to test whether or not a certain correlation ...
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Mediation paths significant, yet no mediation

I am using Process by Hayes to run mediation in SPSS. I am using model 4 and have added five covariants. The results show that the pathways are significant a (p .0211), b (p .0159), c (.0395). Yet, ...
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Pearson correlation after principal component analysis and varimax rotation

Is it possible (or does it make sense) to check for correlation after varimax rotation, since varimax assumes that there aren't any correlation between factors (or components)?
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Covariate selection for GEE (R)

Using geepack, I fit the model: ...
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Are forecasts from SPSS Time Series Modeler transfer functions ex post or ex ante?

I've fit a transfer function in SPSS Time Series Modeler from a training set and output the predictions. I get predictions for both my training set (which was used to produce the model) and my test ...
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28 views

Logistic Regression Box Tidwell Large Sample

I am doing a logistic regression (binary DV) with 13 IV. As a first step I wanted to test the linearity assumption bw. the IVs and the logit. To do this I applied the Box Tidwell Method in SPSS by ...
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What does a negative denominator term mean in an SPSS ARIMA transfer function?

From the discussion here: Transfer function in forecasting models - interpretation I have the impression that a negative denominator coefficient for a predictor variable in a transfer function would ...
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1answer
11 views

interaction between 4-level categorical variable and a continuous moderator

I'm trying to find a way to investigate whether religiosity correlates positively with helping other people, and whether this correlation is different depending on a 4-level manipulation (in my design,...
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What does 'Error(var)' in ANOVAs with repeated measures means? How is it calculated?

I checked several tutorials, books and online resources, but still I do not know what 'Error(var)' in Anova with repeated measures come from? How is it calculated? I see that number of measures ...
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Statistical test for comparing the performance of two methods using absolute differences

I am doing a study where I have to compare tumor sizes measured using two different methods with the real tumor size. What I want to prove is that the absolute difference between method 1 and real ...
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SPSS syntax - computing drop out in surveys [closed]

I am new to using syntax in SPSS and was wondering if someone could help with the follwing. I have two different questionnaires in one database - introversion (10 items; eg. T0_In_1, T0_In_2,T0_In_3, ...
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37 views

Interpreting coefficients from SPSS ARIMA Model Parameter Table

I'm trying to figure out how to make a prediction equation from the coefficients of an SPSS ARIMA model parameter table. Based on what I understand of the backshift operator notation, I've written ...
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How should the variable 'grade level' be treated? (ratio vs ordinal)

I am currently inputting data into SPSS and got stumped on one of my variables, grade level. For the purpose of our study we are looking at children in grades k-12, where specific grade is important. ...
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21 views

Marginal model in R and SPSS

I have 2 datasets which i analyze both with R and SPSS (for professional reasons). Specifically, i use a marginal model with an AR(1) covariance structure. I have 2 covariates, namely the main effect ...
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Confidence interval of median difference, SPSS

Despite some great help on here I'm not 100% sure about calculating 95 CIs for median difference. This is my procedure at the moment. I've got a repeated measures design, so behaviour of animals in ...
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76 views

P value equal to 0.000 in every test: how is it possible?

I have 8 variables for which I have to examine whether they have a normal distribution or not. There are 270 observations for each variable. I've run a normality test on SPSS for each variable and all ...
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1answer
115 views

T test two data set 3 variables per data set, can be used? [closed]

I have two data sets (two different countries), and for each data set I have 3 variables: 2 independents (years and car model), 1 dependent (sales) To make it more visual it would look something like ...
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28 views

Intuitive explanation of the Wald Chi-Squared Test

I am having trouble understanding what the Wald Chi Squared test is used for intuitively. SPSS uses the Wald Test (type III) in the "Tests of Model Effects" box when I run my GEE models, but I don't ...
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Stuck on which statistical test to use…? (SPSS)

I’m currently analysing some data that I have collected in my postgraduate research and I am struggling to nail down which statistical tests I need to use. I conducted a study on treatment seeking of ...
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1answer
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Two-way repeated measures anova using a “categoryish” independent variable?

I am trying to run a two-way repeated measures anova in spss but i think my data needs restructuring. I have run anova's in spss before so i am familiar with process. The problem is that when i have ...
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Is mixed models a better choice comparing to ANOVA? (SPSS)

I have two groups in which I compare two times (before and after treatment). At first, I tried an repeated measures ANOVA and observed significant difference between groups. However, I have the ...
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1answer
46 views

Interpreting ordinal regression with categorical predictors in SPSS

I am running an ordinal regression in SPSS, with a categorical predictor (9 neighbourhoods) and an ordinal dependent (satisfaction, with three levels: 1 '(very) satisfied' 2 'not satisfied, not ...
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Adjust correlation for categorical variable

In setting up a model that predicts a continuous outcome variable based on a continuous input variable, I was wondering whether I could adjust a (partial) correlation for a categorical variable (e.g., ...
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Interpreting results of ordinal logistic regression - ordinal dependent variable with 5 levels and continuous predictor variable

Using SPSS, I have run a generalized linear mixed model for repeated measures longitudinal data on an ordinal target variable: duration of hallucinations with levels of 0= "N/A" (no hallucinations), 1=...
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1answer
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Two between factors in repeated measures ANOVA

"Can i put two binary variables in the between factors part of the repeated measures ANOVA?" Participants: Patients, Healthy Controls Task: All participants do a task (Pre intervention Score). Then ...
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GEE model issues and interaction interpretation

I am doing my first data analysis and I am confused with some results - let me know if you need any more information to answer this (and thanks a lot!)! In our experiment we collected binary (accept/...
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Should this be a one-way repeated measures anova?

I'm a new phd researcher and i just completed my first set of experiments. Participants played the same game using three different control mechanisms. In the game they had to complete a series of ...
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GLMM for non-normal nested data (SPSS)

I have a dataset which is quite complicated to me. The data is nested; multiple measures within the same person. Therefore no ANOVA, but GLM/GEE. However, my independent variable is not normally ...
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Effect size intepretation

-Within-subjects design -30 subjects, counter-balanced. -Free recall study (are concrete words better for memory than abstract words) -Two minute distraction task after memorization and before recall -...
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How to Interpret Parameter Estimate Output from SPSS [duplicate]

Dear Community Members, Given the outputs of the SPSS analysis, how can the exp (B ) and Beta values be interpreted in terms of odd ratio ? and in relation to how the independent variable affects the ...
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1answer
204 views

Getting 1-tailed p value from a 2-tailed p value in SPSS v23

For the purpose of my research, I use IBM SPSS and would like to get paired t-test result with a 1-tailed p-value. This video states how to derive a 1-tailed p-value from 2-tailed p-value, however, ...
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1answer
55 views

Calculating effect size + 95 CIs for median differences (SPSS)

I've got a mixture of parametric and non-parametric data, with a repeated measures design; measuring animal behaviour in three different treatments. For parametric data, it's simple enough calculating ...
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1answer
21 views

5-way significant interaction with mixed-ANOVA, how to interpret!? (SPSS)

I am analysing results from a study which was a 2 (stimulus type) x 2 (distance) x 2 (speed) x 2 (cardiac cycle) x 2 (grouping variable-between subjects) mixed ANOVA, all of the factors have 2 levels ...
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Questions about Bonferroni and power statistics

Thanks in advance for taking the time to read my questions. In a project of mine, I have performed a vast series of regression analyses (one for each measuring point, if which there are many). With ...
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BCa intervals in Pairwise comparisons SPSS

In SPSS after a Two-way ANOVA analysis I have performed Pairwise Comparisons for main effects. The fact is that BCa intervals are not inversely the same when is comparing for example A-B (-2.156,5.613)...