Questions tagged [spss]

IBM SPSS Statistics is a statistical software package. Use this tag for any on-topic question that (a) involves SPSS either as a critical part of the question or expected answer and (b) is not just about how to use SPSS.

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Interpretation of negative coefficients in ordinal regression in spss

I have built an ordinal regression (logit) in the spss for data in the likert scales. I put the independent variables into factors, not covariates. As far as I understand, this should be done with ...
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Multiple imputation of longitudinal data in SPSS

I'm attempting to analyse a longitudinal, retrospective dataset with measurements at various time-points. The data-set has a significant amount of missing data, up to 30% for the main outcome variable,...
R.A. Been's user avatar
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SPSS Multicollinearity Binary Logistic

Just a quick one - I am running a binary logistic regression in SPSS and I wanted to check the VIF for multicollinearity. How do you do this when the dependent variable is binary - is it a case of ...
Vito's user avatar
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Negative Binomial SPSS Error

I was running a negative binomial regression in SPSS and received the following message: The maximum number of step-halvings was reached but the log-likelihood value cannot be further improved. Output ...
Vito's user avatar
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Regression for Likert scale SPSS

I have taken a survey. Dependent variable is on Likert scale (1-5). Independent variables are also on Likert scale 1-5. What kind of regression should i better use? I thought about multinomial (or ...
TylerJ's user avatar
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Is this suitable for Negative Binomial Regression?

I am using SPSS to run a negative binomial regression for my research project. My dependent variable is 'Number of Days Went to the Gym' in a week, and my independent variable is income (along with a ...
Vito's user avatar
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1 answer
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SPSS R^2 for Negative Binomial

I am running a negative binomial regression in SPSS and wondered if there is any way to display R^2 statistics, as would be the case if binary/linear regression was conducted?
Vito's user avatar
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Significant index of moderated mediation but no significant interactions of moderators

I ran Hayes process Macro 8 in SPSS. In my results below, you'll see the index of moderated mediation is significant; however neither of the interactions in this model are significant. Model is below. ...
user409598's user avatar
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SPSS computation of the 2-sided bootstrap p-value

In the SPSS Statistics Algorithm Manual Version 29 (p.132 in the pdf) the computation of the two-sided p-value for the bootstrap procedure is described as follows: Sadly, because of different RNGs, I ...
hanna-without-h's user avatar
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117 views

Testing Assumption of Linearity for Multinominal Logistic Regression

I have a nominal DV (0 through 3). IVs are all continuous. I'm trying to test the linearity assumption, however I can't run the logistic regression function in SPSS with the LN IV variables because of ...
Bexx's user avatar
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An contradictory negative edge

Recently I have conducted a experiment exploring the relationship between stress and mind wandering (MW). When I analyzed the data via SPSS, I found an unexpected negative edge between two variables. ...
Gangyuan's user avatar
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When is it appropriate to report the results of a within-subjects contrasts table of a repeated measures ANOVA?

I've just run a repeated measures ANOVA in SPSS, with one 3-level within-subjects variable, and one 3-level between-subjects variable. Is it correct to assume that one should be reporting the main ...
Sarahanne Field's user avatar
1 vote
1 answer
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Identifying an outlier nominal group different than the norm, based on an ordinal dependent variable

As part of my graduate thesis, I've measured the satisfaction levels of a couple hundred respondents across 7 districts of a city about a local public service, using a 4-point ordinal Likert scale (...
ToastedHambugerBun's user avatar
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In a repeated measures ANOVA, is the pairwise comparison result still valid if sphericity is not assumed?

For the pairwise comparison, the p value is less than 0.001. However, the p value for Mauchly's test of sphericity is also <0.001. I believe that SPSS automatically applies the Greenhouse-Geisser ...
Jay Brooke's user avatar
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Principal components analysis missing data SPSS

I have a large data set (27k) There are 63 variables of interest. I attempted PCA as a dimensionality reduction strategy. The items are scored on different metrics ranging from dichotomous variables ...
Danny's user avatar
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False negative B coefficient following multiple linear regression? [duplicate]

I'm running a linear regression in SPSS to test for effects of a binary variable (X) on cost of hospital admission. The variable is correlated with a cost increase of around $3000W When the model has ...
James's user avatar
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1 answer
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Is partial correlation analysis in spss reasonable

I had two continuous variables, neither of which were in line with normal distribution. spearman correlation analysis found moderate positive correlation (r=0.597). Then ...
zhiheng yi's user avatar
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Ordinal independent variable (IV) and continuous dependent variable (DV)

My independent variable is measured on a likert scale (1–5). My moderator is dichonomous (yes or no) I want to use SPSS process macro to measure the moderation relationship. Should I use a dependent ...
breeks's user avatar
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2 votes
1 answer
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Ordinal regression, multinomial regression or linear regression with dummy variables?

I am conducting a study looking at the quality of clinical trials. I am trying to find out what factors are predictors of the methodological quality of the trials. My dependent variable is a score ...
Geedubb's user avatar
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1 answer
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SPSS PROCESS - confusion about what how to test relationships

I am doing my first research and so have no experience in analysis, only theory. I have worked out how to test my moderator relationship using PROCESS model=1, however I am not sure how to test the ...
Alan Nah's user avatar
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How to use repeated measure anova (within participants) if participants fill in likert scale daily for 10 days?

With the sample of people participating everyday in a diary study for 10 days. They fill in the same likert scale every day. How then I can use repeated measure anova after finishing the study?
Saher's user avatar
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Need help with chi-square test interpretation with adjusted residuals

I have conducted multiple chi-square tests to compare 3 customer segments (1 cat variable, 3 groups) on different categorical variables. As the chi-square tests are not 2×2, I have asked SPSS to ...
Tom's user avatar
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How do I calculate effect size in a pretest-posttest three group randomized study for two planned contrasts (ANCOVA)?

I am having a hard time calculating the individual effect sizes for ANCOVA simple contrasts ($1$ vs. $2$ and $1$ vs. $3$) in a randomized pretest-posttest design study with three groups. In the ANCOVA,...
Eniko's user avatar
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1 answer
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Need help deciding about regression or appropriate statistic [closed]

I need to check if presence/absence of repetitions on a verbal test occur due to frequency of external distractions, frequency of self-distractions, or a count of words spoken from original word to ...
user406108's user avatar
2 votes
1 answer
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Age-standardized survey results with complex sampling in SPSS

Apologies if I am missing something obvious with this question, but I have dug around online a fair bit and can't quite seem to find the answer I am looking for. At my organization we have health ...
Drew's user avatar
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1 answer
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PROCESS macro for SPSS - output includes values of the DV which are outside of scale range

I'm running a moderated moderation model (model 3 of PROCESS macro for SPSS) in order to explore a three-way interaction, with one independent variable, one dependent variable, and two moderators. I'm ...
Cassandra's user avatar
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1 answer
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Simple mediation analysis in PROCESS 4.2 in SPSS. The outcome variable is binary, the mediator is continuous and the IV is binary

In the first model, the IV (X) significantly predicts the mediator (M). In the second model, the mediator significantly predicts the outcome variable (Y) but the IV (X) does not predict the outcome ...
lisaarthur's user avatar
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1 answer
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Correlation Metric for Investigating Relationship Between two independent variables

I'm working on a study in computer engineering where I'm analyzing the relationship between the dynamic execution count (frequency) of instructions and the corresponding data error rate (SDC) in a ...
husin alhaj ahmade's user avatar
2 votes
1 answer
62 views

Ordinal Logistic Regression SPSS Interpretation

I have data from a questionnaire study structured like so: Age - Ordinal (18-24, 25-34, 35-44, 45-54, 55+) Gender - Nominal (Male, Female) AnxietyType - Nominal (Self-diagnosed, Professionally ...
amydowse's user avatar
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1 answer
30 views

Path analysis: Mediation and linear regression reporting

Let's say I'm testing this relationship in a path analysis in SPSS AMOS to answer these 2 research questions: Does worker's moral have a significant positive relationship with organisation ...
Simon's user avatar
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1 answer
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Mixed factorial analysis in R

I have data that looks like this: Here the first column is a factor with 2 levels (0 and 1) that represents whether a person played 2d game first or 3d game first (basically order of play). The last ...
Vipin Verma's user avatar
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Multilevel MIXED Linear Regression with pseudo-repeats: Why designate "Repeated' variables, while "Subject ID" already identifies all repeats?

I am bewildered by multilevel mixed-models that have pseudo-repeats. I have difficulty understanding which variables should be considered REPEATED within a mixed-...
Vic's user avatar
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3 votes
2 answers
144 views

Cronbach alpha for non-Likert & Likert survey

I have a thesis ongoing and I have a survey that needs for reliability testing. I was advised to do a Cronbach's alpha test. My survey consists of two parts: Part 1: All questions have varying number ...
Kenzo's user avatar
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1 vote
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Moderated Mediation

Does anyone know the process model # for a moderated mediation, where the independent variable (in this diagram A) moderates the effect of the mediator (B) on C? I attached a diagram below. ...
ElleEh's user avatar
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2 answers
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Best cluster approach for dichotomous variables in SPSS

I'm reading contradictory information on the internet and wanted to get some thoughts on a statistical approach to use. I'll use a fictional example for the sake of easy interpretation. I have a set ...
user404377's user avatar
2 votes
1 answer
69 views

LMM in SPSS for a medical treatment analysis (repeated measurements and nested structure)

For a statistical analysis of a medical treatment I want to use an LMM (linear mixed model) and am quite unsure on how to do that correctly, in particular in SPSS (which is the license I have obtained ...
Sellerie's user avatar
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1 answer
74 views

ANOVA/ANCOVA results in SPSS

I am unsure about how to interpret the output box I get doing an ANOVA in SPSS. That's the "Tests of between-subject effects" box in particular. I had 2 groups (A and B), and 2 results (...
Rene's user avatar
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43 views

Repeated Measures ANOVA SPSS output

I had a question regarding the SPSS output of my RM Anova. I am conducting a RM anova with two time points pre and post which are my within group. My data is distributed in three conditions which is ...
Aron Golding's user avatar
3 votes
1 answer
101 views

Do I have to refit a model before I use the Hayes plugin?

I'm running a mediation analysis where I'm testing if information sharing mediates the relationship between integrity and innovation. The data was sourced using surveys with the survey being on a ...
Simon's user avatar
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1 vote
1 answer
48 views

GLMM on proportion data based on counts

I am running a GLMM on my small dataset ($n=31$) in a repeated measures study that has $2$ groups and $5$ conditions (conditions are fixed for everyone). I am interested in main effects of group and ...
Deevy's user avatar
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1 vote
2 answers
53 views

Am I able to split up a large SEM model into smaller SEM models?

I have a SEM model in SPSS AMOS that is testing the mediating effect of information sharing on the relationship between the three dimensions of trustworthiness (which are ability, integrity and ...
Simon's user avatar
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4 votes
1 answer
101 views

Which Levene statistic do I report?

I am writing a paper comparing quantitative values across $5$ groups. I have performed an ANOVA in SPSS 29 and have requested from the software the Levene statistic to judge if there is homogeneity in ...
user356816's user avatar
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0 answers
50 views

Repeated Measures ANOVA with two covariates

I am doing a repeated measures Anova My variables are like this: Y - continues variable measured pre and post intervention Intervention - the between group variable with three levels in which ...
Aron Golding's user avatar
1 vote
1 answer
36 views

Mediation analysis not producing expected results, probably as consequence of multicollinearity issue

I am using the PROCESS macro to do a basic mediation analysis, with variables X,M, and Y. All are continuous. I know from theory that X and M, and M and Y respectively, should have a relationship. I ...
Maarten 's user avatar
3 votes
1 answer
32 views

Mediation analysis - Hayes Process plugin

I have a model to test 4 hypothesis (all data was collected on a 5-point likert scale through surveys): Ability (IV) has a positive relationship with PO fit (M) PO fit (M) has a negative ...
Simon's user avatar
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Homogeneity of regression slopes and collinearly of covariates in ANCOVA (specific)

Thank you for such a great website for statistics learners, I am currently studying a factorial ANCOVA and have two questions: do we need to test homogeneity of regression slopes for an interaction ...
YuliaM's user avatar
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5 votes
2 answers
88 views

SPSS and PSPP yield very different logistic reggression results with same dataset

I'm trying to run a multiple logistic regression model where the dependent variable is dichotomous and independent variables are either bynary or continuous. At first I only had access to PSPP, but ...
Guilherme Iablonovski's user avatar
2 votes
1 answer
72 views

"This parameter is redundant" - SPSS Binary Logistic mixed model

I know there is a question that asked about a similar warning, but that user's "error" had to do with dummy coding while I think my problem has to be with statistical power and understanding ...
bribina's user avatar
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209 views

Orthogonal polynomial contrasts in SPSS (for a binary logistic regression)

I have 4 IVs: gender (male, female), marital status (married, single), threat (continuous variable) and stress with four levels (ranging from 7 to 10 with ten being 'most stressed'). My DV is ...
lisaarthur's user avatar
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1 answer
50 views

Should I include "Follow-up moment" as a fixed factor in my linear mixed model?

I am performing a linear mixed model to asses whether pain scores differ between surgically treated patients who tested positive for a bacterial culture versus negative. I have 5 follow up moments but ...
Bart Jonker's user avatar

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