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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What I supposed to do if Cronbach's alpha is negative?

I have 100 sample with 8 questions with answers between Yes or No (Guttman scale). Cronbach's alpha is badly negative. I have checked everything I could think of, but the result did not change. I have ...
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Model simplification in SPSS [closed]

can someone please guide me with performing model simplification with steps in SPSS? I am assessing the attitude of people towards animal welfare and have collected data on attitudes using a Likert ...
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Sex, Dose, and Repeated Measures Analysis

I am testing the hypothesis that male and female have a different timeline of withdrawal behavior, such that either males or females experience greater withdrawal symptoms from morphine across 12-24-...
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Chi square interpretation [closed]

Hello what does u value mean in this table, what does it indicate? This is Mann Whitney test
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Interpretation of kruskal wallis test results

Hello I have run a kruskal wallis test to compare the median between three groups as in this picture below: I know what median value and p value are but: IQR is the spread of data but what is used ...
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How to compare the difference of two time points of two groups

Let's say I want to compare the height change of female students and male students between two time points. I want to know if there is any difference between males and females in terms of the height ...
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How do I perform a content analysis in SPSS? [closed]

I am struggling to find the right statistical test for a content analysis. I have categorized and coded the different variables (e.g. text length) and generated the Excel file for the analysis. The ...
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What graph should I use in SPSS [closed]

I have been measuring CH4 concentration in different depths for 3 lakes and I now want to present it in a graph, lake for lake. The reason why I want to present it in a graph is to be able to ...
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find a suitable statistical method to analyze Yes/ No type qualitative data

I have done a survey on finding the applicability of Co- management system on a reservoir. This survey contains 8 main points. Under one main point, I included some Yes/No questions (No of questions ...
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2 answers
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What's WRONG with my multiple regression model

I am working on a regression model, more precisely, multiple regression model for predicting one single value. I have a dataset of cars and some technical data. For example, I have the following ...
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SPSS - How can I measure whether a questionnaire consistently decomposes along similar dimensions? [closed]

I've been using a 14-item questionnaire that measures thought content. Each row in my dataset represents a completed questionnaire, showing the scores on each item. I've been decomposing sets of ...
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Regression predicting car acceleration in SPSS [closed]

I have a file containing ca. 900+ car models manufactured in 2021. In addition, I have technical data on 27 cars however, they miss: acceleration, top speed, fuel consumption, and CO2-emissions. I ...
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All Sig. Results <.001 Bonferroni

i have a data set of 73 participants and am running a ANOVA Repeated Measures test in SPSS. When viewing the Pairwise Comparisons table for the Bonferroni correction, all my Sig. results are <.001. ...
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2 answers
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Calculating Cohen's Kappa in SPSS for a systematic review

I'm sure there's a simple answer to this but I haven't been able to find it yet. All the explanations I've found to calculate Cohen's Kappa in SPSS use data that is formatted with cases that are ...
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Identifying confounders in multiple linear regression

I am currently trying to identify confounders in a multiple linear regression, but I am a little unsure of a couple of steps. These are the steps I am taking: Check to see if the potential ...
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What statistical analysis should I use [duplicate]

I have been measuring flux of CO2 in (mmol m-2 d-1) from two different rivers and I now want to do a statistical analysis using IBM SPSS but Im not sure where to start. One lake is showing negative ...
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Statistical analysis of carbon dioxide flux data

I have been measuring flux of CO2 in (mmol m-2 d-1) from two different rivers and I now want to do a statistical analysis using IBM SPSS but I'm not sure where to start. One lake is showing negative ...
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How should I calculate effect sizes for a 2X4 table?

I have used the software SPSS to produce a 2X4 contingency table, using categorical data. I am aware that odds ratio is only applicable for 2X2 tables. Are there alternatives to odds ratio to try and ...
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EFA: Eigenvalues or Loadings after extraction (SPSS)

I've been doing a EFA with ML extraction and Promax rotation, whereby three factors were extracted. For reporting the results, I was wondering whether to use the 'Initial Eigenvalues' or the '...
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How do I analyze my data with regression analysis?

I am a college student currently doing a research paper so I don't have much experience with analyzing a data table. Our group decided to conduct a survey and I have collected a data table from an ...
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What is the difference between constrained and unconstrained models

I have a question what is the difference between constrained and unconstrained model or freely estimated model. I am trying to test for chi square difference between them to determine discriminant ...
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Interpretation of GLM models with covariance

Interpretation of both GLM-models. How is cognitive function associated to PTSD symptom severity outcome over time between the two groups? Groups exists of treatment and control group. Because of a ...
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Mixed model from SPSS doesn't produce same results in R? Am I miscoding something?

TL/DR: I'm trying to convert a model from SPSS to R and I'm getting different results (Estimates of Fixed Effects), and I haven't been able to figure out what I'm doing wrong. Syntax, code, and ...
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Can i use a kendalls tau in place of a pearsons correlation and then do a multiple regression?

My data does not meet the assumptions for a pearsons test, so instead i plan to use a kendall's tau correlation. my question is can i cotinue on with a multiple regression? if not what statistical ...
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What is the suitable experimental design and how to implemante it in R or SPSS?

I have a question about the type of experimental design to describe my data and details of how to implement it using R or SPSS. I have three types of roses, three types of soil, two types of graft (...
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3 answers
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What statistic test to use?

I am new to statistics! I have 2 groups of city population based on education level (group A: educated, group B: without education) I try to figure out if there is a difference between the number of ...
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Doing repeated measure with blocking design

for this study which analysis do you suggest? repeated measure or blocking design? I have 6 subject, to compare effect of a drug administered in four dose levels. Dose 0 we used control. two days wash ...
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1 answer
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How to quantify the effect of a mediator, SPSS, Psychology experiment

I have collected data to answer the question “Does Neuroticism Mediate the effect of a Mindfulness Intervention?” I Have collected pre-intervention Mindfulness Score and a post intervention measure (...
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1 answer
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Which statistical test should I use to see if the month of onset of a disease is random or clusters in the winter?

I have data showing which month a disease started for 119 subjects. The months are represented by 1-12 (Jan - December). We hypothesize the disease more often onsets during winter months. What test ...
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Calculating significance in single group

I am currently writing my bachelor thesis. I conducted a survey to get an insight on the effectiveness and awareness of self control tools. The survey is already done and I am currently in the process ...
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spearman correlation: should only the ranked values be plotted on a scatterplot?

My data is not normally distributed and so I did a spearman correlation rank test. I now need to make a scatterplot showing the spearman rank test results and I am not sure if the scatterplot should ...
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Have my assumptions been met?

I am running assumptions for multiple regression and scatterplots are a real bane of mine. Can anyone advise as to whether the following scatterplot provides a linear or non linear relationship ...
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1 answer
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Unequal sample sizes in 2x2 between-subjects ANOVA

I have a 2x2 between-subjects design consisting of Gender (Male, Female), and Relationship status (Married, Single). The DV is completion of a certain behaviour (Yes, No). I plan to use SPSS. I plan ...
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2 votes
1 answer
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How to deal with Structurally Missing Data?

I am currently analysing a dataset from a survey that moved participants to a different section depending on their response to a previous question, (e.g. people who said they were not farmers, skipped ...
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1 answer
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The percentile method

a research used the percentile method to find the prevalence in severe group as below: The outcome variable was categorized using percentiles to Mild, Moderate, and Severe in the Symptom Severity ...
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Which Statistical Test is Appropriate if data is not normally distributed?

I have conducted a study where each participant is given 4 minimal vignettes which they are asked to rate using a Likert Scale. Participants are then split into two separate groups: one seeing the ...
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Relationship between sex and disease by using SPSS

I use SPSS. I have a data set for 495 patients (220 patients have a problem in two eyes, and 275 patients have a problem in one eye). I have sex, age (numbers), age groups as a categorical variable(...
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1 answer
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Grouping using percentiles

I did visual binning process in spss and made three cutpoints like in this image: I did check off included I want to know the percentage range or value for each group. If I describe it in this way is ...
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Is there anything like a two-way ANOVA but for continuous independent variables and a nominal dependent? Also, alternatives to logistic regression?

I want to determine the interaction between two of my continuous (scale) independent variables on the one dependent variable, which is dichotomous (cases are coded as 0 and 1). I was going to use a ...
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Is percentile a good method?

Hello I'm an undergraduate student doing research about prevalence of carpal tunnel syndrome among college students I want to follow the method of this research (prevalence of carpal tunnel syndrome ...
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2 votes
1 answer
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Stata and SPSS regression results different

I am using Stata with a simple dataset to do very basic regressions and comparing with SPSS to see if the results are the same, but they're not. I'm close, the significance are slightly the same, ...
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2 votes
0 answers
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How do I make a mixed model in SPSS when treatment is intertwined with subgroups?

I'm experiencing difficulties with running a mixed model in SPSS (version 26). My experiment is a 2x2 factorial design in which we provide light and/or larvae to chickens. I have individual (...
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Appropriate statistical test to compare groups containing discrete data

I need to compare more than 2 groups, each containing discrete data (more specifically, integer numbers between 1 and 9). Shapiro-Wilk tests come back as significant for most groups, meaning the data ...
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1 vote
1 answer
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Linear regression assumptions violated

I have an independent variable hours/day sitting and a dependent variable test scores, I think all of the assumptions of linear regression are violated, as in the pictures that I added So I did one ...
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How to run and interpret Multilevel Models in SPSS?

I'm totally new to using SPSS and am trying to understand how to run and interpret multilevel models (which I'm also fairly new to)... I have data for 4 groups of around 200 participants each, and all ...
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1 vote
1 answer
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Best method for this study design

I have 7 independent variables age (continuous variable), body mass index (continuous variable), gender (catagorial variable), department (catagorial variable), hours/day on computer (catagorial ...
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2 votes
2 answers
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the two step approach

I have a continuous variable which is not normally distributed i want to transform it to normal using the two step approach method in the link below: Abstract This article describes and demonstrates ...
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2 stages mediation ordinal independent variables and yes/no dependant variable

i want to test if low work efficiency during lockdown has an impact on sleeping pills consumption, my dependent variable is the consumption of sleeping pills ( yes/no question) , the independent ...
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Several one way anovas vs factorial anova

Is running several separate one-way anovas instead of factorial anova or two way anova have a big influence on p-value? If i run separate anovas will I get completely wrong results? I have 7 ...
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2x2 Repeated measures ANOVA gives DIFFERENT result in R and SPSS? (Same type of sums/data/analysis) Anyone know why?

Reposting this because I fixed the formatting to see if someone can actually provide a solution for this problem. I have a study design in which I am carrying out a 2x2 repeated measures ANOVA in ...
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