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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44 views

How to report non-normal distribution and Wilcoxon in APA style

I have within-subject design and want to compare the means of two conditions. I first run the test for normal distribution and used Shapiro and p values are ...
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1answer
16k views

Doing principal component analysis or factor analysis on binary data (using SPSS)

I have a dataset with a large number of Yes/No responses. Can I use principal components (PCA) or any other data reduction analyses (such as factor analysis) for this type of data? Please advise how I ...
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1answer
9 views

Can we run an ordinal and multinomial logistic regression for combined independent variables' levels?

I have one outcome/dependent variable that can be ordinal or nominal and 3 independent variables. I have learned so far how to perform ordinal and multinomial logistic regression in SPSS between a ...
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1answer
21 views

Decision Tree Giving Impossible Splits

I ran a decision tree in SPSS, using the CHAID method. The result was a tree with many nodes. Some of the splits were impossible. For example: for a variable that is from 0 to 10 (in %), a split was ...
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0answers
26 views

How to Graph Moderation Effects on SPSS

I am conducting an independent research but am completely stuck on how to visualize my data. So I am looking for a moderation effect of peer sociometrics (ex. negative nominations, social ...
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4answers
3k views

How to handle with missing values in order to prepare data for feature selection with LASSO?

My situation: small sample size: 116 binary outcome variable long list of explanatory variables: 44 explanatory variables did not come from the top of my head; their choice was based on the ...
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1answer
590 views

Optimal scaling / CATREG (categorical regression) for imputed data

I have a data set with 5 different kinds of nutrient statuses and I want to see whether they are associated with categorical / ordinal grades at school. I have multiple covariates which I will ...
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2answers
208 views

Predicting variance of heteroscedastic data

I am trying to do a regression on heteroscedastic data where I'm trying to predict the error variances as well as the mean values in terms of a linear model. Something like this: $$\begin{align}\\ ...
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0answers
12 views

SPSS | Repeated-Measures ANCOVA | Covariate

We are performing a RCT with 4 groups (1 control + 3 experimental), where we measured physical activity (PA) at baseline, post-test and follow-up. Although we have done stratified randomization, the ...
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3answers
2k views

Mediation analysis when mediator is categorical (SPSS)

I want to do a mediation analysis, with the following variables: ...
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0answers
16 views

Generalized estimating equations - Multiple binary responses per condition (spss)

I have a repeated measures design. Each participant has two visits, one on placebo, one on drug. The task has a number of conditions. 'Target' has 2 levels, MS and RNG. Within the Target condition ...
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1answer
15 views

How can I export PCA output data in SPSS? [closed]

I have performed a PCA to reduce the number of variables in my dataset. Now I want to have new dataset with reduced dimension to perform further regression analysis with other variables. How can I do ...
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1answer
220 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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0answers
9 views

SPSS data management [closed]

grateful for any help! Here's the background: I'm using SPSS In my data, each row is an individual's appointment Each row has an identifier for the individual (SSN) Some rows have demographic data ...
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0answers
18 views

How to analyze technology acceptance model hypothesis with regression analysis in SPSS

I want to ask how to do regression analysis using SPSS with my survey data. My survey data consist of 15 question items which belong to 4 groups: Perceive of usefulness, Perceive of ease of use, ...
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1answer
2k views

How can I compare regression coefficients in the same multiple regression model

I think this question has been answered in bits and pieces here and there, but I am still a bit unsure about what the best approach for this is: how to compare two coefficients from a multiple linear ...
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0answers
23 views

Data Aggregation Using ICC(1) & ICC(2) & Rwg

I am currently working on a thesis in order to graduate, and I need help to understand how to justify aggregation. My issue is that I don't quite understand what is require to do to test ICC(1), ...
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1answer
31 views

the graph of log(-log) for Cox model on survival analysis

I'm studying Cox Regression model on Survival Analysis. While testing validity of Proportional Hazard model, I will use log(-log) graph method in SPSS. First of all, I mention which procedure I'm ...
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0answers
7 views

select the variables in the eqation binary logistic in spss [closed]

I have run binary logistic spss in order to check the significance in 9 categorical predictors in my master theses. When comes to output in the box of variables in the equation i dont know to what to ...
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1answer
36 views

What to do with negative ICC values? Adjust the test or interpret it differently?

For my graduation thesis I am doing a study for the test-retest reliability of the tendon thickness of a particular muscle. So this study contains one rater and 70 subjects who have been tested at two ...
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58 views

Standard error explanation [closed]

In which direction and how far away, in terms of standard errors, is the estimated  difference ( Diff x ) in Case 1 from the hypothesised value. So what I've done is calculated t0= estimate - ...
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0answers
18 views

SPSS - how to perform several univariate binary logistic regression analysis [closed]

I have a simple question about SPSS. I have a dataset in which I want to identify variables (among 154) which are associated with my dependent variable (two outcomes possible). To present the results, ...
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0answers
15 views

Auto-correlation Assumption

I am testing the auto-correlation assumption of OLS. My study is conducted on the most active companies on the Egyptian stock exchange over a period of 5 years. Not all companies included in the ...
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1answer
19 views

Multinominal vs Ordinal regression

What is the difference between ordinal and nominal regression? If i want to run driver analysis after regression and have 3 variables, the DV is 5 point scale question with options "Very good, good, ...
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0answers
20 views

Specific Differences B/T SPSS Grad Packs

I have been using the Trial Version of IBM's SPSS Statistics Desktop v. 24 I would like to purchase the most affordable option that enables a few but very specific features my research requires. ...
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1answer
424 views

3 way mixed ANOVA & pairwise comparisons effect size

I have a 3 way mixed ANOVA, where I have 2 significant main effects, one significant two way interaction and a significant three way interaction. I've been told to not describe the lower order ...
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1answer
577 views

Regression with multiple dependent variables and 2 sets of multiple independent variables

In my data I want to be able to determine which set of IVs (there are 8 variables total, 4 in each set) does a better job of predicting a set a DVs (there are 4). I know I could use multivariate ...
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0answers
5 views

SPSS Syntax - Identify duplicate responses and systematically identify cases to keep [migrated]

I have a large set of survey data in SPSS where around 15% of respondents answered the survey more than once (this was not intended). I have formulated a systematic method to determine which cases to ...
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1answer
50 views

Linear regression with unbalanced dummy variables + not normally distributed residuals

I am conducting a multiple linear regression analysis in SPSS. My DV is a score between 0 and 6, and my predictors are: one dichotomous nominal variable (native vs. non-native speakers) one ...
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2answers
1k views

Correlation among categories between categorical nominal variables

I have a data set with two categorical nominal variables (both with 5 categories). I would like to know if (and how) I am able to identify potential correlations between the categories from these two ...
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0answers
27 views

Identical mixed models in SPSS and R nlme, with different degrees of freedom. Which to trust and why?

I am analyzing a multilevel dataset with an AR(1) error structure and random intercept and slope. I fit what I believe is the exact same model in SPSS and R- my coefficients and standard errors are ...
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0answers
75 views

R vs SPSS - simple effects analysis in mixed 2x2 ANOVA scheme - same data, different results

I prepared a mixed 2x2 ANOVA design analysis both in SPSS and in R. The SPSS script is correct, but in R script there is a mistake somewhere. To test that I generated artificial data from a normal ...
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1answer
137 views

Comparison of longitudinal data in a same group of participants but using two entirely different tests

I have a dataset of participants who were longitudinally followed up at two different time points. They went through a series of measurements at both points. Even though the overall domain of the ...
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0answers
21 views

Setting Linear mixed model for within-subject crossed factors

I have problems in undertanding how to correctly run a mixed linear model. I have done an experiment to compare three groups (1 between-subject factor); for each subject, 2 sensory stimuli are given ...
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1answer
18 views

what's the difference between weighting and transforming?

In regression analysis, what's the difference between weighting and transforming when it comes to spreading residuals? For example, we need to weight the model $y=ax+b$ by $1/x$, isn't it just ...
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1answer
227 views

Calculating Cronbach's alpha: Same scale, multiple instances

I'm working on data analysis for my dissertation, and I'm banging my head against the wall when it comes to Cronbach's alpha. I just completed a pretest; after data cleaning, I have 119 valid and ...
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3answers
6k views

Cronbach's alpha continuous and dichotomous data in SPSS

I have one question about using SPSS to calculate Cronbach's alpha of a measure that draws on two types of items: one yields ordinal data and the other dichotomous. The ordinal data are produced ...
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0answers
34 views

Significant model but not the predictors? (Logistic regression) [duplicate]

I'm doing a binary regression, with two predictors one binary and one continuous. I'm using the enter method. I want to know if my model can be significant when I compare it to the model with only ...
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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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0answers
17 views

I have two independent variables ( 1 categorical, 1 continious) and one dependent varrible

I want to measure how cultural stress impacts male and female graduate students` level of marital satisfaction. But I am not sure what is the best analysis test in SPSS. Both cultural stress and ...
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2answers
6k views

Fisher's Exact Test value in SPSS

I have two ordinal variables, and I'm using the Fisher's Exact Test in lieu of the chi-square test when the expected values for the latter test are lower than 5. My contingency tables are $3\times2$. ...
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4answers
24k views

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

I have gathered data from 130 questionnaires and I have 30 variables. Cronbach's alpha is badly negative. I have checked everything I could think of, but the result did not change. SPSS file is ...
36
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8answers
13k views

Is PCA followed by a rotation (such as varimax) still PCA?

I have tried to reproduce some research (using PCA) from SPSS in R. In my experience, principal() function from package psych ...
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0answers
22 views

Categorical variable intercept in generalized linear model

I am running Generalized Linear Model and I have one continuous dependent variable, two categorical fixed factors and 22 continuous independent variables as covariates. When I run the model, I get ...
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1answer
131 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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0answers
67 views

How to model a 2x2x2 dataset for a 3 way repeated measures ANOVA analysis

I have some data derived from a 2x2x2 experimental design. There are 3 IV's, each with 2 levels. My DV is reaction time (measured in seconds). I've used a repeated measures design (n=10). I have 20 ...
0
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1answer
284 views

Analyzing constructs with multiple items in SPSS (Regression & Correlation)

I am doing a master's thesis on the roles played by Perceived Bank Image, Perceived Service Quality and Perceived Satisfaction in predicting Customer Loyalty. My questionnaire consists of several ...
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1answer
189 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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0answers
17 views

Transformation and/or Winsorizing?

I want to compare two group of 24 and 28 people with t-test on type of activity (5 different's types of activity and a total), later one the same value will be use in regression logistic. If you ...