SPSS (Statistical Package for the Social Sciences) is a proprietary cross-platform general-purpose statistical software package.

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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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1answer
15 views

IBM SPSS QUESTION: Measure the perception of the respondents

My problem to solve with IBM SPSS is: I have got answers to a question about X topic that contains 15 options of multiple response and I want to characterize the perception of the correspondents ...
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2answers
38 views

How can I model a binary outcomes in time series using logistic regression?

My data has a binary outcome (attack or not attack), day (20 day in repeated measured design) and some covariates (nestling’s movement). The objectives of my experiment are testing the effect of time ...
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16 views

How to add supplementary variables after PCA using principal function (psych package) in R? [on hold]

Is there a way to add supplementary variables to a PCA plot when the PCA was conducted using the principal function from the psych package in R? I know that the PCA from the FactoMiner package has ...
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1answer
23 views

AIC or BIC for model selection in Cox regression (SPSS)

Does anyone know if there is a method (a macro) to calculate AIC or BIC for a model in Cox regression using SPSS?
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7 views

How can I calculate the number of cases in SPSS? [migrated]

I would like to calculate the last column with SPSS without turning the columns into 1.
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33 views

Compare more than two means

New in statistics and I need your help regarding an easy question I think. I'm running out of time for my assignment so I kindly ask you to help me if possible. I'm running a pretest and the main ...
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26 views

How to handle autocorrelated residuals (and independent variables) in multiple regression? [closed]

I am trying to carry out multiple regression for an air pollutant (dependent variable), and weather parameters- wind direction, wind strength, rain, air temperature, relative humidity (independent ...
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20 views

How to analyze data with DV only measured at the group level and moderator measured at the individual level?

This may be a relatively simpleton kind of question to ask, as this forum seems to be rather statistically sophisticated, but I'm rather mixed up right now. I ran a study that involved individuals ...
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11 views

Chi square test and comparisons within this

I'm running chi square on a set of data that consists of frequency, question type, and participant group. I have an overall significant statistic but want to get p values for each question type across ...
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0answers
20 views

ANOVA analysis?

I need some help since I'm not that good with statistics. I have to perform a study to know whether different groups of people are willing to buy a product. I've shown 6 different scenarios, thus I ...
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0answers
26 views

Enterprise Use of SAS & SPSS and Impact of Open Source Platforms (R & Python) [duplicate]

I'm curious to hear from people that use SAS & SPSS why a lot of the Fortune 100/500 enterprises still use SAS & SPSS despite the high cost of the license. Also would love to understand what ...
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12 views

How can I count unique values corresponding to a break variable with the function aggregate in SPSS? [migrated]

I guess it is really easy, but I just cannot find the answer myself. The variable that I would like to calculate is the variable "Number_of brands_bought" (see below) and I've tried to use the ...
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22 views

What algorithm should be used for intelligent route planning system based on drivers experience

I am new here and I'm a student, my project is on machine learning for an intelligent route planning algorithm. Basically the summary of my project is to use a machine learning algorithm and ...
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0answers
35 views

Interpretation of output generated by PROCESS macro in SPSS for model with two moderators

I used the PROCESS macro for SPSS from hayes to regress a model where det_mean is the indepedent variable and y_tot the depending variable. I'm testing if this relation is moderated by two variables ...
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1answer
49 views

Please help with an appropriate type of regression to obtain numerical result (SPSS) with categorical data

Please help me to figure out the right approach for fairly straightforward task. Let say, we asked respondents to state 3 most important attributes (over ten) for the one product. Answers were coded ...
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15 views

Pretest-post test and General Linear Models

I have two continuous variables; a pretest and a post test results. They seem to have significance in paired samples; p=.000. However I wonder what caused the post test to be better than the pre test ...
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1answer
40 views

how to compare two percentages to prove for statistical significance

I have problem to compare the two percentages and to get the statistical significance for these two different percentage. I just want to approve whether these two percentages are significant or not ...
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0answers
20 views

Which statistics to use and how to organize data

I have a categorical dependent variable, namely the answer that participants gave to a series of items. The answer can be "yes", "no" or "maybe" (x 54 items per participant). There are two independent ...
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1answer
97 views

How to follow up a factorial MANOVA with discriminant analysis?

This is a follow-up to to my previous question: How can MANOVA report a significant difference when none of the univariate ANOVAs reaches significance? I have two IVs with each having three levels ...
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19 views

Conjoint Analysis Simulation SPSS - excluded subjects

With SPSS when I run a simulation with conjoint analysis I got this message: "142 out of 155 subjects are used in the Bradley-Terry-Luce and Logit methods because these subjects have all nonnegative ...
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0answers
28 views

Fisher exact test (9x2) vs pearson chi-square (SPSS)

I am doing one analysis where I have 9 different conditions and only two options as outcome. I have done a pearson chi-square test, and in some of the cases I violated the assumption that expected ...
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12 views

Fixed parameter estimates of parent factors in a nested design

Summary: What is happening with parameter estimates of factors that are the 'parents' of nested factors? Data: My analysis involves testing the effect of different parameter settings for automatic ...
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26 views

Pair-wise comparisons for chi square test SPSS?

How do you see pair-wise comparisons for chi square test SPSS? I have 4 groups and one variable and want to see all the significant pair-wise comparisons.
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1answer
41 views

“The EM algorithm failed to converge in 25 iterations”

When I Replace Missing Values - Expectation-Maximization in SPSS, I receive the following message: The EM algorithm failed to converge in 25 iterations. Should the algorithm be able to converge? Can ...
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1answer
26 views

How do you set your own intercept in SPSS? [duplicate]

I am trying to specify the constant in a regression model using SPSS. Does anyone have an idea on how to do this?
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1answer
30 views

Understand mixed models SPSS [duplicate]

On a mixed model on SPSS I got the following results: in the table called "Type III Tests of Fixed Effectsa" ...
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1answer
14 views

Dependent samples but unable to pair individual scores

We surveyed a group of students before an in-school year-long project and after, and want to see if the changes in scores are significant. Data doesn't meet assumptions of normality. Can we use the ...
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10 views

How to analyse categories ranked 1 to 5 between two groups

I currently have 5 categories. I asked two groups to rank activities from 1 to 5: 1 is the most preferred activity and 5 the least preferred activity. How could I analyse this to see if there is a ...
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60 views

How to obtain an exact value of the determinant of a correlatiom matrix when doing PCA in SPSS?

When I perform a Principal Components Analysis (PCA) in SPSS 22 I get a footnote under the correlation matrix which states that the value of the determinant $=.000$. I am not able to display more ...
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18 views

Is there any possible method to calculate effect size in SPSS mixed model?

I run MIXED command for mixed model analysis of repeated measured data. However, there is no option or menu for estimate power(like partial eta in GLM) in mixed analysis. Is there any method to ...
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35 views

Multiple imputation in SPSS: merge datasets?

I have two sets of data, measured from the same persons. The variables in the two sets are very different. There are some extreme values (occurring at random) in both sets I would like to handle using ...
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1answer
43 views

Creating composite vairables in Structural Equation Modeling

I was wondering if you can help me. I want to run a pathway model using composite variables. Each composite variable is made up of 3 or 4 observed items. To create the composite variable to draw my ...
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1answer
25 views

Multi-level, creating second level variable

I have some trouble coding my data for multi-level analysis. I'm doing research on test results of children. These children are grouped within classes, within schools. I'm using class as the highest ...
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1answer
19 views

How to perform a conditional cross-tab in R or Excel? [closed]

I recently was given a project which consists of: pulling together words from ~500 small tweets and doing a matrix, which shows which words occur together in which tweets. I am wondering how I can ...
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1answer
31 views

Regression: Covariance table in spss vs. mplus

I want to use regression output (b, se B and cov of several predictors) as input for a new analysis. One example: I want to compute: SE^2(b1) + SE^2(b2) + 2 COV (b1,b2). If I do a basic regression ...
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1answer
273 views

What is component (factor) score coefficient matrix in PCA or factor analysis and how is it calculated?

As per my understanding, in PCA based on correlations we get factor (= principal component in this instance) loadings which are nothing but the correlations between variables and factors. Now when I ...
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1answer
75 views

Box-Cox transformation in SPSS

I have a dataset of variables that fail to conform to a normal distribution (Kolmogorov-Smirnov sig. value = 0 for all the variables). In order to perform parametric statistics on these variables I ...
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1answer
37 views

Is 0.40 Alpha score (KR-20) acceptable for a true-false test?

I have 10 true-false-Idont know test items. I codded correct responses as 1, incorrect ones and dont knows as 0. I got 0.40 alpha score (or KR-20). Do you think that this score is acceptable for such ...
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29 views

SPSS: descriptives in repeated measures

This is a question that has been bothering me for a long time, and until now I haven't been able to come up with a decent solution. Imagine you do a straightforward repeated measures analysis in SPSS ...
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1answer
23 views

Wrong error term for test of random factor in two-way mixed-effects ANOVA in SPSS

In SPSS, when I run a two-way mixed-effects ANOVA (with factor A fixed and factor B random), the between subjects effects table reported by SPSS uses mean square for the interaction (MS_AB) as the ...
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16 views

Need help in determining what tests to run in SPSS

I'm trying to find out whether there are any relationships between variables in my data set from Pew. I have two independent variables and one dependent. My first independent variable comes from a ...
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15 views

How to correlate scale and nominal variables in SPSS? [duplicate]

I want to run a test in order to identify if there is any correlation between the length of in-hospital stay (Scale) and the kind of the procedure (Nominal with three options; abdominal, cardiac and ...
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51 views

Choice based conjoint with SPSS

Is it possible to run a Choice Based Conjoint analysis (preferably with also no-choice option) with SPSS? Do I need a particular package for that? if not possible with SPSS is it possible with Stata? ...
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1answer
224 views

How to analyze my Likert-scale data

I am collecting data from a group of about 189 police officers on a 5-point Likert-Scale (measuring how much the police officers accept rape myths). I have no idea which tests to use to analyse my ...
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122 views

Q: Exploratory factor analysis in R

I am trying to do an exploratory factor analysis (EFA) in R with oblique (promax) rotation. From Wikipedia, In oblique rotation, one gets both a pattern matrix and a structure matrix. The ...
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1answer
47 views

Post-hoc after GLM: What does it exactly say?

Background: I have been asked to model the change of weight of a few animals undergoing experimentation via a simple GLM (General Linear Model). The data looks something like this. Note that all data ...
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46 views

Perhaps easy about SPSS Chi Square and Bonferroni

Oh hello. I just have entered here. Best place for my question. Sorry for that question in other site's part. :) So perhaps it's easy question, but I encounter this problem first time. I go ...
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29 views

Multiple, multiple regressions?

I have done a study on whether personality and demographics predict interaction on Facebook brand pages. I have used a Big five personality scale and the demographics include, sex, age, marital ...
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40 views

Post-hoc with Bonferroni a correction after ANOVA with repeated measure in SPSS

does somebody know where I can find the t value of post-hoc tests with Bonferroni correction when using SPSS.From what I get so far, I only see p values. Should I add a command in the script? Thank ...