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

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Replicating SPSS factor analysis/PCA in R [on hold]

I am trying to replicate SPSS factor analysis/principal component analysis results in r using two previously suggested methods, but neither has succeeded. (What are the differences between Factor ...
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1answer
31 views

How can I correlate groups of variables?

I have conducted a survey to find out the correlation between organizational justice and turnover intention within an organization. So, in the survey, I have asked some Likert-scale questions around ...
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17 views

statistical modelling for imbalanced data

I am dealing with a binary response (good/ bad) type data set of size 2153, which reflects a dependent variable. Out of these, only 67 are in favor of "bad" and the remaining are of "good". Also, i ...
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1answer
125 views

Different shapes of an ROC curve

What are the possible shapes of an ROC curve? Is it necessary for an ROC curve to be shaped like a normal distribution curve? Can we regard the following two curves as ROC with the area under the ...
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14 views

Sensitivity Analysis used in SPSS Neural Network Package

What is the sensitivity analysis used in SPSS Neural Network's independent variable importance calculation? The explanation provided by SPSS is very vague. Is it the same as the semipartial ...
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23 views

Linear Probability Model Construction

I am dealing with a questionnaire consisting of 15 questions. I performed a factor analysis to all the questions and it has given three factors each consisting of 5, 7 and 3 numbers of questions ...
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12 views

Performing t test, one-way ANOVA from mean and SD using SPSS

I have the following summarized data: Group 1: n=44, mean 12.1, SD 2.0 Group 2: n=56, mean 13.2, SD 2.5 Group 3: n=42, mean 12.7, SD 2.3 Is it possible to perform the t test comparing means of group ...
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12 views

How can i combine the three variables into one single measure in SPSS? [closed]

How can i combine the three items into one single measure that indicates whether the respondent has taken part in at least one of the three activities treating it as a single dimension repertoire ? ...
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10 views

Hypothesis for customer dissatisfaction

I am doing research paper that contain the hypothesis of "Building conditions generate customer dissatisfaction among buyers and/or renters". Both building conditions and customer dissatisfaction are ...
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7 views

How do i input binary data correctly for generalised linear models in SPSS [closed]

I am looking at which habitat variables might be explaining the presence of an organism. I'm completely hopeless at maths and therefore statistics is even worse for me. The data set i have is pretty ...
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1answer
19 views

Generalized linear model with random effects for skewed data

I'd like to use SPSS Generalized Linear Model to analyze a dataset of insects collected from one particular species of vegetables. I have following variables: NUMBER (number of insects collected) ...
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15 views

Multiple time points, relation between quantified change in environment and sample population

For a current research, I'm trying to view a relation between a country-level variable index and the financial structure of companies in that country over time. I have annual data for four years, ...
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10 views

Approaches for multivariate nonlinear (but parametric) regression?

I have some data that is nonlinear, but is curvilinear. It is two factors and a dependent variable. Each factor has a pretty good fit when applying a growth curve when compared against (this is ...
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23 views

within group agreement, intra-class correlation, one way ANOVA to justify data aggregation

I am working on my research involving aggregating individual data into group data. Predictor: Task conflict (3-item scale) Process conflict (3-item scale) ...
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16 views

Multiple regression in SPSS

I am trying to figure our which statistical analysis is best for my research. I have 6 cont. IVs and 1 cont. DV as well as several extraneous variables. For my main analysis I want to see if any ...
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2answers
53 views

What is the relation between singular correlation matrix and PCA?

Can anyone kindly give me some information about the statement (last sentence) at the end of below definition. What does it mean by "It can be used when a correlation matrix is singular"? This quote ...
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29 views

Needs suggestions and help for my study

My research question is 'to what extent does patient-provider trust impact African American males' compliance to prostate cancer screening recommendation? This is an exploratory study. I have no ...
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19 views

How to determine which variables need to be trimmed in PCA or Factor analysis?

Background: I'm working with log returns for about 400 tech stocks. I want to use PCA to reduce these into principal components (Internet companies, software developers, circuit board manufacturers, ...
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1answer
17 views

SPSS computing pairwise comparisons after repeated measures ANCOVA, standard deviation question

I am reporting standard deviations for pairwise comparisons of adjusted marginal means. SPSS gives me the standard error that I can convert, but I am unsure if SPSS uses the equivalent of N or N-1 to ...
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11 views

Zero-inflated data? Comparing means in SPSS

I whish to know how to compare means with zero-inflated data. I tried to perform an ANOVA test but obviously comparing means it's impossible since some treatments are very rich in zeros. I'm studying ...
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1answer
23 views

Can I do a dependent t-test if pre & post were anonymous?

I am trying to analyze the following case study using SPSS. What I have done so far as part of my research is to conduct a case study to measure the affect the introduction of different technology ...
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8 views

Negative Reliability for Pre Assessment BUT Okay Reliability for Post Assessment

I have gathered data from only 6 participants participating in a program. Before running my analysis, I wanted to check my reliabilities. The 2 item PRE assessment has a negative alpha. However, when ...
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15 views

SPSS ANOVA Can't Find Independent variable (factor)

I want to know if there is significant differences between groups. I have a string variable "Site" which is grouped into 7 (Values 1-"site A"; 2 - "Site B" and so on). The problem is i can't find ...
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73 views

How to report results from a linear mixed model “test of fixed effects” in SPSS?

What is the appropriate way to report results for linear mixed model based on the "test of fixed effects" table in SPSS? Is it just (F=xxx, p=xxx)? This isn't my data but this is an image I found of ...
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8 views

Cronbach's alpha

I want to use the EAT-26 in my study , and the zero frequency is high in scoring because more than one answer represent zero in scoring ( never=0,rarely=0,sometimes=0) , so Cronbach's alpha is low ?! ...
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7 views

Measuring positive and negative items in Exploratory Factor Analysis

My research topic is related to motivation regarding product usage and the negative items mainly consist of problems that hinder motivation. My dataset is composed of both positive and negative items ...
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27 views

Kruskal Wallis test, with significant difference in variance

I would like to test my subset with ordinal dependent variable (measure in 1,2,4,8,16...) and ordinal independent dependent variables (0,1,2,3), and i choose the Kruskal Wallis test. However when i ...
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2answers
64 views

How to code open ended questions

I have some open-ended questions on a survey which i designed using survey monkey and had exported the responses from survey monkey directly to spss which means that the responses to the short answer ...
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1answer
27 views

Is Chi-square the right test to use when comparing multiple proportions

In my analysis, I have 4 groups: FLU-P (symptoms with virus) FLU-N (symptoms without virus) HCY-P (healthy with virus) HCY-N (healthy without virus) I am looking at the level of antibody ...
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20 views

Non Probability Analysis

I want to quantify the results of my non-probability survey. Are there any analysis techniques I can use that don't require or assume randomness other than descriptive?
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6 views

Set histogram ticks/label using Syntax [migrated]

Let me preface this by saying that I am a programmer by trade, but not very familiar with SPSS. I am helping a friend set up some histogram plots using SPSS Syntax language. Using the Chart Builder, ...
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1answer
29 views

For a conjoint analysis in SPSS, I have 16 cards, but some combinations are unrealistic. Do I still include them in my survey and analysis?

I ran an orthogonal design for my conjoint plan and ended up with 16 cards to test. However, not all combinations make sense in the real world. I'm afraid that if I exclude the cards that are ...
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35 views

Significant Friedman's test vs. non-significant multiple comparisons

I am currently running a randomized, placebo-controlled, cross-over design for a new type of intervention. This intervention is compared to a placebo and another more conventional type of treatment. ...
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29 views

Analysis for a repeated measures design with covariate that varies over conditions?

I'm trying to find the correct analysis that will allow me to carry out the equivalent of a repeated measures MANCOVA with a covariate that varies over three conditions. Basically I have an experiment ...
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2answers
62 views

Mixed Model Type-III Sums of Squares- R vs SPSS

The age old question of comparing sums of squares (SS) between programs has reared its ugly head again. I am trying to replicate output in SPSS, that was computed using Type 3 Sums of Squares, in R. ...
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32 views

Using results of Canonical Discriminant Analysis to get overall variable importance?

I have a dataset with thousands of observations pre-assigned to 18 groups and with measures for 8 different variables. I am using canonical discriminant analysis to see how separable my 18 groups are. ...
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9 views

Interrater relibility in SPSS - how to type in data?

I have 20 participants I rated. I rated them on 10 variables (body language,talk, looks, etc) Now a second rater will rate 10-15 of those participants as well, on the same 10 variables... Is Kappa ...
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1answer
20 views

Logistic regression: Overall significance of categorical predictor in SPSS

In SPSS, when performing binary logistic regression using multiple categorical predictors, a significance level is detailed for the variable overall in addition to each category. This strikes me as ...
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1answer
35 views

SPSS ANOVA or MANOVA or huh?

Me again asking the silly questions - this might belong here as I've been told it may belong in a software section somewhere..? Which I have still been unable to find. Here is a screenshot of my ...
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1answer
67 views

SPSS - making percentage variables

I need to transform a fairly large data set in order to analyse a certain variable as a percentage. I have seconds that I want to convert to their percentage value but by grouping variables. ie. ...
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32 views

How to compare diagnostic accuracy of two tests in unpaired data?

I am wondering whether I can compare diagnostic accuracy, sensitivity, specificity, positive and negative predictive values, and likelihood ratios, between two diagnostic procedures employed in two ...
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16 views

CHAID tree analysis in SPSS

I am trying to build a decision tree using CHAID in SPSS. I am however getting only one node. I have tried taking several data inputs. I also tried out CRT. Is there some setting that needs to be done ...
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20 views

How to identify items answered differently by some factors such as male vs. female?

I want to do something like this: Variable: students (undergraduate, master students, and PhD students) Research instrument: XXXX (20 items) Reporting: The ANOVA analysis suggested that there is no ...
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12 views

When do I use full factorial and when do I use custom when running a repeated measures GLM?

I plan to run a 3-way mixed MANCOVA in SPSS 20. It is a repeated measures study design with... 3 DVs that each subject reported on 10 consecutive days (within subjects variable) and 3 categorical IVs ...
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26 views

Calculate 'order effect'

My experiment has the following setup: Participant completes exercise A. Participant completes exercise B. A counterbalancing design was used to remove (reduce?) the effect of order on the results; ...
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1answer
46 views

Using ANCOVA when the covariate is not normally distributed

I have conducted a repeated-measures ANOVA, but a reviewer suspects that the observed main effect of condition are due to a the difference between hit rates of two conditions (one of them is ...
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55 views

Multiple Hierarchical Regression - Procedure with mediation

I have a set of hypothesis that I am looking to test. The model is as follows: http://i.imgur.com/pdGRiyw.jpg (simplified to X -> M -> Y) ie. I am looking for direct effects from X -> Y, X -> M, M ...
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22 views

How to measure order effects in SPSS?

I need to measure the order effects for my data. I have four questionnaires that were counterbalanced, which lead to 4 different orders. However, for one questionnaire, there are two subscales, ...
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13 views

How to include replicates in linear mixed models in SPSS?

In my study I had 11 radiocollared hares which i gave 3 different treatments. one treatment was the release of stressed hare sounds in combi with red fox sounds, the second treatment was sheepsound ...
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11 views

Which type of test is better to compare difference of one independent variable (3 groups and one control) on a repeated measures experiment?

I have a group of 100 classroom participants, all who have taken a course that included four different lessons (from a single unit). Three lessons were taught each using a different form of ...