SPSS (Statistical Package for the Social Sciences) is a proprietary cross-platform general-purpose statistical software package.
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84 views
How do I perform a cox regression analysis while adjusting for a variable?
I would like to perform a multi-variate cox regression model looking at various factors influencing the risk of recurrence of disease such as BMI, age, year of surgery, etc. Some of these patients ...
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2answers
266 views
Which statistical test to use for Likert scale questionaire
I need help on determining what tests to use in SPSS. Let me provide some background on my research:
I am doing a research on system automation of leave management in a company (which is still using ...
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0answers
100 views
Repeated measures ANOVA: Mauchly's test undefined
I'm doing a two-way between-within ANOVA in SPSS. I have two groups with 9 subjects each (so total = 18), and 24 levels of one repeated measure.
I understand why Mauchly's test of Sphericity has no ...
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0answers
82 views
comparing change scores over time in two groups without a treatment
I am trying to compare the scores of a simple cognitive test at 3 time points in two groups (one group is n=30; other is n=20). there is no treatment as I am just looking to see if one group has a ...
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0answers
197 views
I'm not sure how to interpret my binary logistic regression output from SPSS
My dependant variable is diagnosis of cancer malignant being 0 and benign being 1. And my covariate is mean radius (of the tumour). I get this:
...
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3answers
99 views
Best method to analyse whole population data
I have data of an entire population (N=27). I would like to find out which variables (of many) have the greatest effect on one certain dependent variable, and how much of its variance can they ...
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1answer
80 views
Is ETA a good measure for computing the efect size between an ordinal and a nominal variable?
I have a nominal and an ordinal variable and I would like to look measure the association that is between the two. For now, I have done Chi-square test and non-parametric Kruskall-Wallis Test and I ...
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1answer
24 views
what are the dependent and independent factors and categorical for below project [closed]
my project is identification of factors influencing motor bikes for home to office trip. there are some attiributes like gender,age,marital status,education qualification,job type,working sector, no. ...
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1answer
179 views
Need help with normalizing data in SPSS
I apologize in advance... there's a good amount of stuff to read before you get to my question. Maybe I could have saved a word or two here and there... but overall, the background (I think) was ...
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2answers
146 views
are there any statistically significant differences between my study population and a sub-group within it?
I have a total population of 31, of these I have a treatment finishing population of 20.
I want to run a test on SPSS to identify if there are any significant differences between the 20 individuals ...
3
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1answer
200 views
Box's test for equal covariances or Mauchly's test of sphericity?
I am writing a report on a 2 x 3 mixed study. There is ONE within IV with TWO levels and there is ONE between subjects IV THREE levels. There are two DVs.
Sample sizes for each group is 25, 25, 27.
...
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0answers
42 views
Appropriate tests for finding a diffference between the scores of two groups of questions
I am testing whether there is difference between the scores of 2 groups of 12 questions on a Likert-scale questionnaire. Each question from one group has a corresponding question in the other group ...
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0answers
63 views
Test of normality repeated measure ANOVA
I'm trying to do a repeated measure ANOVA analysis on the 5 NEO-FFI factors (Neuroticism, Extraversion, Openness to experience, Agreeableness and Conscientiousness). Sujest are tested only once, so I ...
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0answers
36 views
Linear mixed model estimated means
I am trying to determine how to get SPSS (19.0) to give out estimated means for my interaction. To preface, my analysis has 3 groups (group a, b and c) and each group was measured at 5 time points. We ...
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0answers
110 views
Random effect or clustering standard errors in SPSS
I have a sample of 900 events, where an event includes two firms (Firm A and Firm B). I am running a linear regression with one DV (continuous) and 9 IVs (continuous) (including controls). Many of the ...
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72 views
How to compare two survival percentages for two different populations?
I calculated the 5 year survival of two populations keeping different variable constant each time and got percentages.
I wanted to determine if these percentages were significantly different from each ...
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2answers
93 views
How do I find if there is a significant difference in the number of males and females in a single population?
Also, how do I find if there is a significant difference in the number of males in two populations? In SPSS please!
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0answers
68 views
What statistical methods to use for analysis of a scenario questionnaire?
I've produced a questionnaire with 3 parts, demographics, attitude questions, and then a final section on particular scenarios. I'm looking to analysis people's response to the scenarios - as in what ...
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0answers
213 views
2 samples, t test with multiple dependent variables SPSS
I am attempting to compare two samples in SPSS. I have taken a sample of 350 from group 1 and 350 from group 2. Now, I want to compare these two groups that are identified by a filter variable ...
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2answers
262 views
How do I find correlation measure between two nominal variables?
A survey was made where people chose what they use a certain smiley to represent and entered their country of origin. I have recoded the text responses to numeric.
What form of analysis should be ...
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1answer
145 views
To find significant differences between means using repeated measures GLM
I am new in using SPSS and stuck with General Linear Model [which is just linear model] procedure.
I have 8 cognition variables like latency, thigmotaxis, spatial, quadrant, nt quadrant, proximity, ...
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0answers
297 views
Interpreting SPSS mixed linear model output
I have a problem interpreting the output of the mixed model procedure in SPSS. I found a couple of threads dealing with similar problems, but none helped me solve it.
I have a 2x2 repeated measures ...
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0answers
125 views
Randomly selecting x number of cases from 4 groups - script modification
I managed to get together the code (1) below. It's essentially a monte carlo discriminant function script that also uses oms to output.
It runs a given number of cases through discriminant function ...
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0answers
154 views
Comparing two likert scale answers
we have performed a study asking participants to describe a current method they use to perform various interaction scenarios on computers and a proposed method they would instead like to use. We have ...
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3answers
381 views
“matrix is not positive definite” - even when highly correlated variables are removed
I am running a factor analysis in SPSS and get a "matrix is not positive definite" error from my correlation matrix. I've tried removing correlated variables, but I have to remove all variables down ...
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1answer
98 views
SPSS:While performing ANCOVA, I get a warning: large number of columns may cause integer overflow. How do I resolve this?
SPSS Warning
The large number of columns in the design matrix will cause integer overflow. The large number of columns may be due to too many levels in one or more factors, or to higher-order ...
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0answers
137 views
Mixed model repeated measures, nested
I have a study in which I have 3 groups of crews (4 crews in each group) in
which there are two people (L/R). Each crew experienced 4 lighting treatments (D1-4),
once in one position, and again in ...
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1answer
44 views
A statistic to describe a correlation with progression
I want to see if the proportion of 'I don't know' responses correlates with the progression through the survey. Generally we expect this proportion to increase ...
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1answer
230 views
Comparing groups at different time points within repeated measures study using SPSS
I have done a RCT (randomized control trial) of an intervention (which is of 6 week duration) versus control. The outcome measure (an exercise test) has been tested pre-intervention (Pre), immediately ...
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2answers
93 views
How to analyse three way ANOVA that also has pre-post and one within subjects factor?
I'm currently having a problem understanding on how to enter and calculate my data in SPSS.
I have a three way design in which there are 2 variables each in
Experts vs Novice;
Guided Discovery vs ...
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1answer
115 views
Two-way ANOVA repeated measures
I would like to know, if you got a significant interaction in a two-way repeated measures ANOVA in SPSS, how can you visualize the interaction (especially using syntax)?
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1answer
288 views
Best factor extraction methods, with reference to SPSS
SPSS offers several methods of factor extraction:
Principal components (which isn't factor analysis at all)
Unweighted least squares
Generalized least squares
Maximum Likelihood
Principal Axis
Alpha ...
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0answers
63 views
Two-way Ancova in SPSS
Does anybody know the syntax to do an ANCOVA with two IV and one covariate in SPSS?
Best,
Nuria
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1answer
337 views
Can non normal data be used for factor analysis and multiple regression? If so what is the procedure to justify it?
While I was writing up the analysis in my thesis, I just came across when rechecking my test for normality, that the p-value for most continuous variables was .000, which is less than .05, and it ...
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68 views
merging two studies into a repeated nested design in SPSS
I've got a pretty messy situation: I'm trying to merge the data from two related studies into one analysis but they were designed slightly differently. Both studies took place at the same location and ...
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1answer
120 views
Compare means of two groups with a variable that has multiple sub-group
I was unable to understand how to compare multiple mean values in each group. Within the subgroup the mean values influence each other (If one changes, the other changes automatically).
I collected ...
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1answer
403 views
Performing a biserial correlation on SPSS v21
I have a set of data in which the response variable is continuous and the other independent variables are dichotomous (not naturally occurring).
I think I have to perform Biserial correlation (I an ...
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1answer
357 views
compare means of of multiple dependent variables between two groups
I have two independent groups who travel with different modes. If I want to compare the distance traveled (which is a continuous variable) by different modes for these two groups. How do I compare ...
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2answers
332 views
Analysis and writing up results
I am doing research for my Masters studies and am battling a bit with the statistical side of my study. I used a survey and have captured all the data into SPSS. I have no statistical background, I ...
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2answers
245 views
Generalized Linear Model in SPSS with common values among predictors treated as subpopulations. Why?
I am teaching a class on logistic regression with SPSS. The textbook supplies a sample data set with a binary predictor and two numeric covariates. The sample contains 1000 rows and a number of these ...
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1answer
112 views
Multinomial log. regression in SPSS with a dummy independent variable
This is my test design which is simply a grouping variable:
When I choose to regress a gender variable (w/m) onto this grouping variable with a multinomial logisitic regression model I'll observe
...
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0answers
386 views
How do you interpret the test of between subject effect in mixed ANOVA?
I am doing research on perception and writing styles.
I subjected my participants to 2 type of writing styles and a pre test and post test to measure their perception. I have done a repeated ...
3
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1answer
262 views
Interaction in generalized linear model
I have 2 continuous variables as my predictors and the interaction between them, so 3 effects all together (when I center my predictors only the interaction is significant). I am using a binary logit ...
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2answers
255 views
Linear Regression Analysis using SPSS (I think)
I am trying to conduct a study into whether or not female board presence affects firm performance. My background is accountancy and business NOT maths or statistics and so I don't really understand ...
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0answers
54 views
Factor analysis
I did a principal component factor analysis with varimax rotation in SPSS. 69 variables were reduced to 12 components, but 2 components are blank and without any variable. Namely: all of my variables ...
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1answer
371 views
How to analyze Max Diff via R or SPSS
I am interested in utilizing Maximum Difference Scaling (Max Diff) for a survey, but apart from the Sawtooth software, I was not able to find a good answer on how to best analyze Max Diff.
What is the ...
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0answers
46 views
How do I get individual values of the random effect intercept in SPSS?
I am implementing a random intercept model in SPSS, and would like to obtain the subject-specific values of the random intercept to test it for normality. Does anyone know what's the SAS equivalent of ...
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0answers
104 views
Does SPSS give factor scores for mean subtracted variables?
From the Johnson's book, I can see the orthogonal factor model is as follows:
$X-\mu=LF+\epsilon$
So if I use SPSS for extracting factor scores from a factor analysis of several variables, then am I ...
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40 views
Comparing tests for staging cancer
I am comparing 4 different tests for the evaluation/identification of cancer. One is a continuous variable yielding cut-off values based on both the mean and the median of 5 consecutive measurements ...
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1answer
182 views
Checking normality of residuals in 2x2 mixed methods ANOVA
I am running a 2x2 mixed method ANOVA (with one between-group factor and one within-group factor - time 1 and time 2). I want to check whether the assumption of normality of residuals is met. When I ...
