SPSS (Statistical Package for the Social Sciences) is a proprietary cross-platform general-purpose statistical software package.
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115 views
How do I test the assumptions of a independent two-way ANCOVA with SPSS?
I really need help in testing these assumptions regarding a two-way ANCOVA with SPSS:
Independent variables orthogonal to the covariates
Covariates must have a homogeneity of regression (or ...
4
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1answer
194 views
Different ANCOVA results in R using different functions
before my actual ANCOVA I would like to test whether there is a significant interaction between the IV and the CV as this is one assumption for ANCOVA. I found 3 different ways in R to perform an ...
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0answers
221 views
Is it necessary to calculate Cronbach’s alpha for each sub-test?
I have a data set that includes two sub-tests, each measured using a Likert scale.
I want to test the reliability.
Is it necessary to calculate Cronbach’s Alpha for each sub-test? Or do I have to ...
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1answer
67 views
illustrate interaction without ANOVA, other methods?
I am wondering whether there are acceptable ways to illustrate the presence of an interaction besides using an ANOVA. I can't use an ANOVA because I have unequal sample sizes, and due to the nature ...
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2answers
663 views
Calculating eta squared from F and df
I'm trying to compute ANOVA effect sizes from papers that provide an F value without other information. If I understand correctly, the effect size for a single-factor ANOVA is
$$
\eta {2} = ...
2
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2answers
224 views
How to do repeated measures ANOVA for two groups in SPSS and 12 time points?
I am measuring one parameter (say weight) repeatedly at different time points (say monthly, for 1 year) for two groups (say experimental and control groups). My data looks something like data posted ...
2
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0answers
55 views
ANOVA variable that is both BETWEEN & WITHIN
Does anyone know how / if can you treat an independent variable as BOTH a between AND within subjects variable (ideally in SPSS ANOVA-repeated measures). That is, we have a repeated measures study ...
1
vote
1answer
404 views
Ordinal regression with categorical covariates and predictors
I am trying to do an ordinal logistic regression (ordinal outcome variables with more than 2 categories) with nominal (more than 2 categories for some) predictor variables, as well as nominal (more ...
2
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0answers
188 views
How to cluster standard errors (by country) using SPSS?
I'm trying to obtain robust standard errors as my regression residuals seem to be correlated... My sample data has 8 countries and I would like to cluster the standard errors by these 8 countries ...
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0answers
165 views
Help on Regression Analysis (ROC, multinomial)
I am currently looking at continuous data and seeking a correlation with the presence (and severity, ie, normal, mild, moderate, severe) of a disease entity. Now, so far, running Spearman on SPSS, ...
1
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1answer
77 views
Performing correlation analysis on a variable with seperate count-columns
I don't know if the title explains it but I'm looking at a variable that has two options in it. As in, "Presence of Condition" has two some headings listed "Yes" "No" with entries of large numbers ...
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1answer
192 views
Comparison of Cox models
I am new to statistics and SPSS v 20. I am doing survival analysis - KM and Cox regression with SPSS. I am trying to make Cox models with different variables - clinical, genetic etc. I am interested ...
2
votes
1answer
173 views
Justification for low/high or tertiary splits in ANOVA
I have two groups of participants and they all took the same measurements.
When I perform a median split on one of the measurements to test my hypothesis about an interaction, the dependent ...
3
votes
1answer
530 views
Categorical Principal Component Analysis - using Count, Continuous, Ordinal variables together
I have some variables and I want to reduce their number for further analysis. I initially thought of combining them using factor analysis. But since the variables are of all kinds (rating, count, ...
2
votes
1answer
65 views
When are tertiary splits un/justified?
I'm studying neuroscience and have a question about presenting some data. I would like to know if tertiary splits are acceptable when the variable in question is normally or not normally distributed. ...
1
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2answers
388 views
How do I do nonlinear generalized estimating equations in SPSS
Say I have two conditional media for bacteria growth: a bacteriocidal drug and control. I want to see the effect of my bacteriocide on culture growth, so I set up 6 flasks: three with drug, three ...
2
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1answer
397 views
Testing anova hypothesis with contrasts in R and SPSS
Using data and answers from this question I was trying to test the hypothesis $H_0:-3\mu_1-\mu_2+\mu_3+3\mu_4=0$
...
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0answers
88 views
How can I estimated a mixed logit model in SPSS? [closed]
I am doing a psychological experiment and I have 2 groups of people knowing different language and I am going to give them Simon task. I want to use mixed logit model to study the effect of ...
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0answers
181 views
Which test to use in a single group pre- and post-treatment analysis
I am attempting to analyse pre-existing data (using SPSS). I have one group of participants, 4 quantitative, non-parametric outcome measures, and am looking to see if there is a change in outcomes ...
5
votes
2answers
389 views
Cox regression when reference group had zero events
I would appreciate some advise on an a problem I ran into.
I use SPSS for statistical analysis of a study.
The study look into how a blood test predicts mortality with patients followup of 1 year. ...
1
vote
1answer
172 views
How to model repeated measures with time-varying covariates in SPSS?
I wanted to test the effectiveness of a particular type of "talking" therapy on depression. I envisaged selecting ONE group of people and measuring their heart rate and scores on depression scale for ...
2
votes
2answers
729 views
Comparing regression coefficient with same model but two distinct samples
I am currently completing my dissertation. My study is cross-cultural and looks at predictors and inhibitors to adoption of technology in two countries (Thailand and Australia). I have a hypothesised ...
1
vote
1answer
249 views
Clustering of time series
I have a set of almost 1600 time series on 2 years which I want to group into clusters. Do you think this is possible using k-means? Which method do you advice me to use? Is this possible at all using ...
0
votes
1answer
387 views
What does it mean to have an F-value of .000 and Sig. of 1.000 (in SPSS)?
We conducted this very simple 2x2 Between Subjects Factorial Design Experiment, where the DV were their answers to a classic insight problem. Since there is only one correct answer to the problem, the ...
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0answers
25 views
Interpretation of a non-significant Rsquare change in multiple regression [duplicate]
Possible Duplicate:
Significance of coefficients in linear regression: significant t-test vs non-significant F-statistic
So in running a multiple regression in SPSS with 6 continous ...
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0answers
76 views
Automatically compute variable value upon input in SPSS [closed]
I have a table with two columns a and b. I manually enter data into a cell in column a, and I want the corresponding cell in column b automatically show a value caluclated from my input in a.
E.g. a ...
3
votes
2answers
208 views
Converting SPSS syntax for regression to Stata commands
I am running a series of regressions to eliminate the effects of IQ, language ability and age from my variables (task performance). To do this, the variable is entered as the dependent variable (e.g. ...
2
votes
1answer
2k views
How do you estimate correlations between ordinal and binary data in SPSS?
I'm struggling with my lab report. I have a questionnaire which contains Likert responses (1-7) as well as questions that require only yes or no answers. I want to see if there is a correlation ...
1
vote
1answer
670 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 ...
2
votes
2answers
111 views
Factor analysis or just stick with compare means?
I would be grateful if somebody could assist me with the questions below This is for my dissertation (I am relatively new to SPSS and indeed to statistics).
I have a small set of cases (N=41) of ...
2
votes
0answers
235 views
Seeking an effect-size measure for simple effects in binary logistic regression in SPSS [closed]
I am trying to get an effect-size measure for simple effects in a binary logistic regression. I am using the GENLIN procedure in SPSS; here is the syntax:
...
2
votes
0answers
157 views
Mean Survival Time Cox Regression
I am new at using survival analyses. I am writing an article on differences in recidivism for an experimental and control group of offenders. Due to differences between the groups in gender, I have ...
3
votes
1answer
166 views
How many factors to retain in EFA?
I have multiple measures from a scale and I want to determine the best factorial structure using EFA, in SPSS. I don't understand if I can retain the number of factors that I want to retain because ...
5
votes
1answer
323 views
How to calculate weighted Hedges' g effect size in meta-analysis when some effect sizes share a control group?
I am trying to do a meta-analysis using Hedges' G as the effect size.
Questions
Some of the studies have different groups but the same control group. How does this change the computation and ...
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vote
1answer
1k views
How to calculate sum of squared errors (SSE or SSR) with STATA12 software?
I have a techincal issue with stata: I need to calculate the SSE of a regression model, but the automatic output just gives me RMSE; I need SSE of this constrained model because I have to test if this ...
2
votes
2answers
548 views
Whether to use correlation matrix between latent variables or raw data as input to SEM?
I have a fairly large model - a total of 8 latent variables and each one has 10 items (observed variables). Drawing this model is a mess (there is a mediation effect as well).
Is it better to just ...
2
votes
0answers
486 views
R vs. SPSS Kolmogorov-Smirnov test
I was recently given the following data.
7 1 6 6 2 8 3 7 4 6 3 3 1 8 4 5 9 3 2 4 1 4 4 3 6 3 4 2 3 2 7 2 7 4 2 4 4 4 3 2 2 4 5 8 6 4 3 1 5 5
I then ran a KS test ...
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vote
1answer
597 views
What does a chi-square test mean when no p-value is returned?
I did multinomial logistic regression using SPSS chi-square is .000 , df is 0 and significance =.
So what does it mean significance = .?
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votes
1answer
568 views
How to get 1, 3 and 5 year KM survival for large database using SPSS?
I have large database of hundreds of thousands observations. When I used spss to analyze KM survival, it gave me mean and median survivals with 95 % confidence interval. However, I need 1-, 3- and 5- ...
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votes
1answer
94 views
How can I change the scores to make interaction effect in two way ANOVA significant?
My question is how to make an interaction effect become significant in two-way ANOVA.
If my main effect A has an F value of F(1,80)=25.5 for example, and my main effect B has an F value of ...
6
votes
1answer
245 views
Wald vs. LR $\chi^2$ tests in SPSS generalized linear models
I'm using the generalized linear models function in SPSS with a normal distribution and identity link function. If I choose the likelihood ratio $\chi^2$ statistic, I get the same results as the ...
4
votes
1answer
634 views
Interpreting multiple correspondence analysis
I am interested in exploring how different characteristics of national pension systems are related to each other. I have used MCA for a dataset in which the rows are countries and the columns are ...
0
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0answers
199 views
nonparametric multiplicative regression (nonparametric logistic regression) in SPSS [closed]
How can I perform nonparametric multiplicative regression (NPMR, nonparametric logistic regression) in SPSS? Can you let me know the procedure step by step?
1
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0answers
239 views
Mixed linear model with repeated measures in SPSS
I'm trying to run a mixed linear model analysis with SPSS. When I try to run the analysis, SPSS gives the following error message: ...
0
votes
1answer
137 views
Comparing means - 2 repeated measures variables, controlling for covariate with heterogeneous slope
I have a 2 level repeated measures DV of accuracy, and a covariate of response bias. As response bias increases, accuracy level 1 increases while level 2 decreases. I want to see if there is a ...
2
votes
0answers
210 views
Split-split-split plot cross-over design… is this even possible?
I'm doing statistical analysis on a psychology study I ran a short while ago, and I'm starting to think that I've designed myself into a corner.
In the study, we measured participants' pointing ...
1
vote
2answers
365 views
What significance level is required with a small data set?
My apologies if this has been answered here. It's my first time here.
I am a developer by trade. I am not really into this thing, but I was asked to do some data simulation using SPSS. But I am not ...
3
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0answers
363 views
How do I estimate a repeated measures ANCOVA in R and SPSS?
I'm currently running a perception experiment:
DV: error (this in degrees- how much an observer was away from the real answer)
IV: the time bin (5 levels) in which the unique stimulus appeared
...
0
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0answers
130 views
How to filter missing time-series data for some, but not all, series? [closed]
For my paper I have collected data of companies for a period of 10 years. Some companies however, do not have data for all years but for my paper I need only those companies that have data over all ...
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0answers
107 views
Oversampling in SPSS [closed]
I have a sample with an unbalanced binary variable.
I'm trying to balance it by oversampling the 1's. Is there any form to do an oversample in SPSS?
