SPSS (Statistical Package for the Social Sciences) is a proprietary cross-platform general-purpose statistical software package.
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12 views
Post-Hoc for 2x6 Mixed Design ANOVA
I have run a 2 (gender) x 6 (A) mixed design ANOVA. While I found a main effect for A, the interaction was also significant. While attempting to run post-hoc through SPSS, it said that I was unable to ...
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38 views
Goodness of fit vs. significance
If you had two models - one with a better fit, and one with predictors of higher significance - which one would you choose?
Keep in mind that both models are considered a good fit. One has a 3% ...
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3answers
405 views
How should I analyze data with repeated measures variables and integer between-subject factors?
I ran a study, where a single variable was measured repeatedly for each participant, under different conditions. Analyzing this data with SPSS has been rather straightforward, by using the General ...
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0answers
15 views
Partial $\eta^2$ in multivariate analysis
I wonder why the partial $\eta^2$ values are so small in my SPSS GLM Multivariate analysis. I have 3 DVs and 5 IVs and the sample size is large (n=5000). The main effects and significant but the ...
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1answer
61 views
Covariate vs. factors
I have a survey problem where the dependent variable (ordinal) is in Likert-type scale (i.e. 1 to 5 from most satisfied to most dissatisfied) and two sets of independent variables. One set has 7 IVs ...
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20 views
mediation analysis interpretation
I am carrying out a mediation analysis using PROCESS in spss. According to Field a mediation effect occurs if the confidence intervals for the indirect effect do not include 0 - this is the case but ...
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1answer
197 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 ...
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1answer
36 views
Repeated Measures ANOVA with several measures entered together: how to find main effect
I've run a 2 (treatment and no treatment) x 2 testing occasions (pre and post) Repeated Measures ANOVA. In addition, I entered several tests given at both time points, so under the Repeated Measures ...
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2answers
61 views
Is partial correlation possible after Spearman's correlation?
I have two test groups that conducted an online task measuring response times (avg, avg(congruent), avg(incongruent)). I expected one group to be faster than the other but it turned out exactly the ...
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0answers
19 views
GLMM in SPSS: what does significance of the fixed coefficients mean?
I conducted a GLMM analysis in SPSS with y~a+b+a*b.
The output result contains two tables:
the fixed effects, for which the main effects and the interaction ...
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2answers
98 views
Differences in kurtosis definition and their interpretation
I have recently realised that there are differences in the kurtosis values provided by SPSS and Stata.
See http://www.ats.ucla.edu/stat/mult_pkg/faq/general/kurtosis.htm
My understanding is that the ...
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1answer
39 views
Setting up data for MANOVA in SPSS
I do not understand how to arrange my data in SPSS for running MANOVA.
I have 6 groups of participants that have rated 100 pictures on 3 different dimensions (dim1, dim2, dim3).
What I don't ...
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2answers
75 views
Comparing two sets of time-series (physiological measures)
I need help in finding which statistical approach I need to use.
I have two groups: G1 (disease) and control.
For both groups we measured their blood level every 10 minutes: 0 to 650 min.
We are ...
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3answers
40 views
Interpret significant interaction but no main effect in repeated measures ANOVA
I have a model in which two groups are measured on one DV at pre- post- and 3 months following an intervention (the control group did not receive the intervention). I have an interaction effect, which ...
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1answer
543 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
81 views
What does it mean to have negative values for both lower and upper bounds on a 95% Confidence Interval on ANOVA?
My data shows 95% CI = [-1.07, -0.40], what does the negative sign indicate and how do I interpret the data? as I think it is significant for not capturing the value of 0.
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0answers
16 views
How to compute chi-square post hoc multiple comparison tests using Complex Samples module in SPSS version 20
This questions refers to computing cross-tabulations and chi-square tests of independence through the SPSS complex samples module available in SPSS versions 19 and up. I am able to compute the overall ...
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1answer
56 views
Why do Minitab and SPSS give opposite results in Ordinal Logistic Regression?
I run an ordinal logistic regression model using both SPSS and Minitab. The dataset is exactly the same. The results are exactly the same, but in opposite directions. I have not manipulated default ...
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0answers
38 views
Suggestion for statistical analysis. Is generalized estimating equation (GEE) a good option?
I have two groups a G1 and control. For both groups we measured their cell counts every 10 minutes: 0 to 650 min.
We are trying to find:
Difference (in cell counts) between G1 and controls - ...
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1answer
159 views
Correlate continuous data with dichotomous data, with correction for an ordinal variable?
I want to study association b/w continuous data (age) and dichotomous data (complication: yes/no), with "correction" for an ordinal variable (intra-operative nerve laesion).
I have a database of 427 ...
6
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1answer
72 views
CHAID vs CRT (or CART)
I am running a decision tree classification using SPSS on a data set with around 20 predictors (categorical with few categories). CHAID (Chi-squared Automatic Interaction Detection) and CRT/CART ...
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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 ...
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1answer
171 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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2answers
50 views
Finding latent variables in 7 dichotomous variables
I have read other posts on conducting Factor analysis (FA) with dichotomous variables and although it appears clear that FA done in the default way is not appropriate, I am still unclear about a few ...
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1answer
166 views
Mean regression factor scores and attributes cross tabulation yields. Why are all expected signs reversed?
I ran a factor analysis on 20 reasons for purchasing 4 different Goods. These are ranked on a likert scale from 1-5 with 5 being the "extremely important case", 4 important case, etc. I extracted 4 ...
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71 views
How to correctly estimate statistical significance of regression coefficients?
Say that I want to determine the statistical difference between the coefficients derived from the FF three factor model of two portfolios (Spe and ...
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1answer
86 views
Replicate ANOVA with linear mixed model in SPSS
I am trying to replicate a mixed ANOVA using a mixed model, but the mixed model is giving me different results. I'd like to know why, and how to get them to give the same results, assuming this is ...
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1answer
60 views
How to calculate validity of questionnaire in SPSS?
I have 3 types of questionnaires,
A 15 item scale with each item on a 7-point Likert type scale.
Six subscales each containing different number of items
21 subscales each containing 4 items.
...
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2answers
128 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
2k views
How to interpret factor scores saved as Reg variables in SPSS?
How do I interpret the factor scores that I save as Regression variables with SPSS? I have 30 attribute variables with reponses such as extremely important, very important, important, not that ...
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2answers
73 views
How to test a curvilinear relationship in a logistic regression
I was looking for some information about curvilinear relationships (quadratic function, to be precise) in logistic regression online, and couldn't really find much about it.
I am interested if that ...
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1answer
32 views
Data analysis using matched design - SPSS help
I would love to get some advice regarding the following please!
I am involved in a study that is looking at cognition across 3 separate groups (1= the clinical group of interest; 2= clinical control ...
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1answer
41 views
Interpreting multivariate tests in repeated measures
I have a within subjects design with 4 DVs and I ran a repeated measures analysis on SPSS. My DV is a physiological measurement and is not expected to be linear.
My multivariate Wilks lambda is ...
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0answers
26 views
How to test for significant difference between 2 binary variables in one sample [duplicate]
I would like to test if there is a significant difference between the pre-test and post-test in a dichotomous variable (0 = "False", 1 = "True"). I'm using only one sample of 30 subjects.
So, my 2 ...
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1answer
31 views
How can I find tendencies in specific cases between two groups?
So, I'm doing this project where we are investigating whether social networks can influence peoples distinctiveness. Briefly summarized, we have primed a group with a social media and another is the ...
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3answers
94 views
Difference between binomial, negative binomial and Poisson regression
I am looking for some information about the difference between binomial, negative binomial and Poisson regression and for which situations are these regression best fitted.
Are there any tests I can ...
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2answers
151 views
What are the implications of a perfect fit model?
I perform logistic regression with a relatively small dataset (N=65), using 12 parameters (11 variables, one constant, no interactions), which results in a perfectly fitting model (in SPSS). I have a ...
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1answer
64 views
Visualizing an interaction effect of a Logistic Regression Analysis (in SPSS)
What would be the best way to go about visualizing an interaction effect of a Logistic Regression Analysis (preferably using SPSS)?
There is a significant interaction between one interval (HDI) and ...
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3answers
3k views
Difference between generalized linear models & generalized linear mixed models in SPSS
I am wondering what the differences are in SPSS between
analyze-> generalized linear models-> generalized linear models &
...
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2answers
100 views
Choice between Type-I, Type-II, or Type-III ANOVA
We have a dataset with three variables (dV: self-reported measure on scale 1-5, assumed to be metric; iV1: factor with 4 levels; iV2: factor with 8 levels). We are interested whether the dV differs in ...
2
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1answer
438 views
Multiple Paired samples T-tests?
I'm trying to determine the effect of taking a training course on various aspects of being a good quality worker. I have pretest and post test data on 7 different ways job performance can be viewed. ...
2
votes
2answers
486 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 ...
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1answer
257 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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0answers
30 views
How to code separate data for a regression parameter in nonlinear regression?
Say I have a bunch of measurements over a range of my independent variable (example data at the end) and I want to fit them to an equation such as a classic pharmacological inhibition curve:
...
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2answers
92 views
Bonferroni adjustment in SPSS - what does it do?
first post, so go easy...
I'm probably being a bit simplistic here, but from what I understand the Bonferroni post hoc test is simply when we adjust the alpha to account for inflated error when ...
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1answer
83 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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0answers
43 views
IBM SPSS plot multiple variables [closed]
I have time-on-task data for three different designs from a website usability study. How can I visualize multiple variables on a bar chart or a stacked bar chart(clustered by user experience) with ...
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0answers
39 views
Multiple regression with dummy variables
I need to calculate MR but my data consists of many dummy variables. I had a question in my survey that asked for the budget/month. But instead of giving the option to fill in a value, I offered ...
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1answer
44 views
Does alpha need to be adjusted for running Mann-Whitney U test independently for two dependent variables?
I am comparing two group means on two dependent variables (aggression and stress levels) using Mann-Whitney U test by SPSS. My question is that do I need to adjust the alpha level for this?
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0answers
14 views
Reduce Sample Size (Categorise??) [duplicate]
I have been looking for an answer to my question but havn't been able to find any literature documentation or help in regards. I have a large dataset which I need to further analyse. Because of this I ...
