4
votes
1answer
326 views

Post-hoc test in two-way ANOVA

I am doing a two-way independent ANOVA using type of organisational change (5 levels) and job level (7 levels) within the organisation as the factors (in SPSS). I followed Andy Field's procedure ...
1
vote
0answers
89 views

In SPSS two factor ANOVA, how to compare control groups across other factors?

I have two factors: Brainregion (4 levels) and Group (5 levels). Glutamate is my dependent variable. I am running General Linear Models in SPSS (two factor ANOVA). Can I get the output in such a ...
0
votes
1answer
176 views

Post-hoc chi-squared multiple comparison tests using complex samples module in SPSS v. 20

This questions refers to computing cross-tabulations and chi-squared tests of independence through the SPSS complex samples module available in SPSS versions 19 and up. I am able to compute the ...
0
votes
2answers
8k 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 ...
2
votes
2answers
936 views

Post-hoc for 2x2 mixed design ANOVA using SPSS

I am analysing an experiment run with 20 participants using a $2\times 2$ mixed design ANOVA. The experiment has one within subjects variable A with two levels (a1, a2) one between subjects ...
2
votes
1answer
145 views

How can I perform post-hoc tests to the ANOVA performed during K means clustering?

If I have highly dimensional data and perform k means clustering, I can end up with clusters that differ more on some axes than others. SPSS provides the option to return an ANOVA for each variable, ...
3
votes
1answer
783 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 ...
0
votes
0answers
2k views

Pre-test, post-test multiple comparisons

This feels like it should be a very straightforward stats analysis but I'm struggling to find a solution. I have a data set made up of pre- and post-test continuous data values taken from multiple ...
5
votes
2answers
4k views

Post hoc test in a 2x3 mixed design ANOVA using SPSS?

I have two groups of 10 participants who were assessed three times during an experiment. To test for differences between groups and across the three assessments, I ran a 2x3 mixed design ANOVA with ...
1
vote
0answers
673 views

Difference between MANOVA “post-hoc” tests of between subjects effects and between subjects one-way ANOVA?

When I run a 2x4x5x6 (Sex*AgeGroup*HighestDegree*Ethnicity) MANOVA (with 20 dependent variables) in SPSS, it presents tests of between subjects effects for each of the IVs and their interactions after ...
4
votes
3answers
3k views

How to do post-hoc tests with logistic regression?

I looked at whether participants recycled after being subjected to a given message. There were three groups: a Control group, group A, and group B. Since my dependent measure was dichotomous ...
0
votes
0answers
3k views

Why does one get a 0.000 Mann-Whitney U value (not p-value) etc.?

1) Is it okay to run a Mann-Whitney U test on unequal sample sizes i.e. two groups (N=11, N=12)or is there an alternative test? 2) What does it mean when one obtains a zero value for a Mann-Whitney U ...
1
vote
3answers
5k views

Non-parametric test for unequal samples with subsequent post-hoc analysis?

Is it okay to perform a Kruskal-Wallis on four unequal samples? Further to this, is there a subsequent pair-wise post-hoc suitable for two unequal sample sizes?
7
votes
3answers
7k views

Sidak or Bonferroni?

I am using a generalized linear model in SPSS to look at the differences in average number of caterpillars (non-normal, using Tweedie distribution) on 16 different species of plants. I want to run ...
1
vote
0answers
2k views

How do you report Kruskal Wallis one way analysis of variance and post hoc results following APA 6th standards?

How do you report Kruskal Wallis One Way Anova and post hoc results according to APA (American Psychological Association) 6th ed. standards? I have tried to find a template for reporting the results ...