2x2 Between-Subjects ANOVA in SPSS

This video demonstrates how to perform a 2x2 between-subjects ANOVA in SPSS. It covers parametric assumptions such as normality and homogeneity of variance. You will see how to report the results following APA guidelines. It also outlines what you can do if the parametric assumptions are violated and you have to focus on non-parametric pairwise comparisons.

[@Mashozi1]

James I found this video very thorough. Thanks so much. Need to watch a few times. To get my head round this

[@edithfabian2652]

Thanks James for your ever ready availability!

[@taniaaquino896]

This is really helpful James!

[@jamesbartlett5474]

Good to hear :)

[@itratbatool9907]

Thanks so much for this informative video, can I ask a question please?
I have two conditions (2 independent variables) and I am interestedin finding the univariate, just the way you did. I am confused a little.
When I insert the values in SPSS, I do it for the first group (50 individuals) and then I start with the second group from the 51st row in SPSS. The values for both the groups is (1,2) and (3,4) respectively. However, I don’t know how can I calculate interaction of these two independent variables. I cannot put the second independent variable within the same row as of first because the responses for the dependent variables are different for both the groups. So I need to have 100 rows to put all the responses. Sorry, I’m beginner and I would appreciate if it’s possible to advise me a little please. Thanks

[@jamesbartlett5474]

If I follow correctly, if you have 100 participants in total, you would need 100 rows of data. If you have two between-subjects IVs, this means your participants were split into two groups for one IV and two groups for a second IV. This means you would have one column for IV1 showing which of the two groups participants are in, a second column for IV2 showing which of the two groups participants are in, then a third column for your dependent variable.

[@mathildearctander1282]

How do you do anova when there is 9 independent variables and 1 dependent variable in the analysis?

[@jamesbartlett5474]

ANOVA with 9 IVs is going to be possible but incredibly difficult given the sample sizes required to do it justice. Every time you add, it increases the number of main and interaction effects. If its fully between-subjects, you would just need 9 columns containing your IVs and one column for your DV.

[@ShazWag]

How many data points does each participant need for a 2x2 independent Anova using SPSS? Please somebody help. My brain's frying 🙏🏼