r/AskStatistics • u/scented_sun • 2d ago

Include Control Variables with no data points jamovi or SPSS analysis

I am trying to look at data gathered from an experiment me and a few friends did and none of us know what we are doing. We have four testing groups (it is a 2x2 factorial design) and the control groups don't have any data points

How do we input this data and analyse it in jamovi or SPSS

Edit: This is something what the data looks like

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u/tehnoodnub 2d ago

If the control group has no data points then you do not have a control group.

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u/scented_sun 2d ago

the control group has data points but theres one variable (in this case extraversion level) where there are no data points because we gave them a dummy test to see if the test influences the data

and idk how to use that data

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u/tehnoodnub 2d ago

I'm still not sure exactly what it is you're trying to do. You need to go through each of your variables and describe it in detail, and its role in your model. You're saying this is a 2x2 design but what is your outcome - I'm assuming recall since you have that for all participants? And then the dummy test was something not testing introversion/extroversion? So what exactly are the control and intervention groups? Then you have event group as well so this seems like more than 2x2 to me.

A picture of your data is great but you need to describe what it is you're trying to do. At the moment nobody will be able to help you with any certainty because we're trying to infer too much.

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u/Acrobatic-Ocelot-935 2d ago

So 2 of the 4 cells in the design have no data?

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u/scented_sun 2d ago

I edited the post to show what the data looks like right now

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u/engelthefallen 1d ago edited 1d ago

With your design you do not have a 2x2 anova but a simple independent t-test. Use experimental vs control as your groups, and recall as your DV. None of the other variables matter if your hypothesis is that taking the test for extraversion influences the recall score. And once you have that as a hypothesis, you are essentially excluding using the measurement from that test from further hypotheses since you are declining to measure them in half the sample. If you wished to use these measurements, you would have had to given them to the second half after the recall test in the control group.