Hello statistics experts,

I have 3 columns of data.

Column 1: participant name Column 2: score in session 1 Column 3: score in session 2

There are 13 lines in each column.

I need to compare data in column 2 to column 3 using ANOVA. I am not sure whether I should use a One-Way ANOVA or a regular one.

Either way, in both cases, errors occur in my statistics software. For example, Jamovi says that the One-Way ANOVA can't be done because there aren't enough observations. For the regular ANOVA, it gives me the error "residual sum of squares and/or degrees of freedom is zero, indicating a perfect fit."

This is using Jamovi, although I also can't seem to make it work in JASP.

I am new to this and I would like to know what I am doing wrong.

What are the basic rules of doing a (One-Way) ANOVA analysis? Which column(s) should be the fixed factor(s) and which should be the dependent variable(s) in my case?

I would much appreciate any input on this.

Thanks!

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