I have 4 data groups: - 3 groups from a 5-point Likert scale (1 ~ 5) - 1 group is binary (Incorrect/Correct -- converted to 0, 1)
I have performed Pearson's r and Spearman's rho with the Likert responses easily enough and they appear to be related to a scatterplot. However, the binary data is giving some strange numbers that don't appear to be showing a true relationship (I'm new to using SPSS so this may be the problem).
An alternative I want advice on in the comparison of means. I am aware of paired t-tests but I don't know if they are suitable or if something else is better suited. I'm especially interested in the relationship between, e.g. a) Perception of x= M:3.12, b) Realisation of x= M:3.95