I am conducting research for my master's thesis regarding the phenomenon of Hindsight Bias. I have four experimental conditions in which the DVs include foreseeability and inevitability, and they are measured three times each in each experimental condition. Both DVs are measured with a 5-point Likert scale. In that case, you can say that both DVs are repeated measures.
My hypotheses make pairwise comparisons between the experimental conditions. In some cases, for instance, because some hypotheses only concern the effect of a specific manipulation on one of the DVs (for example foreseeability), I only compare the concerned experimental conditions with each other regarding that one DV. In such a case, I use a one-way repeated measure ANOVA in which the concerned DV (measured three times) is the within-subject factors and the concerned experimental conditions are the between-subject factors.
In one hypothesis regarding two experimental conditions, I expect that both DVs are being influenced at the same time by the manipulation. For such a situation, I wanted to integrate both DVs into the statistical analysis and I can't seem to find a proper statistical procedure in SPSS that considers both DVs and their potential interaction, their respective repeated measures and the between-subject factor (the experimental conditions) at the same time.
Does anyone have a piece of advice concerning the aforementioned issue? I would be really grateful for your help. I hope my explanations were somewhat clear enough.