Im trying to create a survey that has a between-subject variable (for example, HIGH/LOW attractiveness) and a within-subject variable, call it humor- with three levels- none/pos/neg.
each participant is randomly assigned either to high/low condition. then, for the within design i have two sets of 3 pictures (each set either high/low attractiveness) and three sets of 3 texts each,one for every humor level.
I want that for each level of humor participants will see a picture paired with one of the 3 texts (randomly chosen) and then a followup matrix question. problem is i want each participant to see each picture once without return. plsss if you can help me it'll be life saving.
Question
HELP randomizing a mixed variable

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