How to specify an ANOVA model in SPSS with nested repeated measures factors

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Question

I have an experimental design where subjects in each of 2 groups were exposed to tasks under 3 different conditions of difficulty. Each subject performed each task 4 times under each difficulty condition, for a total of 12 trials per subject. The 4 replications under each difficulty condition are considered a random factor nested under difficulty. Subjects are nested within groups. I have the data structured so that each subject is a single case and the 12 scores for each subject are held in12 variables, Y1 to Y12. am trying to run the analysis of variance with a multivariate setup for repeated measures (Analyze->General Linear Model->Repeated Measures), but I do not see how to specify the nesting of the 4 trials in each difficulty condition.

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Modified date:
16 April 2020

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