Help with Nesting two Randomiser for Within Subject design

Question

Hi,I am running a within-subject study that requires a nested randomization. Right now I have 10 blocks which are all randomised so that participants view them in different order. However, within each of these blocks I want the participants to see images in random order. Specifically, I want to randomly assign one image to each block and if image is assigned to a block then it should not appear in another block again for that particular user. I have followed the approach given by @TomG to use branching an embedded data. However, using this approach, I find that some images are shown to the user twice. Below  is a screenshot of my current design. I hope someone will help as I am really stuck on this for days. Thank you in advance for your help.

SaurabhPujare_Ugam · Answer

Hi @Rufai,Nice to e-meet you.Based on my review, I believe you are almost their with the solution. You can update the setup as below to get the desired output:-ASSIGN THE IMAGE FOR EACH BLOCKSince you are having 10 images which are to be displayed randomly, easiest approach is to create 10 randomizers.ASSIGN BLOCK RANDOMLY:​​​​​​​INSERT ALL BLOCKS IN RANDOMIZER ELEMENTMAKE SURE TO USE APPROPRATE EMBEDDED DATA CARRYING IMAGE IN THE RESPECTIVE BLOCKEX. BLOCK 1 SHOULD HAVE EMBEDDED DATA: Block1_ImageHope this solutions helps :)

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