Dear all,
My question is about randomisation of blocks.
I have a total of 17 blocks of which 9 blocks should be displayed to each participant. A certain block is supposed to come in fifth place each time as an attention task.
Is there a way to approach this issue in a practical way?
If I run only one randomisation, then the attention task does not always appear.
I have tried to run two full randomisations with 4 blocks + attention task + 4 blocks each, but then I have the problem that the blocks can appear twice.
And if I divide all the blocks into 2 groups of 8 blocks, with a randomisation of 4 blocks each, then some of them always appear at the beginning or the end of the survey, which seems unfavourable.
Thank you very much for your suggestions.
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Use two randomizers with the attention block in between.
In the first randomizer, add groups for all eight blocks and under each group place a block and set an embedded data field to flag that the block was displayed (e.g., block1 =1). Display 4 of 8 groups.
In the second randomizer, add branches for all eight blocks to display if the block as not been seen (e.g., block1 not equal to 1). Display all 8 branches. Only the blocks that weren't seen the first time will display.
Thank you TomG!
You helped me a lot with your answer.
I just tested it and it worked wonderfully 
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