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How to present image files randomly from three separate categories
The survey design has two parts. In part 1, participants will see 48 images presented randomly and respond if the image is either 'indoor' or 'outdoor'. In part 2 participants will be presented with 144 images (the 48 from part 1; 48 similar to those in part 1; & 48 new) and be asked to rate each image in part 2 as either Old, Similar, or New.
I need to set constraints so that no more than 3 images from either category are presented in a row and that all 144 images are presented only once.
How can I do this? I have tried using the randomiser and grouping but it will only present one group at a time and not select randomly from the three groups.