I have a conditions file with 9 rows, each specifiying the position of a block on the screen. I want to create a sequence of those blocks, with the sequence varying in length (selecting between 3 and 7 rows of the file each loop).
I first tried
in the selected rows box (where Length is specified from a conditions file). That worked in creating sequences of all the specified lengths in a random order, but that created repeats in the trial selected, as discussed here:
I attempted to follow these instructions. The result is that it selects the same 4 rows of my conditions file, and presents them in a different order on each loop.
Is there a way to get it so that each loop it selects a random length (either specified in a conditions file or as a variable), and then selects this number of rows from the conditions file without replacement?