I want to implement a simple staircase procedure. I have a series of blocks of trials that get progressively more difficult. Using macros at the block level, I can implement a 3-down, 1-up staircase, so that if the participant gets 3 trials correct the experiment goes to the next hardest block, and each time a response is incorrect the experiment goes to the next easiest block.
However, my problem comes in how to end the experiment. Typically a staircase procedure should end after a certain number (say 10) of reversals or changes in difficulty level. In my case, after a certain number of transitions between blocks. How can I implement this is Superlab 4.5?
More specifically, the options for setting expressions seem very limited (i.e, “Time since start of block/experiment, trials presented in this block”). It seems that I need some flexibility to tell Superlab that I want to track the number of reversals…
Thanks for any help.