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Staircase Procedure
Hi,
I have been using Direct RT for a while now and really appriciate it. However, I now want to do implement a staircase procedure. Can this be done in Direct RT?
Essentially what I want to measure is a discrimination threshold. So I am presenting a stimuli that gradully changes (i.e. a face that goes from attractive to unattractive) the participant then has to discriminate (i.e. attractive or not attractive) If there response is [U]attractive[/U] then the next face is more "unattractive" while if the response is unattractive then the next stimulus is a more attractive. I know this can be achieved by using the skipping function, but how do I end the experiment once a certain number of responses have been given?
Apologies for the long thread,
Scott