Questions about miniblocks,stimulus onset asynchrony,and present stimuli after a sound ends

[Peter Quain]

how is it possible to have a SOA of 0ms? ... maybe an ISI?

At 03:43 PM 8/03/2012, you wrote:
>1. I read the tutorial but didn't find the solution to dividing trials
>into miniblocks.I have 66 trials in total and I want to randomly
>assign them into three blocks each with 22 trials.
>2. I have three different SOAs, 0ms, 120ms, and 400ms, as an IV. I
>need randomly insert an SOA (which is accompanied by a blank screen)
>between the prime and target stimuli.How can I do that within 3
>miniblocks?Given 66/3=22 but 22/3 is not an integer, I want to divide
>the SOAs among all trials but not in each miniblock.
>3. My priming stimulus is a sound and my target stimulus is a
>picture.For the SOA inserting btw the prime and target,I want it to
>start immediately after the sound ends.Since the sound stimuli are of
>different durations,how can I tell E-Prime to detect the end of each
>priming sound?Thanks a lot!
>
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