hi list,
I have two conditions, one contain 2 stimuli and the other 8. The difference between stimuli within certain condition is vey small, and could be omitted in further analysis if they're treated equal. Now I have two choice: optseq2 --ntp 160 --tr 2 --psdwin 0 14 / --ev s11 2 8 --ev s12 2 8 --ev s13 2 8 --ev s14 2 8 / --ev t15 2 32 / --ev s21 2 8 --ev s22 2 8 --ev s23 2 8 --ev s24 2 8 / --ev t25 2 32 / --nkeep 6 --o pl1 --nsearch 10000 or optseq2 --ntp 160 --tr 2 --psdwin 0 14 / --ev s 2 64 --ev t 2 64 / --nkeep 6 --o pl2 --nsearch 10000 Obviously, the first one would need more test runs, which in fact was nearly 2 hours for the subjects . And the second one need only 1/4 time, but is risky. I am afraid it would induce difference between stimuli within condition. Do you have any suggestions on it? Thanks a lot.
Peng