By ttyelnv - 8/22/2023
Hi Dave,
I am wondering if I can randomize the order of several trials with the list function?
In my experiment, every trial contains a movie file, as well as two markers for the movie (one for the recording with biopac, and another for the recording with eyetracker).
I have eight movie trials in total, and I'd love to randomize the order of presentation of each movie in the experiment. I also want to have a fixation cross between the transition of each movie trial.
At the moment, I have created a list attribute containing all movie trials:
<list movielist>
/items = (trial.movie1, trial.movie2, trial.movie3, trial.movie4, trial.movie5, trial.movie6, trial.movie7, trial.movie8)
/selectionmode=random
/replace = false
</list>
If I create the following block, will inquisit randomize the order of movie trials without replacement? If not, is there a way to achieve randomization in this case? I have thought about using the item attribute, but I do need the markers for each movie file. Therefore, the item attribute is not suitable in this case. Thank you in advance for your help!
<block experiment>
/trials= [1=trial.fixation; 2= list.movielist; 3= trial.fixation; 4=list.movielist; 5 = trial.fixation; 6 = list.movielist;
7=trial.fixation; 8=list.movielist; 9 = trial.fixation; 10=list.movielist; 11= trial.fixation; 12= list.movielist;
13 = trial.fixation; 14 = list.movielist; 15= trial.fixation; 16 = list.movielist]
</block>
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By Dave - 8/22/2023
+xHi Dave, I am wondering if I can randomize the order of several trials with the list function? In my experiment, every trial contains a movie file, as well as two markers for the movie (one for the recording with biopac, and another for the recording with eyetracker). I have eight movie trials in total, and I'd love to randomize the order of presentation of each movie in the experiment. I also want to have a fixation cross between the transition of each movie trial. At the moment, I have created a list attribute containing all movie trials: <list movielist> /items = (trial.movie1, trial.movie2, trial.movie3, trial.movie4, trial.movie5, trial.movie6, trial.movie7, trial.movie8) /selectionmode=random /replace = false </list> If I create the following block, will inquisit randomize the order of movie trials without replacement? If not, is there a way to achieve randomization in this case? I have thought about using the item attribute, but I do need the markers for each movie file. Therefore, the item attribute is not suitable in this case. Thank you in advance for your help! <block experiment> /trials= [1=trial.fixation; 2= list.movielist; 3= trial.fixation; 4=list.movielist; 5 = trial.fixation; 6 = list.movielist; 7=trial.fixation; 8=list.movielist; 9 = trial.fixation; 10=list.movielist; 11= trial.fixation; 12= list.movielist; 13 = trial.fixation; 14 = list.movielist; 15= trial.fixation; 16 = list.movielist] </block>
You can do this and it'll do what you want,but you don't even need any <list>. You can simply state your block's /trials as:
<block experiment>
/ trials = [
1,3,5,7,9,11,13,15 = trial.fixation;
2,4,6,8,10,12,14,16 = noreplace(trial.movie1, trial.movie2, trial.movie3, trial.movie4, trial.movie5, trial.movie6, trial.movie7, trial.movie8);
]
</block>
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By ttyelnv - 9/3/2023
Thank you so much Dave!
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