Presenting stimuli equally

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Presenting stimuli equally

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helenr	helenr posted 10 Years Ago Topic Details Share Topic
Group: Awaiting Activation Posts: 11, Visits: 54	Hi, I was wondering whether there is a way of ensuring that pairs of stimuli are presented an equal number of times in each trial type. I have 120 trials in which I am going to present pairs of pictoral stimuli. There are 4 types of trials (or conditions), and 15 pairs of pictures, so I need to present each pair of pictures twice in each condition. Ideally, in each condition I would like each picture to be presented once on the left and once on the right (so I guess then I have 8 types of trials altogether??). Is there a shorter way to do this rather than write out each trial individually? Hope this makes sense! Thanks in advance for your help. I've pasted the relevant parts of my script below (n.b. picture '1b' always has to be presented with picture '1a' etc). <item chocset> / 1 = "1b.jpg" / 2 = "2b.jpg" / 3 = "3b.jpg" / 4 = "4b.jpg" / 5 = "5b.jpg" / 6 = "6b.jpg" / 7 = "7b.jpg" / 8 = "8b.jpg" / 9 = "9b.jpg" / 10 = "10b.jpg" / 11 = "11b.jpg" / 12 = "12b.jpg" / 13 = "13b.jpg" / 14 = "14b.jpg" / 15 = "15b.jpg" </item> <item controlset2> / 1 = "1a.jpg" / 2 = "2a.jpg" / 3 = "3a.jpg" / 4 = "4a.jpg" / 5 = "5a.jpg" / 6 = "6a.jpg" / 7 = "7a.jpg" / 8 = "8a.jpg" / 9 = "9a.jpg" / 10 = "10a.jpg" / 10 = "11a.jpg" / 10 = "12a.jpg" / 10 = "13a.jpg" / 10 = "14a.jpg" / 10 = "15a.jpg" </item> <picture lefttarget> /items = ("1b.jpg","2b.jpg","3b.jpg","4b.jpg","5b.jpg","6b.jpg","7b.jpg","8b.jpg","9b.jpg","10b.jpg","11b.jpg","12b.jpg","13b.jpg","14b.jpg","15b.jpg") /position = (20,50) /size = (65%, 40%) /select = picture.rightcontrol.currentindex </picture> <picture righttarget> /items=("1b.jpg","2b.jpg","3b.jpg","4b.jpg","5b.jpg","6b.jpg","7b.jpg","8b.jpg","9b.jpg","10b.jpg","11b.jpg","12b.jpg","13b.jpg","14b.jpg","15b.jpg") /position = (80,50) /size = (65%, 40%) /select = picture.leftcontrol.currentindex </picture> <picture leftcontrol> /items = ("1a.jpg","2a.jpg","3a.jpg","4a.jpg","5a.jpg","6a.jpg","7a.jpg","8a.jpg","9a.jpg","10a.jpg","11a.jpg","12a.jpg"."13a.jpg","14a.jpg","15a.jpg") /position = (20,50) /size = (65%, 40%) /select = noreplace </picture> <picture rightcontrol> /items=("1a.jpg","2a.jpg","3a.jpg","4a.jpg","5a.jpg","6a.jpg","7a.jpg","8a.jpg","9a.jpg","10a.jpg","11a.jpg","12a.jpg"."13a.jpg","14a.jpg"."15a.jpg") /size = (65%, 40%) /position = (80,50) /select = noreplace </picture> <trial right100_win> /stimulustimes = [0 = FixationCRS ; 1000 = blank,fixation100; 2000 = blank; 2001 = leftcontrol, righttarget; 4001 = blank, ResponseC] /correctresponse = (" ") / validresponse = (" ") / response = correct / branch = [if(trial.right100_win.correct) trial.winchoc] </trial> <trial left100_win> /stimulustimes = [0 = FixationCRS; 1000= blank, fixation100; 2000 = blank; 2001 = rightcontrol, lefttarget; 4001 = blank,ResponseC] /correctresponse = (" ") / validresponse = (" ") / response = correct / branch = [if(trial.left100_win.correct) trial.winchoc] </trial> <trial right50_win> /stimulustimes = [0 = FixationCRS; 1000=blank, fixation50; 2000 = blank; 2001 = leftcontrol, righttarget; 4001 = blank,ResponseC] /correctresponse = (" ") / validresponse = (" ") / response = correct / branch = [if(trial.right50_win.correct) trial.winchoc] </trial> <trial left50_win> /stimulustimes = [0 = FixationCRS; 1000=blank, fixation50; 2000 = blank; 2001 = rightcontrol, lefttarget; 4001 = blank,ResponseC] /correctresponse = (" ") / validresponse = (" ") / response = correct / branch = [if(trial.left50_win.correct) trial.winchoc] </trial> <trial right50_lose> /stimulustimes = [0 = FixationCRS; 1000=blank, fixation50; 2000 = blank; 2001 = leftcontrol, righttarget; 4001 = blank,ResponseC] /correctresponse = (" ") / validresponse = (" ") / response = correct / branch = [if(trial.right50_lose.correct) trial.winnothing] </trial> <trial left50_lose> /stimulustimes = [0 = FixationCRS; 1000=blank, fixation50; 2000= blank; 2001 = rightcontrol, lefttarget; 4001 = blank,ResponseC] /correctresponse = (" ") / validresponse = (" ") / response = correct / branch = [if(trial.left50_lose.correct) trial.winnothing] </trial> <trial right0_lose> /stimulustimes = [0 = FixationCRS; 1000=blank, fixation0; 2000= blank; 2001 = leftcontrol, righttarget; 4001 = blank,ResponseC] /correctresponse = (" ") / validresponse = (" ") / response = correct / branch = [if(trial.right0_lose.correct) trial.winnothing] </trial> <trial left0_lose> /stimulustimes = [0 = FixationCRS; 1000= blank, fixation0; 2000= blank; 2001 = rightcontrol, lefttarget; 4001 = blank, ResponseC] /correctresponse = (" ") / validresponse = (" ") / response = correct / branch = [if(trial.left0_lose.correct) trial.winnothing] </trial> *** 120 trials ** 40 x 100% win trials: 20 x target right, 20 x target left; 20 x 50% win trials: 10 x target right, 10 x target left; 20 x 50% lose trials: 10 x target right, 10 x target left; 4 0 x 0% lose trials: 20 x target right, 20 x target left. ********************************************************* <block main_exp> /trials = [1-60, 62-121 = noreplacenorepeat § (right100_win,right100_win,right100_win,right100_win,right100_win,right100_win,right100_win,right100_win,right100_win,right100_win,right100_win,right100_win,right100_win,right100_win,right100_win,right100_win,right100_win,right100_win,right100_win,right100_win, left100_win, left100_win, left100_win, left100_win, left100_win, left100_win, left100_win, left100_win, left100_win, left100_win, left100_win, left100_win, left100_win, left100_win, left100_win, left100_win, left100_win, left100_win, left100_win, left100_win, right50_win,right50_win,right50_win,right50_win,right50_win, right50_win,right50_win,right50_win,right50_win,right50_win, right50_lose, right50_lose, right50_lose, right50_lose, right50_lose,right50_lose, right50_lose, right50_lose, right50_lose, right50_lose, left50_win,left50_win,left50_win,left50_win,left50_win,left50_win,left50_win,left50_win,left50_win,left50_win, left50_lose,left50_lose,left50_lose,left50_lose,left50_lose,left50_lose,left50_lose,left50_lose,left50_lose,left50_lose, right0_lose,right0_lose,right0_lose,right0_lose,right0_lose,right0_lose,right0_lose,right0_lose,right0_lose,right0_lose,right0_lose,right0_lose,right0_lose,right0_lose,right0_lose,right0_lose,right0_lose,right0_lose,right0_lose, right0_lose, left0_lose,left0_lose,left0_lose,left0_lose,left0_lose,left0_lose,left0_lose,left0_lose,left0_lose,left0_lose,left0_lose,left0_lose,left0_lose,left0_lose,left0_lose,left0_lose,left0_lose,left0_lose,left0_lose,left0_lose); 61 = rest1] </block> <expt> /blocks = [1=practice; 2=main_exp] /postinstructions = (end) </expt>
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Dave	Dave posted 10 Years Ago ANSWER Post Details Share Post
Group: Administrators Posts: 13K, Visits: 104K	You need to encode your stimulus-pair-position combinations somehow (e.g. using <list> elements) and then sample from those combinations: <block myblock> / trials = [1-8=mytrial] </block> <trial mytrial> / stimulusframes = [1=a,b] / validresponse = (57) </trial> <text a> / items = aitems / select = list.pairlist.nextvalue / hposition = list.apos.nextvalue </text> <text b> / items = bitems / select = list.pairlist.nextvalue / hposition = list.bpos.nextvalue </text> <item aitems> / 1 = "A1" / 1 = "A2" / 1 = "A3" / 1 = "A4" </item> <item bitems> / 1 = "B1" / 1 = "B2" / 1 = "B3" / 1 = "B4" </item> <list pairlist> / items = (1,1,2,2,3,3,4,4) </list> <list apos> / items = (40%,60%,40%,60%,40%,60%,40%,60%) / selectionmode = list.pairlist.currentindex </list> <list bpos> / items = (60%,40%,60%,40%,60%,40%,60%,40%) / selectionmode = list.pairlist.currentindex </list>
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helenr	helenr posted 10 Years Ago ANSWER Post Details Share Post
Group: Awaiting Activation Posts: 11, Visits: 54	Thanks for your help! It's now presenting each picture exactly 8 times which is good, however it doesn't seem to be presenting each picture equally in each condition (i.e. once in 100% left trials, once in 100% right trials, once in 50% left lose trials, once in 50% right lose trials, once in 50% left win trials, once in 50% right win trials, once in 0% left trials, and once in 0% right trials). Please can you let me know where I'm going wrong (I'm sure I've missed something really obvious!) Thanks!! <item chocset> / 1 = "1b.jpg" / 2 = "2b.jpg" / 3 = "3b.jpg" / 4 = "4b.jpg" / 5 = "5b.jpg" / 6 = "6b.jpg" / 7 = "7b.jpg" / 8 = "8b.jpg" / 9 = "9b.jpg" / 10 = "10b.jpg" / 11 = "11b.jpg" / 12 = "12b.jpg" / 13 = "13b.jpg" / 14 = "14b.jpg" / 15 = "15b.jpg" </item> <item controlset2> / 1 = "1a.jpg" / 2 = "2a.jpg" / 3 = "3a.jpg" / 4 = "4a.jpg" / 5 = "5a.jpg" / 6 = "6a.jpg" / 7 = "7a.jpg" / 8 = "8a.jpg" / 9 = "9a.jpg" / 10 = "10a.jpg" / 10 = "11a.jpg" / 10 = "12a.jpg" / 10 = "13a.jpg" / 10 = "14a.jpg" / 10 = "15a.jpg" </item> <picture lefttarget> /items = ("1b.jpg","2b.jpg","3b.jpg","4b.jpg","5b.jpg","6b.jpg","7b.jpg","8b.jpg","9b.jpg","10b.jpg","11b.jpg","12b.jpg","13b.jpg","14b.jpg","15b.jpg") /position = (20,50) /size = (65%, 40%) /select = picture.rightcontrol.currentindex </picture> <picture righttarget> /items=("1b.jpg","2b.jpg","3b.jpg","4b.jpg","5b.jpg","6b.jpg","7b.jpg","8b.jpg","9b.jpg","10b.jpg","11b.jpg","12b.jpg","13b.jpg","14b.jpg","15b.jpg") /position = (80,50) /size = (65%, 40%) /select = picture.leftcontrol.currentindex </picture> <picture leftcontrol> /items = ("1a.jpg","2a.jpg","3a.jpg","4a.jpg","5a.jpg","6a.jpg","7a.jpg","8a.jpg","9a.jpg","10a.jpg","11a.jpg","12a.jpg"."13a.jpg","14a.jpg","15a.jpg") /position = (20,50) /size = (65%, 40%) /select = noreplace </picture> <picture rightcontrol> /items=("1a.jpg","2a.jpg","3a.jpg","4a.jpg","5a.jpg","6a.jpg","7a.jpg","8a.jpg","9a.jpg","10a.jpg","11a.jpg","12a.jpg"."13a.jpg","14a.jpg"."15a.jpg") /size = (65%, 40%) /position = (80,50) /select = noreplace </picture> <list pairlist> / items = (1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,11,11,12,12,13,13,14,14,15,15) </list> <list choc_pos> / items = (40%,60%,40%,60%,40%,60%,40%,60%) / selectionmode = list.pairlist.currentindex </list> <list cont_pos> / items = (60%,40%,60%,40%,60%,40%,60%,40%) / selectionmode = list.pairlist.currentindex </list> <trial right100_win> /stimulustimes = [0 = FixationCRS ; 1000 = blank,fixation100; 2000 = blank; 2001 = leftcontrol, righttarget; 4001 = blank, ResponseC] /correctresponse = (" ") / validresponse = (" ") / response = correct / branch = [if(trial.right100_win.correct) trial.winchoc] </trial> <trial left100_win> /stimulustimes = [0 = FixationCRS; 1000= blank, fixation100; 2000 = blank; 2001 = rightcontrol, lefttarget; 4001 = blank,ResponseC] /correctresponse = (" ") / validresponse = (" ") / response = correct / branch = [if(trial.left100_win.correct) trial.winchoc] </trial> <trial right50_win> /stimulustimes = [0 = FixationCRS; 1000=blank, fixation50; 2000 = blank; 2001 = leftcontrol, righttarget; 4001 = blank,ResponseC] /correctresponse = (" ") / validresponse = (" ") / response = correct / branch = [if(trial.right50_win.correct) trial.winchoc] </trial> <trial left50_win> /stimulustimes = [0 = FixationCRS; 1000=blank, fixation50; 2000 = blank; 2001 = rightcontrol, lefttarget; 4001 = blank,ResponseC] /correctresponse = (" ") / validresponse = (" ") / response = correct / branch = [if(trial.left50_win.correct) trial.winchoc] </trial> <trial right50_lose> /stimulustimes = [0 = FixationCRS; 1000=blank, fixation50; 2000 = blank; 2001 = leftcontrol, righttarget; 4001 = blank,ResponseC] /correctresponse = (" ") / validresponse = (" ") / response = correct / branch = [if(trial.right50_lose.correct) trial.winnothing] </trial> <trial left50_lose> /stimulustimes = [0 = FixationCRS; 1000=blank, fixation50; 2000= blank; 2001 = rightcontrol, lefttarget; 4001 = blank,ResponseC] /correctresponse = (" ") / validresponse = (" ") / response = correct / branch = [if(trial.left50_lose.correct) trial.winnothing] </trial> <trial right0_lose> /stimulustimes = [0 = FixationCRS; 1000=blank, fixation0; 2000= blank; 2001 = leftcontrol, righttarget; 4001 = blank,ResponseC] /correctresponse = (" ") / validresponse = (" ") / response = correct / branch = [if(trial.right0_lose.correct) trial.winnothing] </trial> <trial left0_lose> /stimulustimes = [0 = FixationCRS; 1000= blank, fixation0; 2000= blank; 2001 = rightcontrol, lefttarget; 4001 = blank, ResponseC] /correctresponse = (" ") / validresponse = (" ") / response = correct / branch = [if(trial.left0_lose.correct) trial.winnothing] </trial> <text choc_items> /items=chocset /select = list.pairlist.nextvalue /hposition = list.choc_pos.nextvalue </text> <text cont_items> /items=controlset2 /select = list.pairlist.nextvalue /hposition = list.cont_pos.nextvalue </text> *** 120 trials ** 40 x 100% win trials: 20 x target right, 20 x target left; 20 x 50% win trials: 10 x target right, 10 x target left; 20 x 50% lose trials: 10 x target right, 10 x target left; 4 0 x 0% lose trials: 20 x target right, 20 x target left. ******************************************************* <block main_exp> /trials = [1-60, 62-121 = noreplacenorepeat § (right100_win,right100_win,right100_win,right100_win,right100_win,right100_win,right100_win,right100_win,right100_win,right100_win,right100_win,right100_win,right100_win,right100_win,right100_win,right100_win,right100_win,right100_win,right100_win,right100_win, left100_win, left100_win, left100_win, left100_win, left100_win, left100_win, left100_win, left100_win, left100_win, left100_win, left100_win, left100_win, left100_win, left100_win, left100_win, left100_win, left100_win, left100_win, left100_win, left100_win, right50_win,right50_win,right50_win,right50_win,right50_win, right50_win,right50_win,right50_win,right50_win,right50_win, right50_lose, right50_lose, right50_lose, right50_lose, right50_lose,right50_lose, right50_lose, right50_lose, right50_lose, right50_lose, left50_win,left50_win,left50_win,left50_win,left50_win,left50_win,left50_win,left50_win,left50_win,left50_win, left50_lose,left50_lose,left50_lose,left50_lose,left50_lose,left50_lose,left50_lose,left50_lose,left50_lose,left50_lose, right0_lose,right0_lose,right0_lose,right0_lose,right0_lose,right0_lose,right0_lose,right0_lose,right0_lose,right0_lose,right0_lose,right0_lose,right0_lose,right0_lose,right0_lose,right0_lose,right0_lose,right0_lose,right0_lose, right0_lose, left0_lose,left0_lose,left0_lose,left0_lose,left0_lose,left0_lose,left0_lose,left0_lose,left0_lose,left0_lose,left0_lose,left0_lose,left0_lose,left0_lose,left0_lose,left0_lose,left0_lose,left0_lose,left0_lose,left0_lose); 61 = rest1] </block> <expt> /blocks = [1=practice; 2=main_exp] /postinstructions = (end) </expt> * 120 trials ** 40 x 100% win trials: 20 x target right, 20 x target left; 20 x 50% win trials: 10 x target right, 10 x target left; 20 x 50% lose trials: 10 x target right, 10 x target left; 4 0 x 0% lose trials: 20 x target right, 20 x target left. ********************************************************* <block main_exp> /trials = [1-60, 62-121 = noreplacenorepeat § (right100_win,right100_win,right100_win,right100_win,right100_win,right100_win,right100_win,right100_win,right100_win,right100_win,right100_win,right100_win,right100_win,right100_win,right100_win,right100_win,right100_win,right100_win,right100_win,right100_win, left100_win, left100_win, left100_win, left100_win, left100_win, left100_win, left100_win, left100_win, left100_win, left100_win, left100_win, left100_win, left100_win, left100_win, left100_win, left100_win, left100_win, left100_win, left100_win, left100_win, right50_win,right50_win,right50_win,right50_win,right50_win, right50_win,right50_win,right50_win,right50_win,right50_win, right50_lose, right50_lose, right50_lose, right50_lose, right50_lose,right50_lose, right50_lose, right50_lose, right50_lose, right50_lose, left50_win,left50_win,left50_win,left50_win,left50_win,left50_win,left50_win,left50_win,left50_win,left50_win, left50_lose,left50_lose,left50_lose,left50_lose,left50_lose,left50_lose,left50_lose,left50_lose,left50_lose,left50_lose, right0_lose,right0_lose,right0_lose,right0_lose,right0_lose,right0_lose,right0_lose,right0_lose,right0_lose,right0_lose,right0_lose,right0_lose,right0_lose,right0_lose,right0_lose,right0_lose,right0_lose,right0_lose,right0_lose, right0_lose, left0_lose,left0_lose,left0_lose,left0_lose,left0_lose,left0_lose,left0_lose,left0_lose,left0_lose,left0_lose,left0_lose,left0_lose,left0_lose,left0_lose,left0_lose,left0_lose,left0_lose,left0_lose,left0_lose,left0_lose); 61 = rest1] </block> <expt> /blocks = [1=practice; 2=main_exp] /postinstructions = (end) </expt> <trial right100_win> /stimulustimes = [0 = FixationCRS ; 1000 = blank,fixation100; 2000 = blank; 2001 = leftcontrol, righttarget; 4001 = blank, ResponseC] /correctresponse = (" ") / validresponse = (" ") / response = correct / branch = [if(trial.right100_win.correct) trial.winchoc] </trial> <trial left100_win> /stimulustimes = [0 = FixationCRS; 1000= blank, fixation100; 2000 = blank; 2001 = rightcontrol, lefttarget; 4001 = blank,ResponseC] /correctresponse = (" ") / validresponse = (" ") / response = correct / branch = [if(trial.left100_win.correct) trial.winchoc] </trial> <trial right50_win> /stimulustimes = [0 = FixationCRS; 1000=blank, fixation50; 2000 = blank; 2001 = leftcontrol, righttarget; 4001 = blank,ResponseC] /correctresponse = (" ") / validresponse = (" ") / response = correct / branch = [if(trial.right50_win.correct) trial.winchoc] </trial> <trial left50_win> /stimulustimes = [0 = FixationCRS; 1000=blank, fixation50; 2000 = blank; 2001 = rightcontrol, lefttarget; 4001 = blank,ResponseC] /correctresponse = (" ") / validresponse = (" ") / response = correct / branch = [if(trial.left50_win.correct) trial.winchoc] </trial> <trial right50_lose> /stimulustimes = [0 = FixationCRS; 1000=blank, fixation50; 2000 = blank; 2001 = leftcontrol, righttarget; 4001 = blank,ResponseC] /correctresponse = (" ") / validresponse = (" ") / response = correct / branch = [if(trial.right50_lose.correct) trial.winnothing] </trial> <trial left50_lose> /stimulustimes = [0 = FixationCRS; 1000=blank, fixation50; 2000= blank; 2001 = rightcontrol, lefttarget; 4001 = blank,ResponseC] /correctresponse = (" ") / validresponse = (" ") / response = correct / branch = [if(trial.left50_lose.correct) trial.winnothing] </trial> <trial right0_lose> /stimulustimes = [0 = FixationCRS; 1000=blank, fixation0; 2000= blank; 2001 = leftcontrol, righttarget; 4001 = blank,ResponseC] /correctresponse = (" ") / validresponse = (" ") / response = correct / branch = [if(trial.right0_lose.correct) trial.winnothing] </trial> <trial left0_lose> /stimulustimes = [0 = FixationCRS; 1000= blank, fixation0; 2000= blank; 2001 = rightcontrol, lefttarget; 4001 = blank, ResponseC] /correctresponse = (" ") / validresponse = (" ") / response = correct / branch = [if(trial.left0_lose.correct) trial.winnothing] </trial> <trial 100_win_practice> /stimulustimes = [0 = FixationCRS; 1000=blank, fixation100; 2000 = blank; 2001 = right_practice, left_practice; 4001 = blank, ResponseC] /correctresponse = (" ") / validresponse = (" ") / response = correct / branch = [if(trial.100_win_practice.correct) trial.winchoc] </trial> <trial 50_win_practice> /stimulustimes = [0 = FixationCRS; 1000=blank, fixation50; 2000 = blank; 2001 = right_practice, left_practice; 4001 = blank, ResponseC] /correctresponse = (" ") / validresponse = (" ") / response = correct / branch = [if(trial.50_win_practice.correct) trial.winchoc] </trial> <trial 50_lose_practice> /stimulustimes = [0 = FixationCRS; 1000=blank, fixation50; 2000 = blank; 2001 = right_practice, left_practice; 4001 = blank, ResponseC] /correctresponse = (" ") / validresponse = (" ") / response = correct / branch = [if(trial.50_lose_practice.correct) trial.winnothing] </trial> <trial 0_lose_practice> /stimulustimes = [0 = FixationCRS; 1000=blank, fixation0; 2000 = blank; 2001 = right_practice, left_practice; 4001 = blank, ResponseC] /correctresponse = (" ") / validresponse = (" ") / response = correct / branch = [if(trial.0_lose_practice.correct) trial.winnothing] </trial> <trial right100_win> /stimulustimes = [0 = FixationCRS ; 1000 = blank,fixation100; 2000 = blank; 2001 = leftcontrol, righttarget; 4001 = blank, ResponseC] /correctresponse = (" ") / validresponse = (" ") / response = correct / branch = [if(trial.right100_win.correct) trial.winchoc] </trial> <trial left100_win> /stimulustimes = [0 = FixationCRS; 1000= blank, fixation100; 2000 = blank; 2001 = rightcontrol, lefttarget; 4001 = blank,ResponseC] /correctresponse = (" ") / validresponse = (" ") / response = correct / branch = [if(trial.left100_win.correct) trial.winchoc] </trial> <trial right50_win> /stimulustimes = [0 = FixationCRS; 1000=blank, fixation50; 2000 = blank; 2001 = leftcontrol, righttarget; 4001 = blank,ResponseC] /correctresponse = (" ") / validresponse = (" ") / response = correct / branch = [if(trial.right50_win.correct) trial.winchoc] </trial> <trial left50_win> /stimulustimes = [0 = FixationCRS; 1000=blank, fixation50; 2000 = blank; 2001 = rightcontrol, lefttarget; 4001 = blank,ResponseC] /correctresponse = (" ") / validresponse = (" ") / response = correct / branch = [if(trial.left50_win.correct) trial.winchoc] </trial> <trial right50_lose> /stimulustimes = [0 = FixationCRS; 1000=blank, fixation50; 2000 = blank; 2001 = leftcontrol, righttarget; 4001 = blank,ResponseC] /correctresponse = (" ") / validresponse = (" ") / response = correct / branch = [if(trial.right50_lose.correct) trial.winnothing] </trial> <trial left50_lose> /stimulustimes = [0 = FixationCRS; 1000=blank, fixation50; 2000= blank; 2001 = rightcontrol, lefttarget; 4001 = blank,ResponseC] /correctresponse = (" ") / validresponse = (" ") / response = correct / branch = [if(trial.left50_lose.correct) trial.winnothing] </trial> <trial right0_lose> /stimulustimes = [0 = FixationCRS; 1000=blank, fixation0; 2000= blank; 2001 = leftcontrol, righttarget; 4001 = blank,ResponseC] /correctresponse = (" ") / validresponse = (" ") / response = correct / branch = [if(trial.right0_lose.correct) trial.winnothing] </trial> <trial left0_lose> /stimulustimes = [0 = FixationCRS; 1000= blank, fixation0; 2000= blank; 2001 = rightcontrol, lefttarget; 4001 = blank, ResponseC] /correctresponse = (" ") / validresponse = (" ") / response = correct / branch = [if(trial.left0_lose.correct) trial.winnothing] </trial> <trial 100_win_practice> /stimulustimes = [0 = FixationCRS; 1000=blank, fixation100; 2000 = blank; 2001 = right_practice, left_practice; 4001 = blank, ResponseC] /correctresponse = (" ") / validresponse = (" ") / response = correct / branch = [if(trial.100_win_practice.correct) trial.winchoc] </trial> <trial 50_win_practice> /stimulustimes = [0 = FixationCRS; 1000=blank, fixation50; 2000 = blank; 2001 = right_practice, left_practice; 4001 = blank, ResponseC] /correctresponse = (" ") / validresponse = (" ") / response = correct / branch = [if(trial.50_win_practice.correct) trial.winchoc] </trial> <trial 50_lose_practice> /stimulustimes = [0 = FixationCRS; 1000=blank, fixation50; 2000 = blank; 2001 = right_practice, left_practice; 4001 = blank, ResponseC] /correctresponse = (" ") / validresponse = (" ") / response = correct / branch = [if(trial.50_lose_practice.correct) trial.winnothing] </trial> <trial 0_lose_practice> /stimulustimes = [0 = FixationCRS; 1000=blank, fixation0; 2000 = blank; 2001 = right_practice, left_practice; 4001 = blank, ResponseC] /correctresponse = (" ") / validresponse = (" ") / response = correct / branch = [if(trial.0_lose_practice.correct) trial.winnothing] </trial>
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Dave	Dave posted 10 Years Ago ANSWER Post Details Share Post
Group: Administrators Posts: 13K, Visits: 104K	> It's now presenting each picture exactly 8 times which is good, however it doesn't seem to be presenting each picture equally in > each condition You need separate sets of <lists> -- one set for each condition -- which encode the combinations you want in a given condition. Sample from the appropriate set in the respective trials.
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