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Hello! I need help and idk about programming but I need this for our research. My dilemma is that I need it to be only 10 matches and 15 no matches but the program is programmed to give random matches and no matches. Got it from https://www.psytoolkit.org/experiment-library/touch_nback2.html . Thank u so much for helping this poor hooman.
Code:
options
bitmapdir stimuli
sounddir stimuli
set &maxrt 760 # stimulus presentation
set &iti 2000 # intertrial interval
set &choosechance 3 # 1 in 4 are matching
mouse on
sounds
sound_good good.mp3
sound_bad wrong.mp3
fonts
arial 18
bitmaps
letterA ## 15 letters
letterB
letterC
letterD
letterE
letterH
letterI
letterK
letterL
letterM
letterO
letterP
letterR
letterS
letterT
overlay
instruction1
instruction2
instruction3
## a part is a reusable piece of code. In this case, it gives for the
## 3 blocks the feedback
part myfeedback
feedback
text align left
set &Total1 count ; select c8 == 1 && c1 == BLOCKNUMBER ## number of trials where there was a 2back item
set &Total2 count ; select c8 > 1 && c1 == BLOCKNUMBER ## number of trials where there was NOT a 3back item
set &Matches count ; select c4 == 1 && c1 == BLOCKNUMBER ## number of matches
set &Misses count ; select c5 == 1 && c1 == BLOCKNUMBER ## number of misses
set &FalseAlarms count ; select c6 == 1 && c1 == BLOCKNUMBER ## number of false alarms
set &MatchesPerc expression &Matches / &Total1 * 100.0
set &MissesPerc expression &Misses / &Total1 * 100.0
set &FalseAlarmsPerc expression &FalseAlarms / &Total2 * 100.0
text -250 -200 "There were 25 trials in total in this block"
text -250 -150 &Total1 ; prefix "Total trials that had a match:"
text -250 -100 &Total2 ; prefix "Total trials that had no match:"
text -250 -50 &Matches ; prefix "Number of correctly matched items:"
text -250 -0 &Misses ; prefix "Number of missed items:"
text -250 50 &FalseAlarms ; prefix "Number of false alarms:"
text -250 100 &MatchesPerc ; prefix "Percentage correct matches:" ; postfix " %"
text -250 150 &MissesPerc ; prefix "Percentage missed items:" ; postfix " %"
text -250 200 &FalseAlarmsPerc ; prefix "Percentage false alarms:" ; postfix " %"
text -250 250 "Click mouse to continue and show data"
wait_for_key mouse
end
task nback_learning
set &trialcount increase
set $currentletter random 1 15 ## choose randomw letter, might be overridden
############################################################################
## is this condition a yes condition?
set $memory random 1 &choosechance ## 1 in &choosechance trials will be matching trial
## if a 2back trial (there must have been at least 2 trials before for this to be possible)
if $memory == 1 && &trialcount > 2
set $currentletter &nback2
set $requiredresponse 1 ## this is a MATCH, so response is required
fi
## if a NON 2back trial
if $memory != 1 || &trialcount <= 2 ## chose a letter but not that of 2 trials ago
set $currentletter random 1 15
while $currentletter == &nback2 ## choose anything but NOT that of 2 back
set $currentletter random 1 15
while-end
set $requiredresponse 2 ## this is a NON-match, so people need to withhold
fi
############################################################################
## this part is the only part that is different between learning and non-learning
draw off
show bitmap $currentletter ## stimulus 1
## now show previous trials
if &trialcount > 1
show bitmap &nback1 -100 0 # show 1-back left of stimulus
show bitmap overlay -100 0 # greyed out
fi
if &trialcount > 2
show bitmap &nback2 -200 0 # show 2-back left of stimulus
show bitmap overlay -200 0 # greyed out
fi
draw on
######################################################################
readmouse l 1 &maxrt ## click the first bitmap in this task
############################################################################
## the different possible response outcomes
##
if $requiredresponse == 1 and STATUS != TIMEOUT
set $score 1 ## means good
set $match 1
sound sound_good
fi
if $requiredresponse == 1 and STATUS == TIMEOUT
set $score 0 ## means wrong -- miss
set $miss 1
sound sound_bad
fi
if $requiredresponse == 2 and STATUS == TIMEOUT
set $score 1 ## means good
fi
if $requiredresponse == 2 and STATUS != TIMEOUT
set $score 0 ## means wrong
set $false_alarm 1
sound sound_bad
fi
#
######################################################################
#
set $extrawait expression &maxrt - RT ## how much time is left between max RT and now?
delay $extrawait ## wait until letter has been on screen total of 2000 ms
clear screen
delay 2000 ## wait 2000 ms
#
### now save the letter for next trial
#
set &nback2 &nback1
set &nback1 $currentletter
### save the data
save BLOCKNUMBER &trialcount $score $match $miss $false_alarm RT $memory $currentletter &nback1 &nback2
task nback_normal
set &trialcount increase
set $currentletter random 1 15 ## choose randomw letter, might be overridden
############################################################################
## is this condition a yes condition?
set $memory random 1 &choosechance ## 1 in &choosechance trials will be matching trial
## if a 2back trial (there must have been at least 2 trials before for this to be possible)
if $memory == 1 && &trialcount > 2
set $currentletter &nback2
set $requiredresponse 1 ## this is a MATCH, so response is required
fi
## if a NON 2back trial
if $memory != 1 || &trialcount <= 2 ## chose a letter but not that of 2 trials ago
set $currentletter random 1 15
while $currentletter == &nback2 ## choose anything but NOT that of 2 back
set $currentletter random 1 15
while-end
set $requiredresponse 2 ## this is a NON-match, so people need to withhold
fi
############################################################################
## this part is the only part that is different between learning and non-learning
draw off
show bitmap $currentletter ## stimulus 1
draw on
######################################################################
readmouse l 1 &maxrt ## click the first bitmap in this task
############################################################################
## the different possible response outcomes
##
if $requiredresponse == 1 and STATUS != TIMEOUT
set $score 1 ## means good
set $match 1
sound sound_good
fi
if $requiredresponse == 1 and STATUS == TIMEOUT
set $score 0 ## means wrong -- miss
set $miss 1
sound sound_bad
fi
if $requiredresponse == 2 and STATUS == TIMEOUT
set $score 1 ## means good
fi
if $requiredresponse == 2 and STATUS != TIMEOUT
set $score 0 ## means wrong
set $false_alarm 1
sound sound_bad
fi
#
######################################################################
#
set $extrawait expression &maxrt - RT ## how much time is left between max RT and now?
delay $extrawait ## wait until letter has been on screen total of 2000 ms
clear screen
delay 2000 ## wait 2000 ms
#
### now save the letter for next trial
#
set &nback2 &nback1
set &nback1 $currentletter
### save the data
save BLOCKNUMBER &trialcount $score $match $miss $false_alarm RT $memory $currentletter &nback1 &nback2
block training
set &trialcount 0 # make sure you use this again if you have another block
message instruction1 mouse
message instruction2 mouse
tasklist
nback_learning 25
end
part myfeedback
block normal1
set &trialcount 0 # make sure you use this again if you have another block
message instruction3 mouse
tasklist
nback_normal 25
end
part myfeedback
block normal2
set &trialcount 0 # make sure you use this again if you have another block
message instruction3 mouse
tasklist
nback_normal 25
end
part myfeedback