[DMDX] counters Dear prof. Forster, For the training phase of my exp I have 4 prototypes that people have to recognize; ideally I need to count how many errors they do for each prototype and if in at least 1 prototype they do not do 80% correct they should start again. Unfortunately I was not able to do that, so I solved my probl by increasing the perc of correct that I want overall (90%) and use a simpler ?biert 10? function. Could you give me some suggestions on how set the four different counters as cue for the branching procedure, - I tried to set an error counter for just one prototype as trial but didn?t work -? I include my code for branching that seems to work,  Thank you very much, sorry for the vagueness of my question. annalisa branching:                       $ 0 "This is object A, you have 2 sec to observe it, press the spacebar to begin" ; 77 "+"/ /     "prototA.avi.avi" / ; 0 "This is object B, you have 2 sec to observe it, press the spacebar to begin" ; 78 "+"/ /     "prototB.avi.avi" / ; 0 "This is object C, you have 2 sec to observe it, press the spacebar to begin" ; 79 "+"/ /     "prototC.avi.avi" / ; 0 "This is object D, you have 2 sec to observe it, press the spacebar to begin" ; 80 "+"/ /     "prototD.avi.avi" / ; 0 "Press the correspondent key to identify the object" ; 0 "If you make more than 90% error you will have to start again" ;  10000  / ; $ +1        "+"/ / *     "prototA.avi.avi"/ /; +2        "+"/ / *     "prototA.avi.avi"/ /; $ 999  / ;  0 "The End"; $ Annalisa Setti, Post Doc. Psychology Department of Psychology  University of Bologna (Italy)