Change the stimuli's name within eprime

[Julia Gomez]

Dear all,

Does anyone knows how to change the name of file in a list to call up 
stimuli? The stimuli has to change according to the condition they are in.

I am doing an experiment that is presented in two phases. In the first 
phase, I am using 12 different neutral faces. Faces are located into 5 
different conditions (HG,LG,HL,LL,N,  with two faces in each condition 
(i.e. HG1, HG2, LG1, etc...) except in the N condition that has two 
pairs(N1, N2, N3,& N4).I have counterbalanced the stimuli in 12 
different conditions, (i.e. in condition 1 face M01 is assigned in HG 
and in condition 3 same face M01 is assigned to LL condition). This part 
of the experiment is done and it works fine.

My problem occurs in the second phase of the experiment. Here I am using 
the same12 stimuli with five different intensities of emotion (morphs 
from neutral to expressive) by two different emotions (happy and angry, 
so called M01Hap_01.bmp, M01Hap_02.bmp, M01Hap03.bmp, M01Hap04.bmp and 
M01Hap_05; M01Ang_01.bmp, etc.. ) (a total of 120 different pictures). 
The task consist in presenting two faces simultaneously to choose one 
over another. The presentation is NOT random and has an specific 
combination. I would like to create a some kind of list that calls the 
HG1 and N1, HG2 and N3 etc.. for example [HG1]Hap_01.bmp. I have already 
created an script where according to the counterbalancing condition, 
HG,LG,HL,LL,N are assigned with the name of the file:

Case 1
HG1="M04"
HG2="F07"
LG1="M05"
LG2="F08"
etc..

Case 2
HG1="M10"
HG2="F15"
etc...
Untill Case 12

My problem is that I dont know how to call a stimuli and changing its 
name according to the condition. I am not very familiar with programing. 
Any help would be gratefully appreciated.

Julia







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