WIndow 10, PsychoPy version 1.82.01
Hi everyone,
I’m trying to design an experiment in which participants are asked to choose the answer after seeing a statement like a multiple choice task. A stimulus is present until they press the key corresponding to the answer.
There are three options as possible answers for each question, and I want to shuffle the position of items in each trial. The three items correspond to the three columns in condition file (ansA, ansB, ansC)
For doing this, I specified the position and the button to be pressed by using Text and Code component. Here is the screenshot for your understanding:
In each Text component, I put the position as positions.pop () in the location field and the variable $ansA in the text field, all by set every repeat.
And for the Code component, I insert some codes like:
In Begin Experiment,
key_to_x = {‘z’:-0.6, ‘v’:0, ‘m’:0.6}
In Begin Routine,
positions = [[-0.6,0],[0,0],[0.6,0]]
shuffle(positions) # randomize the order on each trial
#Store the x coordinate of each stimulus:
thisExp.addData('text_trial_ansA_x', text_trial_ansA.pos[0])
thisExp.addData('text_trial_ansB_x', text_trial_ansB.pos[0])
thisExp.addData('text_trial_ansC_x', text_trial_ansC.pos[0])
# Indicate the x coordinate of the chosen stimulus:
thisExp.addData('chosen_x', key_to_x[Choice.keys[0])
The problem is that the builder doesn’t run; even any error message is not generated.
I’m not pretty sure, but is it because there is a crash between code components (one of them is used for a cumulative presentation of items across trials, but there is no string used in Begin Experiment field)? or maybe because of other problems that I haven’t thought of…?
Thank you all in advance for your help!