Code that makes sure the stimuli do not appear too close to each other

[gamze]

Hey everyone,

I am using the builder to create a spatial n-back task in which the same stimulus will appear back to back number of times in different positions and a question will be asked. I am trying to make sure that the current stimulus does not appear too close to the previous one. Any idea how I should write a code for this? I am currently randomly getting x, and y coordinates with random.choice.

Thanks in advance.

[JensBoelte]

Hello gamze

here you see one way how to randomize two positions

Random Position of Stimuli (two different images)

Dear Forum, I’ve got a problem with coding a random Position for the Stimuli. I coded it the way it is recommended on the Psychopy help page but still I always get a ‘syntax error’. This is what I coded: if random()>0.5: targetpos = [-0.5, 0]#on the left else: targetpos = [0.5, 0]#on the right if targetpos = [-0.5, 0] targetpos2 = [0.5,0] else: targetpos2 = [-0.5,0] I put it in the ‘Begin routine’ section just as recommended by Psychopy. And that is the output I get: i…

Alternatively, you could create a lis tof x- and y-positions at the beginning of the experiment, randomize those and pick from the list.

Best wishes Jens

[gamze]

Thank you for your reply and for your time Jens. I was more looking for examples for creating stimuli that do not appear too close to each other instead of randomly picking the positions from a list. However, I created a code for that and it worked. Thanks again