BEGINNER QUESTIONS: Creating Grated Stim with random orientations

Coding
1

Hi yall, I’m BRAND new to psychopy and trying to build the following experiment

  • Present gabor patches (random number and random orientations) to participants
  • Ask for estimate of number of items they saw
  • Get the specs about the number and orientations of the stim to analyze later

Here are my problems so far:

  1. I’ve been using this tutorial.) to learn, but I’m having trouble creating a for loop that’s not based on a staircase function.

  2. I’m not sure how to make multiple stim appear at the same time. I know you can use ElementArrayStim for this, but I’m having trouble understanding how to incorporate this with the grated stim.

Thank you so much for your patience and advice!
Nora

2

You don’t necessarily need an Element Array for this! In the Routine Canvas, the bars represent when the stimuli are on screen - if two bars overlap, then the two stimuli are on screen at the same time. When you say creating a for loop, do you mean using Builder or using code? A for loop in Python code just looks like this:

for value in listOfValues:
    doWhateverTo(value)

but if you want to add a loop in Builder, you can do so using the Insert Loop button in the bottom left