Present images with specific order

Builder
1

If this template helps then use it. If not then just delete and start from scratch.

OS (e.g. Win10): windows 11
PsychoPy version (e.g. 1.84.x): The latest
Standard Standalone? (y/n) If not then what?: Yes
What are you trying to achieve?: Hello to everyone, I have an experiment with image presentation.
During the first part I want the images to be presented in random order which I easilty achieved with just checked “random” in the trial loop. In the second part I would like the images to be presented in a specific
order so (Category1-Category2-Category3-Category4-Category5) and the program shoudl pick randomly for th pull of each category. It is not convenient to do it in builder just picking "sequestial2 since I watn the images for each cateogy to be ricked randomly within the sequence. So lets say Cateogry 1 is faces there are 24 exemplars within it. Any ideas how I do this with code? Thank you very mich!

2

Hi @Anastasia_Dimakou,

If I understand what you’re looking to achieve correctly, this Blocks and Counterbalancing page might solve your problem without the need for code at all!

Let me know if this helps,

Kim

3

Thank you Kimberley! I will try it out and let you know!

4

I figured out with this code
begin experiment :

Blockquote# create image lists:
Faces = [f’Face_{i}.png’ for i in range(21,44)]
Scenes = [f’Scene_{i}.png’ for i in range(21,44)]
Bodies = [f’Body_{i}.png’ for i in range(21,44)]
Tools = [f’tool_{i}.png’ for i in range(21,44)]
Scrambled = [f’scrambled_{i}.tif’ for i in range(21,44)]

Blockquote
shuffle(Faces)
shuffle(Scenes)
shuffle(Bodies)
shuffle(Tools)
shuffle(Scrambled)

anf then begin routine

Blockquote
if Sequence == ‘F’:
image_file = Faces.pop()
if Sequence == ‘S’:
image_file = Scenes.pop()
if Sequence == ‘B’:
image_file = Bodies.pop()
if Sequence == ‘Sr’:
image_file = Scrambled.pop()
if Sequence == ‘T’:
image_file = Tools.pop()

thisExp.addData(‘image_file’, image_file)

And a file in the loop with the order I want. I think it works do not now if it super elegant

1 Like