Image Stimulus Randomisation

Builder
1

Hey!

I am trying to create a pretty basic study involving showing a participant an image and then getting them to rate how dangerous they perceived it to be. This is pretty straight forwards and I have this set up and working well. However I am having an issue when I try to randomise the set of images I am using.
I have them set up in separate trial blocks ie,
(Trial with image one + rating) then (trial with image 2 + rating) and so on.

However I want to be able to present the images in a random order. The only way I am aware of doing this is through connecting my images into a spreadsheet and entering that into a loop.
My question is, how on earth do I connect images to a spreadsheet document, in order for PsychoPy to know where they are and how to access the images through said spreadsheet?

Any guidance would be massively appreciated!
Shona

2

Hi Shona,

You don’t “connect images to your spreadsheet”. You enter the location of the image files in the spreadsheet as simple text. In the same way, we don’t colour a cell in the spreadsheet, but use a text representation of a colour, like 'red' or ‘#FF0000’, that PsychoPy can read and use.

e.g. if you have an ‘images’ subdirectory next to your Builder file, then you would have a column that looks something like this in your conditions file:

image_name
images/cat.jpg
images/dog.jpg
images/pig.jpg

etc

Then in your image stimulus, simply put this in the “Image” field:

$image_name