Need help with fast presentation of stimuli

cmnelson4

Hi there,

I am relatively new to OpenSesame and need some help. I am trying to present a set of 60 images really fast so that it looks like a moving picture. I was wondering if there was an easy way OpenSesame can pull up each image in succession so I don't have to create a sketchpad item for each image? Any help is appreciated!

sebastiaan

Hi,

You could create a list of Canvas objects in an inline_script item (in the Prepare phase probably). Here's an example of a series of Canvas objects with different strings of text, but you can do it analogously for different images, using canvas.image().

• https://osdoc.cogsci.nl/3.2/manual/python/canvas/

clist = []
for i in range(60):
    c = Canvas()
    c.text('Frame {}'.format(i))
    clist.append(c)

And then you would later show all these Canvas objects (in the Run phase), possibly with a delay in between:

# Show them one at a time
for c in clist:
    c.show()
    clock.sleep (10)

Alternatively, you could create a movie from your images, and use the media_player_mpy item to play it. That might be easier.

Cheers!
Sebastiaan

cmnelson4

Thank you!