[solved] loop

zeel

Hello there,
I am a PG student and have to computerize experiment on open sesame. I have been trying to figure out something but cannot get it right.
In the experiment, I have 5 images to be presented one time, 5 images twice and 5 images to be presented 5 times (randomly). i can have different loop for each but how can i make these loop interactive? as i need all the 15(total) images to be presented randomly and not in their respective set.
can u help me with that please?
THANK YOU!

sebastiaan

Hi,

I'm afraid your question is not entirely clear. As you say, you can have a different loop for each of the three sets. In what sense doesn't this work as desired? And what do you mean by 'making a loop interactive'?

Cheers!
Sebastiaan

zeel

I have total 15 images to be presented. But they are to be exposed for different number of times. That is, 5 of the 15 images to be presented once, 5 to be presented twice and remaining 5 images for 5 times. I don't want them to be appearing as 'one time exposure' first then 'two time exposure', but in total 15 images presented randomly thus manipulating the no. of exposures for the image stimuli. How can i make this work?

sebastiaan

Hi,

It sounds like you want to present some images frequently than others in the same loop. Is that correct? You can do this simply by having some images appear two or five times in the loop table. So your loop table will contain duplicates.

There is even a shortcut to do this quickly. You add a column called 'weight' and fill this column with 1, 2, or 5, as appropriate. Next you click on the 'Apply weights' button and select the 'weight' column. This will duplicate all rows where the weight is 2, and 'five-plicate' all the rows where the weight is 5.

Does this answer your question?

Cheers!
Sebastiaan

zeel

yeah it does..Thanks a ton @};-