Yoking Error

Hello,

I'm setting up a study on which the second image presented in a trial is yoked to the first image presented in that trial. I have 54 trials and 18 text files from which the images are selected.

A second image is presented in 2/3 of these trials. I use the same group of files for the selection of the second image. From the 10th trial on, the second image is not properly yoked to the first image. It is coming from a different positition in the text file.

How can this be fixed?

Thank you

4lm24, were you able to find a solution to this problem?

Can you identify if there's a pattern to the position that the text file is being accessed at, or is it completely random?

I have not found a solution to the problem. I know that all of the image files are labeled correctly and that the text files are ordered correctly. As far as I can tell there is no pattern in the position in the text file being accessed.