I have an experiment with different backgrounds in each block. I need the background to be visible for the entire duration of the block. At various times, a small target stimulus appears on the screen for 1 sec. I’m having 2 problems:
- I cannot change the location of the target stimulus. I try to select variable, but as soon as I exit the tab, it defaults back to fixed;
- when the target stimulus is removed, it leaves behind a white box. I’m assuming this has something to do with the format of the file for the target stimulus. I have tried everything I know to remove anything in the background of stimulus file, but I still get the white box.
Can anyone help?
Thanks so much.