I am trying out Superlab and I want to show a 2nd Stimuli for 13 ms while a main Stimuli is shown for 2000ms. In addition, I want to randomise when exactly the 2nd Stimuli overlaps Stimuli 1. After Stimuli 2 was shown for one frame, I want Stimuli 1 to return for its remaining duration. Is that possible with Superlab? How?
My second question refers to subliminal stimuli. I created an event / stimuli (picture) that is displayed for 1 out of 60 frames. I set the time limit under the input tab to 1 ms. Anyway, it is still possible to see the picture in most cases (80-90% of the time). Any ideas how to handle it? I used fraps to measure the fps and it seems that Superlab does not really “play” the experiment with 60 frames per second (60 Hz is set in display options). Any ideas how to fix that? I tried multiple computers, notebooks and displays / projectors.