I am conducting an experiment in which visual stimuli (colored squares) are randomly presented to participants. I built these stimuli using Paint Brush for Windows and the colors are red, yellow, and blue. When I ask SuperLab to present these stimuli in the experiment, there is a sort of fade in effect which I cannot change (i.e., the color intensity of these stimuli become increasingly higher throughout its presentation). I wonder if that has happened with anyone else here and if there is a way of avoiding this. I need SuperLab to present these stimuli in a way that they look static and not as if they were lighting.
I would really appreciate if anyone could help with this.