Millisecond Forums

Experiment will be live/running in the coming days I am happy to say, thank you again for your help.

Just my last inquiry - all my scripts are defaulted to white background, black text (keep the whole exp consistent, aesthetically). All of them work fine and look great!

However, one task used is N back. I have downloaded the script from Library (letter stimuli, English) - the variant right at the bottom. I systematically but carefully changed background (or screen color, txtbackground etc) to white, and text to black, at the relevant parts of the script.

However, when the task is run, the N-back letter stimuli arrive, at times but not always!, simultaneously with  black borders or random black shapes around them! Other times this does not happen

I was wondering if there was something I was missing, or if there is no straightforward way to make such a global inversion of color without it interfering with the task in this way? I did eye-ball carefully each segment of code to see why this clash may be occurring, but I could not work it out.

I attach the script here (which is the script from library but I have adapted according to the above). Note that I have changed the instruction images for sharper resolution.

If there is a way to simply invert the global background colour to white and text to black (I know defaults alone will not do it), then this is all I need at this stage

Thank you kindly...