Display "response recorded" message after specific key presses

[Michael]

Oh, I keep forgetting and rediscovering this bug (specific to text stimuli). See below for a discussion and a workaround (ie use another sort of stimulus to hide and then uncover the text stimulus):

Opacity of text stimuli is not updating

Oh wow, you’ve hit upon an old bug/limitation that I’d forgotten about: i.e. controlling opacity for text stimuli doesn’t work like it does for other stimuli, unless the text content is also being changed at the same time. A work-around is suggested in the post below, where you can get the same effect indirectly, by having another stimulus (e.g. a filled polygon that matches the background colour of your window) overlap each text stimulus. When you want the text stimulus to be invisible, set…