Unwanted variation in presentation duration and delays related to number of times in a loop.
I'm building a very straight forward paradigm with a practise block and 5 experimental blocks.
Four of the experimental blocks simply present text via Sketchpads sequentially with a fixed duration determined in keyboard_response.
I use Sketchpads instead of images of text so that we can make changes quickly etc if we need to:
I'm building the experiment using Windows 10 on a Surface Book 2.
I've noticed that when there a relatively few items in a block (such as the screenshot of Alpha_Block_Sequence above) and a key is pressed the next trial begins 'immediately'. However, when there are relatively more items as shown here:
there is a perceptible delay after a keypress before the next trial begins. Is there something I can do to avoid this happening?
Additionally, in the block below:
I have set each image to 1000ms (995 instructed) and to repeat each image 5 times randomly. The presentation order works fine but I notice a large variation in presentation time accuracy. Most are presented for approximately the requested 1000ms but random iterations of pictures are presented for longer than 1000ms. Is this likely to be an issue with my system?
Hope I've provided enough information/context on this, let me know if not.
Thanks for your time,