improve timing for ERPs experiments


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tecnika
tecnika
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Hello,

I was wondering what would you recommend to improve the timing in an experiment where images are presented. There are software that allows for instance to preload the image or to reduce the screen resolution to improve the timing.

I am particularly interested in the delays between the trigger sent to an EEG system, in correspondence of a picture and appearance of the picture itself on the screen (as detected by a light sensor attached on the screen).

Currently I am presenting the stimuli with stimulusframes (that if I understood correctly provide a better timing  than the stimulustime attribute?) but when I analyse the delays I have sometimes a variability of up to 14ms (with an average delay of 3ms).

Thank you for any help you will be able to provide,

Elena


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