Timing on a reaction time task (case 11321)
Timing on a reaction time task (case 11321)
Hello,
I'm using a Flanker task that times out at 450ms at which point, subjects receive an error message and move on to the next trial. What I would like, but can't seem to figure out, is to have the stimuli on the screen appear for 250ms and disappear afterwards to a blank screen (giving participants 200ms still to repsond: 450-250ms). Right now, it seems the stim have to remain on screen until the eventual time out.
Any help would be greatly appreciated.
Nick
Nick,
Can you send me a copy of this input file and any Styles file it uses? I'll be happy to take a look.
Jason
Sure, thing. See attached. Thanks, Jason.
Richie,
Type 0-450! in the MinMax cell of the style used in your Flanker task to create a 450ms response window that will automatically proceed to the next trial after 450ms. Take a look style 1 of the attached Styles file for an example.
To show the a stimulus for 250ms but then have it disappear for the remainder of the response window, type clear250 in the cell of the trial where you define any keypresses for your Flanker task; take a look at block 1 of the attached input file for an example. You can find more information about this in the Other Features > Clear Screen During and RT section of the DirectRT manual.
