Preferential looking paradigm -- Have E-Prime start webcam recording at beginning of experiment

[John Goodrich]

Hi Everyone,

I am developing a preferential looking paradigm to investigate semantic 
priming effects using E-Prime. The setup is a dual monitor setup with a 
Logitech webcam attached between the two monitors to track where the 
participant is looking. Does anyone know of a method to have E-Prime start 
the webcam recording when the experiment starts? The webcam is hooked into 
a docking station via a USB port. Being able to start the webcam at the 
exact same time as the experiment would make the process of coding the 
video much easier. Otherwise, I will have to listen for onset of the audio 
files played by E-Prime in the video and begin coding at a certain duration 
after the audio began, when the images were set to appear. 

Thanks,

John Goodrich

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