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

[David McFarlane]

John,

Not answering the question you asked, but just tossing out another 
thought -- in addition to capturing sounds from the microphone to act 
as time markers in the recorded video, what if you put a mirror 
behind the subject somewhere so that the recorded video would also 
include whatever happens on the computer display?

-- David McFarlane


At 5/7/2014 02:13 PM Wednesday, John Goodrich wrote:
>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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