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Thread: recording participants during a study

  1. #1
    Join Date
    Jan 2008
    Posts
    3

    recording participants during a study

    Is it possible to record video and to be able to time-lock this video to what is presented on the screen in Medialab and/or DirectRT? We have several studies where it'd be useful to be able to code participants facial reactions during stimulus presentation. If this is possible, what hardware and software would I need?

  2. #2
    Join Date
    Nov 2005
    Posts
    294
    A few years back we designed some hardware specifically to address this issue.

    It's a black box which accepts video from the source of your choice (usually a camera), overlays data on the video frame, ala closed captioning, and outputs video to a VCR, DVD recorder or computer with a video capture card.

    It's receives data from within a MediaLab experiment and displays that data on the screen.

    For more details, see http://www.empirisoft.com/custom/02.aspx (note we do not generally do custom hardware anymore but depending on the job requirements we remain open-minded!

    Also, note that the current version of the system uses a standard serial port, rather than the older parallel port.

    John
    Last edited by jarvis24; 11-23-2010 at 04:11 PM.

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