Beauchamp:ECogAnalysisv2

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Brain picture
Beauchamp Lab



To search for things on the wiki, use Google's site search feature. For instance, to find an Experiment Sheet, type

 site:openwetware.org/wiki/Beauchamp ExperimentSheet

The first step is to load the appropriate files into the "S" data structure. Here are the components of the S data structure:

                fileName: {'YAODatafile017'  'YAODatafile018'}
             chanDesList: {1x68 cell}
                  images: 8
              imageNames: {6x1 cell}
                 kStimOn: 80
               kImageMin: 4096
    kResponse_leftbutton: 128
   kResponse_rightbutton: 129
                      Fs: 2000
               startTime: 0
              sampleTime: 0.5000
         trialTimeCourse: [1x8000 double]

Here are what the elements of the data structure represent:

  1. filename: Name of the raw data file. Each session of an experiment is recorded in a separate datafile.
  2. chanDesList: List of electrodes written according to the montage.
  3. images: Number of different stimuli (conditions) presented in this experiment.
  4. kStimOn: Stimulus onset. The onset of each presented stimulus is registered as an event. Stimulus onset events are always denoted by 80.
  5. kImageMin: Denotes the first stimulus. Every stimulus has a code number but the code number for the first stimulus is always 4096. 4097 denotes the second stimulus, 4098 denotes the third stimulus etc.
  6. kResponse_leftbutton: Left mouse button presses are registered as 128.
  7. kResponse_rightbutton: Left mouse button presses are registered as 129.
  8. Fs: Sampling frequency. The data is recorded at 2000 Hz.
  9. startTime: Start time of the recording.
  10. sampleTime: Time between each sample point (1/Fs) in milliseconds.
  11. trialTimeCourse:

Information about data files (i.e which experiment session is recorded under which data file) and electrode montage can be found in the physiology file of each subject.

e.g. /Volumes/data/UT/YAO/YAOPhysiology.docx
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