Notes on Reading Experiments

Creating Experiments

Under Construction.

Data Analysis

Assuming your experiment has run well, you first need to export your .EDF files to .ASC (ASCII, human-readable) files using the EDFtoASC tool on the lab display machine.

The next step is to process each ASC file using EyeDoctor to create .DA1 files, one per participant. EyeDoctor is used to fix "problems" in the eyetracking recordings, such as unlikely fixations and blinks, which might otherwise distort your findings.

Together with the .DA1 files, you'll need region (.cnt) files, generated from the original experimental .script file(s). To make these, start with a copy of the .script file; add a slash character / at the end of every region, including the last one (it's conventional to leave a space after the final full stop). So if your original item was

trial E2I1D0
  gc_rect =          (0 0 0 0)
  inline =           |John drove from Edinburgh to Birmingham, listening to his favourite\njazz CDs. When he arrived in Birmingham, he filled up the car with\npetrol. That took him 5 hours, and afterwards he was happy to have\nenough time to go to his hotel to have a rest.
  max_display_time = 60000
  trial_type =       Reading
end E2I1D0

an item marked up for regions might look like
trial E2I1D0
  gc_rect =          (0 0 0 0)
  inline =           |John drove from Edinburgh to Birmingham, listening to his favourite\njazz CDs. When he arrived in Birmingham, /he filled up the car with\npetrol. /That took him /5 hours, /and afterwards /he was happy to have\nenough time to go to his hotel to have a rest. /
  max_display_time = 60000
  trial_type =       Reading
end E2I1D0
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