The datastreams attribute specifies which datastreams to enable for the expt, block, or trial.
<block> <expt> <likert> <survey> <surveypage> <trial>
or
/ datastreams = eyetrackeror
/ datastreams = falsefalse | Disables logging to datastreams. |
eyetracker | Enables logging to an eyetracker datastream. |
If datastreams is set to false, then nothing is logged to the datastreams for the expt, block, or trial. If set to eyetracker, then eyetracker information will be logged for the duration of the expt, block, or trial.
The following enables eyetracking for all trials in the current block:
<block someblock>
/ datastreams = (eyetracker)
</block>
The following disables eyetracking for the current trial:
<trial sometrial>
/ datastreams = false
</trial>