Implementing your experiment
Purpose
This section provides information to help you out designing your MEG experiment. What is meant by experiment, is the stimuli involving usually visual and auditory or other perception-type stimulus. The experiment defines the timing of display of the stimuli, tracks responses from the participants and controls the different settings related to the content being presented to the participant. This section also provides the requirements that should be met to run your experiment in the NYUAD MEG Lab.
There are three tools primarily used for designing the experiment
Psychotoolbox
Presentation
Psychopy
Definning the hardware needs for your experiment
Depending on your study you might need different require different hardware, the following use cases can be identified:
Show visual stimuli to participants for a certain amount of time
Allow participant to send their input via buttons
Get eyetracking information from the eyetracker device
Provide audio to the user
Record audio from the user’s voice
Hardware involved in experiment
Propixx
Datapixx
Eyetracker
Datapixx pixel mode Pixel mode.
The eyetracker sends three different signals to the MEG/EEG channels:
The X-coordinates of the eye as function of time
The Y-coordinates of the eye as function of time
The Area of the pupil of the eye as function of time
Files produced by the experiment design
An experiment in PsychToolBox is a .m MATLAB script.
Presentation provides a .exp file, an experiment file.
PsychoPy is a .py experiment file.
If using python library PsychoPy:
Open the file with .psyexp extension
you can run from within the psycopy builder the experiment file with .psyexp extension c