VPixx Online Classroom And Library (VOCAL)
VOCAL is a collection of online tutorials created by VPixx staff and contributors. VOCAL aims to help researchers learn about VPixx device functionality and how to optimize it for their research. Code examples and snippets are provided throughout.
Modules with the Guide tag include general explanations of device features, while the Project tag means the module includes step-by-step instructions for creating a simple experiment in MATLAB or Python. For more information, click on some of the modules below.
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Record Response Times With a RESPONSEPixx Button Box
Calculate response times with respect to the video refresh of a visual stimulus using the RESPONSEPixx and MATLAB/Psychtoolbox.
Contributed by: Dr. Sophie Kenny, VPixx Technologies
Gamma-Correct the Luminance of a Display
Sample the luminance of any display using an X-Rite photometer or colorimeter. Calculate the gamma value that characterizes the non-linearity of your display. Generate and apply the gamma-correction color lookup table that will linearize its luminance.
Contributed by: Dr. Sophie Kenny, VPixx Technologies
Visualizing Gaze Data
The TRACKPixx3 data format and automatic event flagging make visualizing gaze data easy. This project shows how to plot raw eye traces, heat maps, and fixation and saccade events for a single trial. Sample data is provided.
Contributed by: Dr. Lindsey Fraser, VPixx Technologies
Sending Triggers with Pixel Mode
Use the top leftmost pixel on your display to send custom digital TTL triggers synchronized to frame onset
Contributed by: Dr. Lindsey Fraser & Dr. Sophie Kenny, VPixx Technologies
Introduction to Eye Tracking with the TRACKPixx3
This project explores the data output of the TRACKPixx3. Includes code and sample data.
Contributed by: Dr. Lindsey Fraser, VPixx Technologies
Introduction to Registers and Schedules
An introduction to two of the key synchronization features of VPixx hardware, with code examples
Contributed by: Dr. Lindsey Fraser, VPixx Technologies