Motion Aftereffect (MAE) With Pulse Width Modulation (PWM)

Settings

What is this?

There are actually two stimuli present (you can add more) and each of them move toward a single direction. However, they alternate, so it looks like they're transparent. This alternating pattern is technically known as PWM. If you increase the PWM period (the length of each alternate) in the Settings, you can see the alternate pattern clearly.

The motion aftereffect (MAE) is a visual illusion that after watching a moving stimulus for some time, stationary objects appear to move in the opposite direction. For example, if you stair the stimulus for 30 seconds, and then click stop all button, you will see a motion toward the opposite direction.

Current version is one variation of the MAE. You should see an combined effect of the stimuli, when you stop the stimuli.

Tips

press 'SPACE' to stop and start all stimuli.
You can use space to stop and start all stimuli.
In the Control Panel, you can add more stimuli and specify the width and height of the stimulus.
New stimuli will be at the top right corner of the container. it may stack on top of each other. Drag them to see another one.

License

This project is licensed under the Creative Commons Attribution-NonCommercial 4.0 International License by Guang Yang (Spike).

Reference

Anstis, S., Verstraten, F. A., & Mather, G. (1998). The motion aftereffect. Trends in cognitive sciences, 2(3), 111-117.