MindFlex in PSY 348 – 2013

[Update: Lytro featured our images on their Facebook page.]

Once again, as part of our discussion of EEG, I brought out the MindFlex game to allow students to use their brain waves to levitate a ball.  OK – a fan levitated the ball, but sensors detected the level of theta activity in the student’s frontal lobe and adjusted the fan’s strength accordingly.  Students got a lesson in the recording of brain activity, and I got some great photos.

A small blue ball can be seen in many of the photos.  It is being held aloft by a fan, and stays in place over the fan because of the Bernoulli effect. The operator controls the strength of the fan with his/her brain waves, and turns a dial to move the fan around the course.  With practice one can become quite good at  regulating the fan’s speed.  The times required to complete the course varied among the students who tried, ranging from 1′ 40″ to 4′ 30″.

This device offered a great opportunity for some Lytro pictures.  The Lytro plenoptic camera allows refocusing after a picture is taken, and allows a slight perspective shift.  Click on the icon in the lower right of any of these images and select “See on Lytro.com” to see about 2 dozen images from this exercise.

And of course, where there is perspective shift there is the capacity to create some nice cross-view 3D images. To see the 3D effect, click on an image to enlarge it, then cross your eyes until the left and right images fuse into a 3-dimensional central image.  Well worth the effort, and you get better at it with practice.  Enjoy!

Lytro Facebook Page, March 1, 2013

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