Meditation

Meditative states are associated with increases in slow-frequency theta activity across broad areas of the brain.

Try this: Working with partner to observe your brain activity, close or defocus your eyes and concentrate your attention on your breath. If another thought comes into your mind, gently acknowledge it and then refocus on your inhales and exhales. Do this meditation technique for about 30 seconds. Your partner may see increases in theta activity during the times you were actively meditating. Switch roles and try again.

Note: For best results, set the gain of the Theta frequency band at the center of its dynamic range and turn down the other frequency bands.