The evidence is much more strongly in favor of amphetamine being actually poisonous (neurotoxic) than ritalin. Even then, it only happens at higher higher than a certain, not really well known dosage.
You might like playing around with Neuro-Programmer 3. You can get substantially similar or even stronger effects to EEG neurofeedback with simple audio brainwave entrainment. I actually question the value of EEG neurofeedback not combined with audio brainwave entrainment, which serves the purpose of teaching people what different brainwave states feel like. http://www.transparentcorp.com/products/np/index.php You can hook up an EEG to it to. Or build your own for a few hundred, http://openeeg.sourceforge.net/, but the signal processing is actually the hard part. Among the cheap commercial EEG products I've tried, only the NeuroSky Mindwave filters out facial movements well, but it's one sensor is not really useful for doing much of anything.
The kind of meditation that helps with ADD is concentration meditation, where starting Vipassana, when you focus intently on watching your breath, is a concentration meditation.
You might like playing around with Neuro-Programmer 3. You can get substantially similar or even stronger effects to EEG neurofeedback with simple audio brainwave entrainment. I actually question the value of EEG neurofeedback not combined with audio brainwave entrainment, which serves the purpose of teaching people what different brainwave states feel like. http://www.transparentcorp.com/products/np/index.php You can hook up an EEG to it to. Or build your own for a few hundred, http://openeeg.sourceforge.net/, but the signal processing is actually the hard part. Among the cheap commercial EEG products I've tried, only the NeuroSky Mindwave filters out facial movements well, but it's one sensor is not really useful for doing much of anything.
The kind of meditation that helps with ADD is concentration meditation, where starting Vipassana, when you focus intently on watching your breath, is a concentration meditation.