it's 4 x 20 minutes, according to these articles about the paper: http://www.sciencedaily.com/releases/2010/04/100414184220.htm http://www.sciencedaily.com/rele

it's 4 x 20 minutes, according to these articles about the paper: http://www.sciencedaily.com/releases/2010/04/100414184220.htm http://www.sciencedaily.com/releases/2010/04/100414184220.ht... http://living-mindfullyblog.blogspot.com/2010/05/cognition-accelerated-by-just-4-x-20.html http://living-mindfullyblog.blogspot.com/2010/05/cognition-a... This one claims to have the fulltext, but their webpage is broken for me: http://www.researchgate.net/publication/42975499_Mindfulness_meditation_improves_cognition_Evidence_of_brief_mental_training http://www.researchgate.net/publication/42975499_Mindfulness...