Hi Philippe,

we have recently conducted two metaanalyses on mindfulness in the workplace, one more general and one specific for healthcare professionals. We also calculated moderator analyses for some variables, including length of the intervention in one case, and intensity (length + frequency + homework) in the other. In general, no large differences were found, although there was some effect on outcomes such as positive well-being favouring more intense programs. You can have a look at the full texts on my RG profile if you want, are the ones published in The Journal of Positive Psychology and Mindfulness.

Good luck with your research!

I have recently prepared preprint of article connected with your question, but it is only on Polish: Preprint Optimal duration time of meditation practices (systematic re...

Hi Philippe,

We have recently reviewed the relevant research literatures in the last decade, we found that short-term training of meditation (training time < 8 weeks) may also produce (1) positive changes of mindfulness level and emotional state; (2) improved cognitive function and creativity; (3) reduction of addictive behaviors; (4) increased pain tolerance; (5) better regulation of the autonomic nervous system; (6) decreased cortisol release; (7) increased secretory immunoglobulin A; (8) altered electroencephalographical activities; and (9) plastical changes in brain connection.

Perhaps, you can try a 4-day 20min program. It may induce some state changes in state anxiety, and improve visuo-spatial processing, working memory, and executive functioning.

Wang, Y., & Luo, F. (2017). Effectiveness of Short-term Meditation: Progress,Issues and Prospects. Chinese Journal of Clinical Psychology, 25, 1184-1190.

Zeidan, F., Gordon, N. S., Merchant, J., & Goolkasian, P. (2010). The effects of brief mindfulness meditation training on experimentally induced pain. J Pain, 11(3), 199-209. doi: 10.1016/j.jpain.2009.07.015

Zeidan, F., Johnson, S. K., Diamond, B. J., David, Z., & Goolkasian, P. (2010). Mindfulness meditation improves cognition: evidence of brief mental training. Conscious Cogn, 19(2), 597-605. doi: 10.1016/j.concog.2010.03.014

Zeidan, F., Martucci, K. T., Kraft, R. A., McHaffie, J. G., & Coghill, R. C. (2014). Neural correlates of mindfulness meditation-related anxiety relief. Soc Cogn Affect Neurosci, 9(6), 751-759. doi: 10.1093/scan/nst041