“…Furthermore, long-term meditators show higher performance in the domains of sustained attention (Valentine & Sweet, 1999), executive attention (D. Chan & Woollacott, 2007;van den Hurk, Giommi, Gielen, Speckens, & Barendregt, 2010), and attention switching (Hodgins & Adair, 2010) as compared to matched controls. Studies investigating the effect of a 10-day and a 4-day mindfulness retreats respectively (Chambers, Lo, & Allen, 2008;Zeidan, Johnson, Diamond, David, & Goolkasian, 2010) revealed improvement in working memory capacity in meditators following the retreats. The latter study also observed that the meditators increased mindfulness level over an active control group (Zeidan et al, 2010).…”