“…Similarly, Brody, Veit, and Rau (1997) found that IM was inversely related to the heart rate change elicited by a mental stressor. Other studies have also found negative, null, or ambiguous (i.e., negative or null on some but not all indices) physiological stress reactions (heart rate, cortisol level, skin conductance reactivity) among individuals high in IM under stress manipulations (Blackhart et al, 2007;Feldman, Lehrer, Hochron, & Schwartz, 2002;Mente & Helmers, 1999;Movius & Allen, 2005;Najström & Jansson, 2006;Pauls & Stemmler, 2003;Tomaka, Blascovich, & Kelsey, 1992). Fewer studies have reported that IM was positively associated with stress reactions (King, Taylor, Albright, & Haskell, 1990;Nyklicek, Vingerhoets, Van Heck, & Van Limpt, 1998;Warrenburg et al,1989) 2 .…”