“…If ideation is a form of repetitive thinking that is linguistic (see Segerstrom, Stanton, Alden, & Shortridge, 2003), like rumination, a tendency to ruminate in the form of brooding on one's negative mood might increase vulnerability to having thoughts about suicide. In addition, past research suggests that rumination is characterized by an inflexible and perseverative cognitive style (Davis & Nolen-Hoeksema, 2000;Watkins & Brown, 2002) that can interfere with effective problem-solving (Lyubomirsky & Nolen-Hoeksema, 1995;Watkins & Baracaia, 2002) and mood regulation, deficits which are known to be associated with suicidality (e.g., Howat & Davidson, 2002;Williams, Barnhofer, Crane, & Beck, 2005;Zlotnick, Donaldson, Spirito, & Pearlstein, 1997).…”