Raymond Novaco of University of California Irvine, who since 1975 has published a plethora of literature on the subject, stratified anger into three modalities: cognitive (appraisals), somatic-affective  (tension and agitations), and behavioral (withdrawal and antagonism).[2] William DeFoore, an anger management writer, described anger as a pressure cooker: we can only apply pressure against our anger for a certain amount of time until it explodes.[3]
Raymond Novaco wale Univhesithi ya California Irvine, loyi a tsaleke hi vukarhi ku sukela hi 1975, u hambanise vukarhi hi swiyenge swinharhu: Vukarhi byo tshinya, Vukarhi bya matitwele, vukarhi byo ti hambanisa.[2] William DeFoore, loyi a tsaleke hi ku kongomisa no hunguta vukarhi, u hlamusele vukarhi tani hi mukapa lowu phyaphyarhaka: hinga khoma vukarhi bya hina kufikela nkarhi wokarhi laha byi bulukaka.[3]