“…However, some research has led to alternative, and currently debated models (Abbott, Cumming, Fidler, & Lindell, 2013;Killgore & Yurgelun-Todd, 2007), describing the laterality of emotional processing: the Valence-Specific Hypothesis, that positive expressions (i.e. happiness, and by some accounts surprise) are preferentially left hemisphere processed, with negative emotions showing a right hemisphere bias (Adolphs, Jansari, & Tranel, 2001;Ahern & Schwartz, 1985;Jansari, Rodway, & Goncalves, 2011), and the associated approach-withdrawal related model in which approach emotions (anger, happiness, surprise) are left hemisphere dominant and withdrawal-related emotion (disgust, fear, and sadness) are right hemisphere dominant. The key variation between the latter two is the lateralization of anger (Harmon-Jones, 2004).…”