“…The relationship between personality dimensions and speed of information processing (SIP) is an issue that has not been thoroughly examined yet, despite numerous studies of the relationship between intelligence and personality (Ackerman & Heggestad, 1997;Demetriou et al, 2003;Eysenck, 1994;Moutafi et al, 2005), and despite the fact that SIP is an important aspect of human intellectual functioning (Carroll, 1993;Danthiir et al, 2005a;Demetriou et al, 2002;Jensen, 2006). Sočan and Bucik (1998) studied the relationship between SIP, Extraversion and Neuroticism starting with Eysenck's arousal theory (Eysenck, 1967) and the Brebner-Cooper Extraversion model (Brebner, 1980).…”