“…Both showed more novelty-seeking, less self-directedness and more self-transcendence than the controls. Higher levels of SS in the addict groups than in the controls were previously demonstrated (Malatesta et al, 1981;Cloninger et al, 1988;Galen et al, 1997;Ravaja and Keltikangas-Jarvinen, 2001;Gabel et al, 1997;Van Ammers et al, 1997;Masse and Tremblay, 1997;Heath et al, 1995;Pomerleau et al, 1992;Vukov et al, 1995;Ball et al, 1994Ball et al, , 1995Kusyszyn and Rutter, 1985). More contrasted results are found in the literature on harm avoidance, with some studies reporting lower levels (Wills et al, 1994), and others, like in the present study, higher levels (de Wit and Bodker, 1994).…”