Problematic involvement in online games: A cluster analytic approach

ADV = advancement (MPOGQ); SOC = socializing (MPOGQ); RP = role-play (MPOGQ); ESC = escapism (MPOGQ); URG = urgency (UPPS-P); LPR = lack of premeditation (UPPS-P); LPE = lack of perseverance (UPPS-P); SS = sensation seeking (UPPS-P); SE = self-esteem (SISE). Dashed lines refer to mean Z-scores of the entire sample. Bold lines refer to mean Z-scores for each specific cluster.