VariablesThe variables considered in the present research werethe following: family variables, personal/behavior varia-bles and social variables. Family variables were measuredthrough Parental Monitoring Scale, constructed ad hoc forthe present research. Mother/Father Adolescent Relation-ship questionnaires were obtained from a research onchildren, youth and families at risk, carried out in Chile(Hernández et al., 1996). Other personal/behavioral/socialinstruments developed in the present research were RiskPerception Scale and Peer Pressure Scale. Additionally, well-known instruments were also applied: Antisocial Behavior