Social learning theory proposes that juveniles learn delinquent behavior from others through reinforcement, beliefs favorable to delinquency, and modeling. Reinforcement, whether positive or negative, increases the likelihood that a behavior will reoccur. Beliefs that justify or excuse delinquency also increase its likelihood. Modeling of delinquent acts by individuals respected in a social group leads to imitation of that behavior. Warning signs for probation officers include beliefs that violence is acceptable and a tendency toward risk-taking behaviors without responsibility. Continuing delinquent behaviors can be influenced by lack of parental guidance or constant labeling, while desisting may come from observing negative consequences or being shown alternative opportunities.