erproduction of neurotransmitters dopamine and serotonin. Therefore treatment with drugs that block dopamine helps control such behaviours as aggressiveness, bizarre behaviour, and impulsivity.
             That diet, inadequate nutrition and food allergies may also cause disordered behaviour is a popular view in the community. In a number of cases, elimination of artificial colourings and flavourings reduces significantly the frequency of behaviour problems. Other studies have found that sugar adversely affects those with hyperactivity, and that vitamin B6 improves the behaviour of those with autism.
             Temperament, an inborn behavioural style, which may also be affected by developmental and environmental events, is another possible cause of behaviour problems. For example, not all difficult babies grow to develop learning and behaviour problems, but they have a higher risk of developing strained parent-child relationships, inconsistent nurturing and high rates of conflict (Rosenberg et al, 2004, p.12), which may lead to future problems.
             The positive case for this model is that if the children are indeed affected by physical causes for their behaviour, modern medicine can diagnose and successfully manage the problem. If those affected cannot help their actions, parents, teachers and others in the child's life should not then have unrealistic expectations of the child, which could lead to further distress and possibly worsen problems such as low self esteem.
             However, on the negative side, the biological model doesn't attribute great importance to school events (Newcomer, 1993, p.37), so these theories do not provide many intervention strategies, which could actually help the disorder. Because of the physiological nature of the behavioural disorders, the teacher's role becomes relatively unimportant. This model also gives a rationale for low expectations of the child, and frees schools from accepting responsibility for contributing t...