 behavioral disorders. Behavioral disorders are also known as externalizing behavior. When we are saying externalizing behavior that mean that children exhibit these behaviors in a form of outward behaviors and when we are saying behavioral problems that mean that children are exhibiting disruptive behaviors which negatively influence their environment and which may cause problems at the home or school or in their social situations. So if you want to understand it in simple words, it means that the children who show problematic behaviors in their home or school, we classify those children under the behavior disorders. In behavior disorders, they are usually classified as those behaviors which are observable and which are affecting the environment. Now when it comes to affecting the environment, then what are the disorders which we classify under the heading of behavior disorders? There are three behavioral disorders which are categorized as number one, ADHD, number two, oppositional defiant disorder, number three, conduct disorder. When we talk about attention deficit hyperactivity disorder, it means that the child is so hyperactive and his attention is so much that he is unable to properly follow his environment. Since he is unable to sit comfortably in the environment, for example, if there is a school setting, he is unable to express on-seat behavior because of which his environment is negatively affecting. Similarly, if he is impulsive, then due to his impulsivity, he will do so much fidgeting in his environment and he will not let anything stay in his place because of which his external environment will be affected. This is the problem because of which along with the child, his external environment when it starts to affect, it causes distress. That is why it is also called externalizing problems or externalizing behavioral problems. Similarly, when we talk about the second disorder, that is the oppositional defiant disorder, ODD, then the behavior of the child manifests in the form of hostility, argumentation and irritability. The hostility of the child might be exhibit towards the parent, towards the authority figure, towards the sibling, towards the peer. This means that the child can be hostile in any setting, can be defiant in any setting, i.e. their disobeying behavior or argumentation with parents or with authority figure that might be the teacher which can be exhibit. Such children are irritable to some extent, they get angry very quickly and irritable, i.e. they get irritated very easily on a small matter because of which their anger and outburst are observed. Again, their behavior is affecting their external environment negatively. And then the third is the conduct disorder. Conduct disorder is actually a sequence of oppositional defiant disorders of children who have oppositional defiant disorder before age 18. They are very likely to have conduct disorder when they will be in their adulthood. But this is not compulsory, this is not necessary. There are cases where ODD is recovered during adolescence time period. What is the conduct disorder basically? Conduct disorder is a severe form of ODD. How is the severe form of ODD? In this, the child reflects severe aggression and anger. When we talk about severe anger or severe aggression, what does it mean? The child can harm someone's property. He can harm someone, i.e. cause an injury. These are the kinds of children who damage someone's property. And if they don't damage their property, they can cause fire somewhere. These kinds of behaviors, which are destructive behaviors and which are negatively influencing the external environment, are classified under the heading of conduct disorders. Conduct disorders is a form of antisocial personality and these are adults who have ODD or CD in their childhood, i.e. conduct disorder.