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    Introduction:

    Man has always strived to know himself and his environment. Subjects such as psychology and

    other basic and applied sciences have been instrumental in this task. Psychology, especially has

    helped in the study of human behavior in relatio0n to the environment resulting in a better

    adjustment and adequate development of the individual for happy and contended life.(Miller 2006).

    Psychology is a specialized field dealing with personality disturbance and behavior disorders.

    Personality is an individual is an individuals habitual way of thinking, feeling, perceiving and

    reacting to the world. Some psychologists that personality is stable and immutable, others view as a

    more fluid concept. Emotions, behavior etc are also concerned with personality and character and

    understanding the basic forces within all human beings.

    There are three fundamental or basic emotions: love, fear, and anger. These are present even at

    birth. However some emotions such as hatred, jealousy etc develop later. Emotions of anger may

    last for only a few seconds or minutes. Darwin(2002) defined anger as a harmful and damaging

    attack upon other people. When anger gets out of control, however, it becomes destructive then

    this condition leads to aggression. According to Deeming(2004), aggressive behavior to simply the

    personality disorder. Aggression is only one of many possible instruments responses to frustration

    that is because it often leads to reinforcement. Moreover, while our present interest is in aggression

    that is stimulated by frustration, it is important to note that aggression can also occur with

    frustration antecedent.

    Aggression is an overt behavior intended to inflict damage on another individual. Human

    aggression is relatively rare - when was the last time you inflicted damage on someone, or were the

    victim of a physical assault? But it is very likely that you have been at the receiving end of a

    person's dominance behavior. Humans use threats and violence to dominate, but we also resort to

    cheating, deceit or negotiation to obtain status and valued resources. In fact a lot of our behaviorinvolves strategies for existing with each other without causing or risking actual physical damage.

    In psychology, as well as other social and behavioral sciences, aggression refers to behavior

    between members of the same species that is intended to cause pain or harm. Predatory or

    defensive behavior between members of different species is not normally considered "aggression."

    Aggression takes a variety of forms among humans and can be physical, mental, or verbal.

    Aggression should not be confused with assertiveness, although the terms are often used

    interchangeably among laypeople, e.g. an aggressive salesperson.*(

    http://en.wikipedia.org/wiki/Aggression)

    http://en.wikipedia.org/wiki/Psychologyhttp://en.wikipedia.org/wiki/Social_sciencehttp://en.wikipedia.org/wiki/Behavioral_sciencehttp://en.wikipedia.org/wiki/Behavioral_sciencehttp://en.wikipedia.org/wiki/Predatoryhttp://en.wikipedia.org/wiki/Assertivenesshttp://en.wikipedia.org/wiki/Assertivenesshttp://en.wikipedia.org/wiki/Psychologyhttp://en.wikipedia.org/wiki/Social_sciencehttp://en.wikipedia.org/wiki/Behavioral_sciencehttp://en.wikipedia.org/wiki/Predatoryhttp://en.wikipedia.org/wiki/Assertiveness
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    Categories of aggression:

    According to Behar, et al (1990),Berkowitz, L. (1993), Bushman, B.J.; Anderson, C.A. (2001).

    McElliskem, (2004).There are two broad categories of aggression. These include hostile, affective,or retaliatory aggression and instrumental, predatory, or goal-oriented aggression. Empirical

    research indicates that there is a critical difference between the two, both psychologically and

    physiologically. Some research indicates that people with tendencies toward "affective" aggression,

    defined in this study as being "impulsive, unplanned, overt, or uncontrolled" have lower IQs than

    those with tendencies toward "predatory" aggression, defined here as being "goal-oriented, planned,

    hidden, or controlled".In moral theories, such as argumentation ethics and the non-aggression

    principle, physical aggression is distinguished from violence. Aggression is considered the

    initiation of violence. Often, retaliatory violence and defensive violence is not considered

    aggression, because it is a responsive action.

    Types and sources of aggression:

    According to Bano & Woolfolk(2004) there are ten main types of aggression such as Displayed

    aggression, Scapegoating, Self aggression, Free floating aggression, Fear motivated aggression,

    Redirected aggression, Intrumental aggression, Hostile aggression, Overt aggression and relational

    aggression, how ever according to Coker (2002), Maslow(2000), Block(2004), Dum(2003),

    Woolfolk (2004) the sources of aggression are Unfulfilled human needsand desires, Neorosis,

    Despiration, Greed, Collectivevism, Attack, Frustarion and compettion. Brain (1981), divided

    aggression into: predatory attack , self-defensive behaviours , parental-defensive behaviours, social

    conflict .

    What triggers aggressive behavior in children?

    Physical fear of others, Family difficulties, Learning, neurological, or conduct/behavior

    disorders, Psychological trauma*(Taylor CA, Manganello JA, Lee SJ, Rice JC (May 2010).

    "Mothers' spanking of 3-year-old children and subsequent risk of children's aggressive behavior".

    Pediatrics125 (5): e105765.)

    Theories of aggression;

    Thomas (2005) gave many theories about the causes of aggression. The first and most

    omportant is Frustration-aggression theory, proposing thart agggression is a response to the

    http://en.wikipedia.org/wiki/Affectivehttp://en.wikipedia.org/wiki/Revengehttp://en.wikipedia.org/wiki/Predatoryhttp://en.wikipedia.org/wiki/Argumentation_ethicshttp://en.wikipedia.org/wiki/Non-aggression_principlehttp://en.wikipedia.org/wiki/Non-aggression_principlehttp://en.wikipedia.org/wiki/Violencehttp://en.wikipedia.org/wiki/Phobiahttp://en.wikipedia.org/wiki/Dysfunctional_familyhttp://en.wikipedia.org/wiki/Learninghttp://en.wikipedia.org/wiki/Neurologyhttp://en.wikipedia.org/wiki/Conduct_disorderhttp://en.wikipedia.org/wiki/Conduct_disorderhttp://en.wikipedia.org/wiki/Psychological_traumahttp://en.wikipedia.org/wiki/Affectivehttp://en.wikipedia.org/wiki/Revengehttp://en.wikipedia.org/wiki/Predatoryhttp://en.wikipedia.org/wiki/Argumentation_ethicshttp://en.wikipedia.org/wiki/Non-aggression_principlehttp://en.wikipedia.org/wiki/Non-aggression_principlehttp://en.wikipedia.org/wiki/Violencehttp://en.wikipedia.org/wiki/Phobiahttp://en.wikipedia.org/wiki/Dysfunctional_familyhttp://en.wikipedia.org/wiki/Learninghttp://en.wikipedia.org/wiki/Neurologyhttp://en.wikipedia.org/wiki/Conduct_disorderhttp://en.wikipedia.org/wiki/Conduct_disorderhttp://en.wikipedia.org/wiki/Psychological_trauma
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    frucstration of some goal directed behavior by an outside source. Instinct theory has been

    largely discredited in favour of other explanations. Socaial learning thery focuses on aggression

    as learned behavior.