<qa>  What is the AQ?Vitiello and associates 1990, 1997 studied aggressive behaviors in children and adolescents and developed the Aggression Questionnaire AQ to classify aggression into predatory and affective subtypes. Subsequently, Malone et al., 1998 modified the instrument by making it a parent interview and increasing the range of scoring. The modified version, which will be used in this study, is a 16-item scale consisting of eight items that assess predatory aggression and eight items that assess affective aggression. Items are scored as not true 0, partly true 1, or very true 2. Predatory and affective scores are obtained by adding the corresponding items with a possible range from 0 to 16. The Predatory-Affective index is calculated by subtracting the affective score from the predatory score. Higher index scores indicate a predominantly predatory type of aggression while lower scores indicate primarily an affective subtype. This affective aggression is viewed as an overreaction to a minor provocation often accompanied by disinhibition and behavioral dyscontrol, characteristically impulsive. The AQ differentiated responders from nonresponders to lithium treatment in a group of aggressive conduct-disordered children Malone et al., 1998. 