Operational definitions Originally, researchers focused on overt forms of
victimization, which were categorized as either physical or verbal. Later, researchers such as
Nicki R. Crick argued for the existence of a more covert form of victimization which she observed primarily among females that she called
relational victimization, during which a child's social relationships and social standing are attacked via methods such as peer exclusion. Today, victimization is largely operationally defined as either covert/relational victimization or overt/physical victimization, in which a child is threatened with or dealt corporeal damage.
Research approaches and theories The study of peer victimization draws from two major strands of research as identified by Seely, Tombari, Bennett & Dunkle (2009) Prevalence research has been conducted in many different countries, cultures and classroom contexts. Studies utilize a variety of different methods such as self-report questionnaires, peer nominations, and teacher nominations have been used. Bullying strand research also focuses on the type of families that those who are victimized come from and what types of parenting styles they experienced A major determinant of how a person handles social evaluation is the degree to which they ascribe entity theories of personality, believing it their attributes are stable and unalterable or incremental theories of personality, viewing attributes as pliable able to be augmented Those who adopt entity theories of personality often pursue performance oriented goals, seeking to accrue positive and avoid negative evaluations of their competence. Since they view their attributes as constant, it is vital that they are desirable in order for them to maintain a positive self-image. People who hold incremental theories of personality endeavor towards mastery-oriented goals, focusing on learning and cultivating competence since as they believe their attributes are malleable. Accordingly, they should feel less threatened by others’ evaluations of their competence. When thinking about self-evaluation, implicit theories should affect the degree to which children base their self appraisals on peer judgements, determining whether negative social interactions undermine their well-being. In regards to behavioral reactions to victimization, research has identified two categories of characteristic responses. One contains externalizing behaviors such as aggression, disruptive, antisocial, and acting out behaviors (Achenbach, 1966). Another constitutes internalizing behaviors like inhibited, anxiety, or heightened withdrawal. Hawker and Boulton (2001) have used the
rank theory of depression to explain the relationship between forms of victimization and types of maladjustment. According to the rank theory, internalizing problems such as depression are linked to a sense of powerlessness and of not belonging. Those who are physically victimized suffer from low resource-holding potential, which works in part to delineate social power in peer groups, while relational victimization directly affects children's sense of belonging instead. Currently, researchers have become interested in the direction of the relationship between peer victimization and psychosocial adjustment. Some argue that the relationship is a bidirectional and causal relationship. As studies on the topic have generally utilized, cross-sectional research designs, a definitive answer has not been reached. ==Empirical findings==