Greif and colleagues raise an important issue regarding the assessment and measurement of bullying. While researchers generally agree on the definition of bullying from a conceptual standpoint, measurement of this construct is indeed difficult.1 Bullying involves not only aggressive behavior, but an intention to harm, an imbalance of power, and repetition over time. Adequately capturing all of these elements, while at the same time incorporating the many ways in which this aggression may take form, is a formidable task. As such, most measures of bullying probably fall short in fully delineating one or more of these elements.
Nansel TR, Overpeck MD. Operationally Defining "Bullying"—Reply. Arch Pediatr Adolesc Med. 2003;157(11):1135. doi:10.1001/archpedi.157.11.1134-a