CB prevalence main study objective	Yes
Term Used	Cyberbullying
QRT Score (of 42 possible points)	27
Sample	425 middle school students from five middle schools in Kentucky; assessment time period “toward the end of the school term”
Demographics	11–16 years of age (M = 13.0, SD = .98); 59.5% female; 90.6% Caucasian, 2.4% African American, 1.6% Hispanic, 1.2% American Indian, 2.3% Other, 1.9% Missing
Assessment Tool	Author designed survey previously piloted and validated; 9-items (Cronbach’s α= .91); reporting time frame “during the school term”.
CB criteria	No criteria for point estimate of CB prevalence. ‘Infrequent bullies’ = engaging in cyberbullying a couple to a few times in the school term; “Frequent bullies” = weekly or more cyberbullying
CB Prevalence	Bully
	Frequent: 1.1%
	Infrequent: 16.8%

Note: Study conducted in US and Singapore; only data for US participants is reported.