64: Online harassment in context: trends from three youth internet safety surveys (2000, 2005, 2010)

Crimes Against Children Research Centre, University of New Hampshire (March 2014) 
A summary of the results of the 3 large scale and nationally representative YISS Surveys undertaken in the USA to quantify youth experiences with unwanted sexual solicitations, harassment and unwanted exposure to pornography online. Respondents were young people aged 10-17, who had used the Internet at least once a month for the past 6 months, and a caregiver. Data collection for YISS-1, YISS-2, and YISS-3 occurred between August 1999 and February 2000, March and June 2005, and August 2010 and January 2011 respectively. For all three YISS studies, a sample size of 1,500 was predetermined based upon a maximum expected sampling error of < 2.5% at the 5% significance level.