**3. Results**

206 Complementary Pediatrics

can happen at school, online, or other places young people hang out. It is **not** bullying when two young people of about the **same strength** fight or tease each other. How often has this happened to you in the following environments?): 1) at school, 2) on the Internet, 3) on cell phones through text messaging, 4) on the way to and from school, and 5) somewhere else. For each environment, response options were: every day / almost every day; once or twice a week; once or twice a month; less often than once a month; never; and decline to answer.

Youth who reported bullying victimization in at least one environment were asked two follow up questions. First, these youth were asked to indicate how they felt when they were bullied in each environment, when thinking about the most serious incident. Responses were captured on a 5-point scale: not at all upset; somewhat upset; upset; very upset; extremely upset; and decline to answer. Second, youth were asked whether they knew their bully: "By "know" we mean you can recognize the person or you know who they are".

Unwanted sexual experiences also were measured using parallel items for experiences when online, and experiences when at school. Note that other environments, including on the way to and from school, and 'somewhere else' were not queried. Text messaging-based experiences were queried, but using different measures and therefore are not included in the current analyses. Items were based upon those included in and referred to as "unwanted sexual solicitation" in the Youth Internet Safety Surveys (Finkelhor, Mitchell, & Wolak, 2000; Wolak et al., 2006). We choose to call these experiences "unwanted sexual experiences" to avoid connotation that these youth were necessarily solicited for sex. Youth endorsing at least one of the following questions were classified as having an unwanted sexual experience: 1) Someone tried to get me to talk about sex when I did not want to; 2) Someone asked me for sexual information about myself when I did not want to tell the person, e.g., really personal questions, like what my body looks like or sexual things I have done; 3) Someone asked me to do something sexual that I did not want to do. Response options were: everyday/almost every day; once or twice a week; once or twice a month; a few times a year; less than a few times a year; never; and decline to answer. Perpetration was asked solely for the online environment. Similarly, distress was only queried for youth reporting victimization online. Given that the focus of the current paper is comparisons across

Data cleaning indicated that 18 youth were likely 9 years of age, and 12 youth were 16 years of age at Wave 1. To maximize the amount of data; and because caregivers did not know the eligibility criteria (and, therefore, were unlikely to have misreported their child's age

Data were weighted statistically to reflect the population of adults with children aged 10-15 years old in the U.S. in 2006 (when the sample was first recruited) according to adult age, sex, race/ethnicity, region, education, household income, and child age and sex.(Bureau of Labor Statistics & Bureau of the Census, 2006) Adults were the weighting target as they were the ones first recruited into the survey. Survey sampling weights also adjust for adult respondents' self-selection into the HPOL (Berrens et al., 2003; Berrens et al., 2004; Schonlau et al., 2004;

Taylor et al., 2001) as well as any differential follow-up of youth participants over time.

Response options were: yes, no, not sure, and decline to answer.

environments, these data are not reported.

**2.3 Data cleaning and statistical analyses** 

purposefully), these youth are included in the analyses.
