In order to secure a representative sample of adolescents, we recruited students during normal school hours in required classes stratified by grade level (e.g., English). Students completed all measures during the spring semester of 2010, between the months of February and May. All students were eligible to participate in the study. We used a multi-stage approach to obtain active written parental permission. A member of the research staff attended each class period twice prior to the assessment to describe to the students the purpose and general design of the study and to answer any questions. Students were sent home with detailed information about the study in both English and Spanish, along with a parental consent form for their parents to review, sign, and return. Regardless of whether parental permission was granted, students who returned a parental permission form received a $5 gift card to a local retailer.
