Table A1.

Items of Each Dimensions of Sexting Behaviors Questionnaire (SBQ).

Sexting Dimensions	SBQ Items
Own Sexts	How often have you privately sent provocative or sexually suggestive photos about yourself? How often have you publicly posted provocative or sexually suggestive photos about yourself on the web or social network sites? How often have you privately sent provocative or sexually suggestive videos about yourself? How often have you publicly posted provocative or sexually suggestive videos about yourself on the web or social network sites?
Risky sexting	How often have you sext when you were drinking alcohol? How often have you sext when you were smoking marijuana? How often have you sext when you were doing other drugs? How often have you sext with strangers or someone you know only from online?
Non-Consensual Sexting	How often have you privately sent provocative or sexually suggestive photos about your partner without his/her consent? How often have you privately sent provocative or sexually suggestive photos about someone you know without his/her consent? How often have you privately sent provocative or sexually suggestive videos about your partner without his/her consent? How often have you privately sent provocative or sexually suggestive videos about someone you know without his/her consent? How often have you publicly posted on the web or social network sites provocative or sexually suggestive photos about your partner without his/her consent? How often have you publicly posted on the web or social network sites provocative or sexually suggestive photos about someone you know without his/her consent? How often have you publicly posted on the web or social network sites provocative or sexually suggestive videos about your partner without his/her consent? How often have you publicly posted on the web or social network sites provocative or sexually suggestive videos about someone you know without his/her consent?
Sexting under Pressure	How often have you sext because your partner forced you? How often have you sext because your friends forced you?