Ariel Shensa|Jane Phelps-Tschang|Elizabeth Miller|Brian A. Primack
A randomized crossover study of web-based media literacy to prevent smoking
University of Pittsburgh|Children's Hospital of Pittsburgh
feasibly implemented webbased smoking media literacy sml programs associated improving sml skills among adolescents however prior evaluations generally weak experimental designs aimed examine program efficacy using rigorous crossover design seventytwo ninth grade students completed webbased sml program based health behavior theory implemented using twogroup twoperiod crossover design students randomly assigned classroom receive media literacy control interventions different sequences assessed three times baseline t0 initial followup first intervention t1 second followup second intervention t2 crossover analysis using analysis variance demonstrated significant intervention coefficients indicating sml condition superior control primary outcome total sml f 1199 p 0001 seven nine individual sml items results consistent sensitivity analyses conducted using nonparametric methods changes exploratory theorybased outcomes including attitudes normative beliefs others conclusion strength design study supports extends prior findings around effectiveness sml programs influences theorybased mediators smoking explored