RT Article T1 Reliability and validity of young adults’ anonymous online reports of marijuana use and thoughts about use JF Psychology of addictive behaviors VO 26 IS 4 SP 801 OP 811 A1 Ramo, Danielle E. A2 Prochaska, Judith A2 Liu, Howard LA English YR 2012 UL https://krimdok.uni-tuebingen.de/Record/1912684217 DO 10.1037/a0026201