Inclusion criteria Inclusion criteria were: (i) age 1860 years, (ii) regular ( once per month and 3 times a week) use of cannabis and tobacco in joints for the last 6 months, (iii) self-reported (SR) ability to smoke one whole standard joint, (iv) normal or corrected-to-normal vision, (v) fluent English, (vi) SR abstinence from tobacco, cannabis, alcohol and other drugs for 12 h prior to each session, (vii) alveolar CO 6 ppm to confirm no recent smoking on each test day (Cooper & Haney, Reference Cooper and Haney2009)
Researchers remain concerned about a small number of compounds which still provoke debate, primarily aldehydes
Take breaks between sessions if you already have sensitive teeth
Thats not to say they will all quit smoking
If you pay close attention to the images, you can spot unusual tells that they are not real
Very deep and rich with solid black tones (so no grey, burgundy or brown tones)