The study has less to do with using a vaporizer and more to do with using equal amounts THC and CBD.

What they don't mention that I find interesting is whether it was administered in a concentrated vaporizer oil format or, buds put in an old school vaporizer. They also don't mention if participants were new or familiar to vaporizing. I think this could be cause for dispute of the results.

There's a potential that participants that had the combo were more used to vaporizing vs others that just had the thc vs the control.