>Our study also revealed many participants can distinguish between a placebo and active cannabis, despite having the same odour, taste and appearance. If they a

>Our study also revealed many participants can distinguish between a placebo and active cannabis, despite having the same odour, taste and appearance. If they are aware that they are receiving or not receiving cannabinoids, they are more likely to provide a biased assessment of the effectiveness of the intervention. So to ensure researchers are observing the actual effect of cannabis, participants can’t know what they receive. how do they go about doing this then