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Cannabis harms motivation, study reveals


Cannabis users are commonly less active to work for money, a recent research study revealed  for the first time.

Dr. Will Lawn, from University College London, the leader of the study, established that those who inhale cannabis would most likely choose a more effortless task when they are intoxicated. This motivation level might also affect their health and lifestyle in the long run when they are not high.

‘Although cannabis is commonly thought to reduce motivation, this is the first time it has been reliably tested and quantified using an appropriate sample size and methodology,’ said Dr. Lawn

According the published research in the Psychopharmacology Journal, 57 volunteers split into two different test were examined. During the study, 17 of them who are occasional cannabis users inhaled the equivalent of a single joint of cannabis. This selected group repeated the test on a separate occasion, but inhaled ‘placebo’ vapour which contained no cannabis.

They were later given two tasks, one with low effort attached with monetary reward and second with high effort with more monetary reward.

One of the researchers, Professor Val Curran said: ‘We found that people on cannabis were significantly less likely to choose the high-effort option. On the average, volunteers on placebo chose the high-effort option 50 per cent of the time for a money reward, whereas volunteers on cannabis only chose the high-effort option 42 per cent of the time.’

Further study revealed people who never smoked cannabis, nor consume alcohol or drugs carried the same task better that the addicted. The author suggested more research is needed before any conclusions can be reached.

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