Kowal conducted experiments on 40 regular users of cannabis. The control group of 20 non-users were given a placebo. Kowal studied the direct and chronic effects of cannabis on dopamine-related functions, such as creative thinking and the ability to recognise one's own mistakes. The brain chemical dopamine is important for the proper working of the brain and also plays a role in learning performance.
Less Good At Brainstorming
Kowal's research showed that cannabis users were less able to brainstorm, a mental process that is crucial for creative performance: 'There is a widespread belief among users that these drugs enhance creativity. This experiment disproves that belief.'
Poor At Recognising Mistakes
Kowal also demonstrated that for chronic users the brain processes involved in monitoring mistakes also work less effectively. A high dose of cannabis seems to influence both the unconscious processing of mistakes and also the later and more conscious stages of error processing. Kowal: 'It is important that we gather more knowledge about the effects of cannabis on a person's ability to detect mistakes. This can help with putting together a treatment programme for drug addiction.'
Content Originally Published By: Science Daily