[blululu]

Most but not all. The opposite trend is less common but totally possible from personal observations. saying that a psychiatric procedure will result in specific changes would be stretching the truth from probably to necessarily. The first result I found in Google related to Griffiths is here: https://pubmed.ncbi.nlm.nih.gov/31084460/ They are doing an anonymous online self selected reports and they find a strong effect but also 17% do not appear to exhibit the trend.

[ipnon]

For some perspective, this is the current state of the art pharmacological treatment for substance abuse disorder, as in no other available treatment has a stronger effect.