Well “Brain Training” is regarded as the height of quackery in psychology, though I’m sure a certain Japanese doctor would disagree, but if you read Villatte, Villatte and Hayes “Mastering the Clinical Conversation” you will see that “role playing” is not the therapy itself, and it has absolutely no theraputic value, it’s a way to engage people in a way that they find comfortable.
You can also refer to “Reaching out to Problem Anger: Assessing the Effectiveness of One-Day Cognative Behavioural Workshops in a community setting in the UK” by Illman & Brown, and “Self Practice and Self Reflection in Cognitive Behavioural Therapy Training: What factors influence Trainees’ engagement and Experience of Benefit” by Bennett-Levy & Lee for further, peer reviewed, CUP published information.
We can, further more advance the quite sound logic that if a group of people have been conditioned to one way of thinking, then every problem starts to look like the toolbox they have “The incidence of diagnostic error in medicine” Graber, “Do Physicians Know when THeir Diagnosises are Correct? Implications for Decision Support and Error Reduction” Friedman (We are not worthy) et al
So lets tackle our problem from a different angle, just to belt and braces, we know that if a group has been condtioned, they do tend to narrow their solutions down to the way they’ve been conditioned. So if your fear is correct, and people exposed to a lot of violence in roleplay and in video games have been conditioned to readily see the violent solution first, then we should see increased violence in their responses to stimuli. I present:
Click here to expand the giant list
Cunningham, Engelstatter & Ward "Violent Video Games and Violent Crime"
Adolphs "Cognitive neuroscience of human social behaviour"
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Anderson & Dill “Video games and aggressive thoughts, feelings, and behavior in the laboratory and in life.”
Anderson, Shibuya, Ihori, Swing, Bushman, Sakamoto et al “Violent video game effects on aggression, empathy, and prosocial behavior in Eastern and Western countries: a meta-analytic review.”
Andresen “Inventar Klinischer Persönlichkeitsakzentuierungen (IKP). Dimensionale Diagnostik nach DSM-IV und ICD-10”
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Bartholow, Bushman & Sestir “Chronic violent video game exposure and desensitization to violence: behavioral and event-related brain potential data”
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Phew!!! All that remains is to show you some level of evidence that I may have thought about this subject, perhaps even in a professional capacity, and I am not some google fu warrior:
Obviously, it’s the shopping list game that’s the relevant data in this photograph