I think these effects are Psychosomatic in nature. People naturally try to embody the positions they are expected to embody. I have seen people exhibit this type of behavior for a long time. Here is a gamer explaining the same effect:
If you want to be a big-ideas person at work, suit up. A paper in August 2015 in Social Psychological and Personality Science asked subjects to change into formal or casual clothing before cognitive tests. Wearing formal business attire increased abstract thinking—an important aspect of creativity and long-term strategizing. The experiments suggest the effect is related to feelings of power.
For better focus, get decked out like a doctor. In research published in July 2012 in the Journal of Experimental Social Psychology, subjects made half as many mistakes on an attention-demanding task when wearing a white lab coat. On another attention task, those told their lab coat was a doctor's coat performed better than either those who were told it was a painter's smock or those who merely saw a doctor's coat on display. —Matthew Hutson
Game Theorists Doing Their Research
I don't consider color or clothing to be able to control human behavior. But these things can influence/nudge people towards certain directions. It only works if we ourselves consciously or subconsciously give permission for ourselves to act these ways. If we become more aware of our own thoughts, these findings could be a great life hack.
