Testosterone can make individuals cocky and impulsive, potentially contributing to miscalculations in risk assessment.

“Testosterone makes people cocky and impulsive. And that might be great in one setting, but if and the other is, you're absolutely sure your army is to get over on the other country in three days. So hell, let's start World War I, and you get a big surprise out of it. Testosterone altering risk assessment beforehand probably played a big role in that kind of miscalculation.”

“What's shown in economic game play is that testosterone by making you more confident makes you less cooperative because who needs to cooperate because I'm on top of this all on my own. Um, testosterone makes people cocky and impulsive and that may be great in one setting, but if in the others you're absolutely sure your army is going to overrun the other country in 3 days, so hell, let's start World War I and you get a big surprise out of it, testosterone altering risk assessment beforehand probably played a big role in that kind of miscalculation.”

“They become more self-confident. Well, that's good. People pay to take all sorts of nonsensical self-help courses that will boost your self-esteem and that's a good thing unless testosterone makes you more confident that is inaccurate and you're more likely to barrel into wrong decisions.”