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If the vast majority of battles with your brother or boyfriend boil down to their inability to admit they’re wrong, you’re not alone.

And while stubbornness and inflexibility are far from specific to one gender, a recent study has revealed that the presence of testosterone has a lot to do with an individual’s belief they are right… even when they are wrong.

According to professor of Behavioural Economics at Caltech, Colin Camerer, high levels of testosterone can prevent an individual from questioning themselves, and can cause a spike in confidence levels.

Dividing a group of individuals in half, scientists administered testosterone to one while leaving the other without.

Those who were high in testosterone answered 20 per cent fewer questions correctly than the other group, and ultimately struggled to reach the right answer.

"What we found was the testosterone group was quicker to make snap judgments on brain teasers where your initial guess is usually wrong,” he explained.

“The testosterone is either inhibiting the process of mentally checking your work or increasing the intuitive feeling that 'I'm definitely right.”

“If you’re more confident, you’ll feel like you’re right and will not have enough self-doubt to correct mistake,” Professor Camerer added.


Women everywhere roll their eyes when their man says, “I think I’m coming down with something”.

While ladies of the world have the ability to function when sick, men often have to be waited on hand and foot as they battle the infamous ‘man flu’.

However, before you breathe a sigh of frustration, there’s something you need to know: ‘man flu’ may actually be a real thing. Dun, dun, dun.

According to new research, males may actually suffer more when they are struck down with flu. This is due to their high levels of testosterone, which weaken their immune system.

On the upside though, it was found that a woman’s body is better able to fight the awful virus.

So the next time your man feels the sniffles coming on, you may want to hold your tongue and just hand him a tissue.