Deja vu is pretty weird. We've almost all experienced it at some time. But what actually is deja vu?
Psychology
Welsh victims who were infected with HIV and hepatitis C gain access to psychological support.
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Stav Dimitropoulos
Technology of Business reporter
There are many mental health apps on the market, but how much help are they?
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Dominic Casciani
Home affairs correspondent
A top psychologist says there is probably no scheme that can "cure" or "de-programme" a terror offender.
Read moreHow to tell if you have impostor syndrome
Do you sometimes feel you're not quite good enough? If so, you may have impostor syndrome. Here's how to tell if you have it - and what to do.
When it comes to Black Friday shopping deals, do you know when you're being manipulated?
Sean Coughlan
Family and education correspondent
They might be shameless attention-seekers but narcissists are also likely to be happier people.
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Bad news for Donald Trump - anything over three seconds can spell disaster, say scientists.
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A report by psychologists says seeing obesity as a moral failing only makes things worse.
Read moreVaginismus is a psychosexual disorder that can destroy people's lives - so why does no one talk about it?