Official guidelines say kids aged five to 18 years should spend no more than two hours a day using screens, and children under two years should not use a screen at all. But in a world dominated by tablets and mobile phones, these limits are proving to be virtually impossible to uphold.

We’ve all felt it at some time in our lives. Poets write about it, singers sing about it – and a whole industry has grown up around finding it, expressing it and maintaining it. But what is love? Where does it reside? What triggers it? And what’s really going on in our minds and bodies when we fall “head over heels”?

“Nice guys finish last” is one of the most widely believed maxims of dating. Fleshed out, the idea goes something like this: heterosexual women might say they want nice characteristics in a partner, but in reality what they want is the challenge that comes with dating a “bad boy”.

"Analysis revealed that girls' mathematics anxiety was not related to the level of their mothers' engagement in STEM careers, nor was it related to gender equality in the countries we studied," says David Geary.

The tragic consequences of bullying have become a regular part of the news cycle. In April, an eighth grade girl in Missouri and a sixth grade boy in Pennsylvania committed suicide. Bullying was an important factor, according to their families.

Even armed with a Ph.D. in developmental psychology, I remember the frightening first moments after bringing my newborn daughter home from the hospital. I wasn’t sure what to do – and not at all confident that I was capable of being the parent she needed me to be.

In the United States, the teen pregnancy rate is higher than in any other western industrialized country, according to the U.S. Centers for Disease Control and Prevention (CDC). At the same time, a growing number of American teens and young adults have been diagnosed with sexually transmitted diseases (STDs).

"The biological clock can get thrown off in these women because they are up so much in the middle of the night," says Katherine Sharkey.

If you are a parent or a teacher, you most probably read stories to young children. Together, you laugh and point at the pictures. You engage them with a few simple questions. And they respond.

Emotions play a critical role in everyday life. The ability to express, regulate, and understand one’s own and others’ emotions – known as emotional competence – is linked to good social skills and to doing better at school.

It will come as no surprise that some new fathers will be anxious or highly stressed. However, most people believe only new mums suffer postnatal depression. This is not the case.

Lots of women look forward to motherhood – getting to know a tiny baby, raising a growing child, developing a relationship with a maturing son or daughter. All over the world, people believe that parenting is the most rewarding part of life.

It is perhaps one of the most controversial debates in sexual function: is there or isn’t there a G-spot? And if there is, how do we find it?

"Masculine traits in humans are not the same as, say, in peacocks where the beautiful tail attracts a mate," says David Puts. "For example, beards make men more dominant looking, scarier, and seemingly more dangerous, but most women prefer clean-shaven men."

True or false: *Couples with great relationships don’t fight. * Most people expect too much from marriage. * All the good men/women are already taken. * Love can heal all wounds. * If my partner were more like me, we’d have a better relationship.

Being a kindergartner today is very different from being a kindergartner 20 years ago. In fact it is more like first grade.

"The ability of children to sustain attention is known as a strong indicator for later success in areas such as language acquisition, problem-solving, and other key cognitive development milestones," says Chen Yu.

When my digital media students are sitting, waiting for class to start and staring at their phones, they are not checking Facebook. They’re not checking Instagram, or Pinterest or Twitter. No, they’re catching up on the news of the day by checking out their friends’ Stories on Snapchat, or...

In both the music and control groups, we gave babies experiences that were social, required their active involvement, and included body movements—these are all characteristics that we know help people learn...

Every single person is different. We all have different backgrounds, views, values and interests. And yet there is one universal feeling that we all experience at every single moment...

A recent survey of pediatricians found they often lacked enough information to accurately diagnose an autism spectrum disorder (ASD) in children. ASD is an important diagnosis not to miss. But it is equally important not to make the diagnosis when it is not truly present.

When you add a smiley face to the end of a message, you may be saying more than you realise. Emoticons, faces formed from punctuation symbols such as :-), and emojis, picture symbols such as

While there is no cure for dementia or Alzheimer’s, studies suggest strong social ties can help ward off the diseases’ advance. The Momentia movement uses strong social ties to ward off the effects of Alzheimer’s and dementia.