Amy Jones (not her real name) is a junior at an Ivy League university. She recently commented that many of her friends spend time and money “glamming up” for shots to post on Snapchat or Instagram.

The point? To get “likes,” of course.

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The power of that one-click word in the lives of co-eds in top-tier colleges, troubled teens, and adolescents of all stripes gains momentum daily. Interestingly, the word isn’t “respect, love or admire” — it is “like.” What a silly, meaningless word. But it is changing the personalities and identities of our teens and young adults everywhere.

The word is trouble for teens and young adults, and here’s why. The great psychologist Jean Piaget posited years ago that there are four stages of cognitive development children experience before they become adults. These stages are: sensorimotor stage (up to age two), preoperational stage (two to seven), concrete operational stage (seven to 11), and the formal operational stage (12 and up).

In this fourth stage, Piaget describes what he calls the adolescent imaginary audience. This is the condition in which the immature mind conceives that everyone outside of that individual watches his every move. You remember this. At age 16, you were embarrassed by acne because you believed the moment you walked into class, all eyes would stare at the lone pimple on your chin. Or you were the high school soccer star who would practice endlessly in her backyard to millions of imaginary cheering fans. It felt at once wonderful but awful.

All eyes are on you because you are so significant — and yet, those same eyes see your greatness (usually imaginary, too) along with your flaws.

Related: Teens and Social Media: Time to Dial It Down

What Piaget didn’t foretell was that his theories were going to become reality. The elusive imaginary adolescent audience would dissolve into a quasi-imaginary audience in the form of Instagram, Snapchat and Twitter — where anyone could see any teen at any time. We could call the audience real, but in fact, it isn’t wholly real.

Yes, real people view pictures and posts, but they do so in a dangerous vacuum. Their responses are dissociated from relationships, feelings or the exchange of truth. Most significantly, they feed the adolescent ego that craves attention from the imaginary audience. And herein lies the real danger. Piaget described a stage that teens move through in order to mature into psychologically healthy adults who can think beyond their own egos and learn compassion, empathy and generosity.

Snapchat and Instagram are nothing but “show-off” zones for the insecure.

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Instagram and the like trap young adults and teens in this fourth stage by reaffirming the ego’s need to be fed hour after hour, day in and day out. That attention is the tiny icon thumb pointing up or pointing down.

As good parents, we need to understand that Piaget was right. Allowing our kids’ fragile egos to be shoveled “likes” or “dislikes” day after day is cruel. It prevents them from becoming fully formed, clear-thinking and happy adults. In fact, do something bold today. Ask yourself why you are on Instagram and social media? The truth is, it makes each of us feel better when we look happier, more successful, prettier etc., than our peers.

Snapchat and Instagram are nothing but “show-off” zones for the insecure. And I’ll admit — I’m insecure. If you and I as mature adults feel better or worse with likes or dislikes, think how much more profoundly a young teen feels with them. Are you willing to post a photo of yourself without your makeup or when you just get out of bed? (I didn’t think so.)

Related: Keeping Kids Safe in an Age of STDs

Shrinking the ego to its healthy size takes years — so help your kids. Their minds and intellects are nothing to fool around with. Either keep them off social media altogether (yes, this can be done, and I have many mothers in my practice who can prove it) — or limit your kids’ (particularly your daughters’) participation in it to 30 minutes a day.

You will be amazed how much better they will feel about life, themselves and yes, how much healthier they will be psychologically.

That’s what Jean Piaget would do.

Dr. Meg Meeker has practiced pediatrics and adolescent medicine for more than 30 years. She is the author of the book “Hero: Being the Strong Father Your Children Need” (Regnery Publishing, 2017), along with a number of digital parenting resources and online courses, including The 12 Principles of Raising Great Kids.