The Teenage Personality Dip: Why Your Teen Suddenly Seems So Different

Does your teenager no longer make sense to you?

Has their personality morphed in ways you didn’t count on and don’t understand?

Have they become less organised, less cooperative, and more emotionally volatile?

I have news:

Research suggests this is not only common – it’s a normal part of adolescent development.

Researchers in Norway recently followed hundreds of children from ages 10 to 16, tracking changes in personality over time. What they describe in their data is something psychologists call the “adolescent personality dip.”

How Personality Works

Psychologists typically describe personality using five major traits:

openness to new experiences
conscientiousness
extraversion
agreeableness
emotional stability

You can remember these traits using the acronym OCEAN. This model is called “The Big 5”.

The first graph from the study (shared below) looks at how personality traits shift as kids get older, and whether boys and girls differ. (Girls are the dotted line, boys are the solid line.) The left panels show the actual average scores for each sex between ages 10 and 16. The right panels show the projected trajectories – where those traits are heading over time. To keep things simple, just stick with the left.

As you can see, conscientiousness drops in both sexes from around age 12 – but boys score lower than girls at every point along the way. Agreeableness follows a similar pattern, declining across the same period, with girls consistently more agreeable than boys throughout.

Neuroticism is where things get interesting. Girls show a marked increase from age 12 onward; boys don’t. Emotional instability is a common complaint from parents of teen girls and this graph demonstrates this reality. That neuroticism gap widens significantly through mid-adolescence – though like many sex differences that emerge around puberty, it tends to narrow again in adulthood.

The researchers went deeper into the personality changes but for our purposes here, this provides a clear enough overview. (You can see more by clicking on the link to the article above.)

For many parents, the emotional changes that hit with puberty are the hardest part of raising teens. Small issues can trigger disproportionately enormous reactions. Friendships become more complicated. School pressure intensifies. Peer approval feels critically important.

Adolescence is a period of enormous neurological, emotional, hormonal, and social change. Teenagers are trying to figure out who they are, gain independence, navigate friendships and social pressure, manage growing academic demands, and cope with rapidly changing emotions

At the same time, the parts of the brain responsible for emotional regulation and impulse control are still developing.

That’s why teens can sometimes seem mature and insightful one moment — and deeply irrational the next.

What Helps Parents Most?

Understanding that much of teenage behaviour is developmentally normal can hopefully impact the way we respond to those big emotions and stubborn moments.

Instead of asking, “Why are they being so difficult?” we can begin asking, “What might they be struggling with underneath this behaviour?” Or we can detach ourselves from their behaviour a little, recognising that this is a “them” thing, not an “us” thing, and not take everything so personally. They’ll grow through it. (This doesn’t mean we stop caring. It just means we remove our ego from the interactions and allow them to be who they are right now… with our love and support ready to go when they seek it.)

Here are three things that can help.

1. Take Their Perspective Seriously

Teen problems may not seem big to adults, but they feel enormous to teens. When parents dismiss emotions or minimise concerns, teenagers often shut down. But when we acknowledge their feelings – even if we don’t agree with their behaviour – we help them feel understood.

Simple phrases like “That sounds really hard.” or “I can see why you’re upset.” or “I’d probably feel overwhelmed too.” can instantly reduce tension. Even a simple, “Looks like today’s been pretty tough” can soften their heart (and yours), and stabilise a spiraling teen.

2. Reduce Control Battles

Teenagers are wired to seek greater independence. The more forcefully parents try to control every decision, the more resistance they often encounter.

That doesn’t mean removing boundaries. It means explaining expectations and inviting cooperation wherever possible.

Instead of: “Because I said so.” try: “Here’s why this matters.” or “Let’s work through this together.”

Teenagers are far more likely to cooperate when they feel respected and involved. If they can identify the value of a request, they’re more likely to “buy the why” and endorse your preferred action.

3. Stay Patient

This may be the hardest parenting task of all. Teen emotions can be exhausting. Their inconsistency can be frustrating. Their reactions can feel deeply personal.

But most adolescents are not intentionally trying to make life difficult. They are learning – imperfectly – how to manage increasingly complex emotions, relationships, and responsibilities.

And importantly, this phase does pass.

The research is actually very hopeful. Across adulthood, people generally become more emotionally stable, more conscientious, and more agreeable. In other words, the personality dip is usually temporary.

The Bigger Picture

Parents often worry that difficult teenage behaviour reflects permanent character flaws.

But adolescence is less about who your child is now, and more about who they are becoming.

The teenager who seems moody, emotional, or resistant today is still developing the emotional skills and maturity they will carry into adulthood. What were you like? And how have you improved? If things have become better for you, rest assured that they’ll also become better for your currently hard-to-manage teen. Your calm presence matters enormously during this season.

Teenagers may push us away at times, but they still need connection, empathy, patience, and guidance – perhaps more than ever.

And while these years can be challenging, these are the years where we strengthen trust, deepen relationships, and help young people grow into capable, resilient adults.

ANZAC Day