Life before smartphones felt simpler. Right? But how smartphones affect our mental health has become an important question, particularly for teenagers.
Teenagers have always watched TV, listened to music, read books and played sports. But they also spent more time hanging out with friends in person, without the constant distraction of notifications, messages and social media.
Today, teenagers can connect with others almost any time. Yet loneliness, anxiety and depression have become growing concerns for young people. Could the technology designed to bring us closer together actually be making us feel less connected?
The answer is complicated. Research suggests that how we use smartphones matters, particularly when screen time replaces activities that support our well-being.
TL;DR: How Smartphones Affect Mental Health
A complicated relationship: Some studies link heavy smartphone use to poorer well-being, but they don’t prove that smartphones directly cause unhappiness.A Visual Reminder of Life Before Smartphones
Less time with friends: Screen time can replace face-to-face socialising and other enjoyable activities.
Unhelpful comparisons: Social media can make people feel inadequate when they compare their lives with others’ carefully selected posts.
Less enjoyment: Phones can distract us from conversations and shared experiences.
Weaker social connections: Spending more time online means less opportunity to build close relationships in person.
Difficulty switching off: Some people struggle to control their smartphone use, even when it interferes with other priorities.
Life Before Smartphones: A Different Way of Connecting
The photos accompanying this article capture a group of teenagers enjoying each other’s company in San Juan, Puerto Rico. I took them in April 2011, before smartphones became ubiquitous.
The teenagers are seen having fun, talking and sharing an ordinary moment. In Puerto Rico, this kind of socialising is known as janguear, a term derived from the English expression “to hang out”.
I find these photographs a useful reminder of something that can easily get lost in discussions about technology: the importance of spending time with other people without necessarily having a particular activity or purpose in mind.
Psychological research consistently links social relationships with well-being. Time spent with friends can provide companionship, emotional support and a sense of belonging. These experiences are not always easy to replicate through a screen.
Of course, life before smartphones was not necessarily happier for everyone. But the photos capture everyday social interactions worth protecting.
How Smartphones Changed Our Social Lives
Generation Z, generally defined as those born between 1997 and 2012, grew up alongside smartphones and social media. For many, digital communication has always been part of everyday life.
However, research published in 2018 by psychologist Jean Twenge and colleagues identified a decline in adolescent psychological well-being beginning around 2012, when smartphones and social media were becoming increasingly widespread.
The researchers also found that adolescents who spent more time socialising in person, playing sports, volunteering and reading tended to report greater happiness. Those who spent more time on screen-based activities tended to report lower levels of well-being.
These findings raise an important question: Could smartphones affect mental health by changing how we spend our time and interact with other people?
Do Smartphones Affect Mental Health?
Smartphones can affect mental health in several ways. They can change how we spend our time, influence how we see ourselves and distract us from activities that matter. Here are six possible explanations.
1. Smartphones Replace Enjoyable Activities
Time spent on screens can mean less time for activities that support happiness, such as playing sports, reading, pursuing hobbies or volunteering.
Psychologists call this the displacement hypothesis. It suggests that screen use can reduce well-being when it replaces activities that would otherwise improve our mood or give us a sense of achievement.
The key question is not simply how much time we spend on our phones, but what we give up to use them.
2. Social Media Encourages Unhelpful Comparisons
Social media exposes us to carefully selected images of other people’s lives. We see their holidays, achievements and social gatherings, but rarely their disappointments or everyday struggles.
Comparing our own lives with these idealised snapshots can leave us feeling inadequate. For teenagers still developing their identities and self-esteem, this can be particularly difficult.
For example, seeing photos of friends at a party we weren’t invited to might trigger feelings of rejection, even when there is no wider reason to feel excluded.
3. Phones Distract Us From the Present
Enjoying an experience often depends on paying attention to it. Yet checking notifications during a meal or looking at messages while talking to a friend divides our attention.
Research suggests that phone use can reduce enjoyment during face-to-face interactions. In one study, people who had their phones available while dining with friends enjoyed the experience less than those without their phones.
The problem is not necessarily the time spent on a phone, but how it interrupts experiences happening right in front of us.
4. Online Contact Does Not Always Relieve Loneliness
Smartphones make it easier to communicate, but frequent contact does not always create a sense of closeness.
Someone might exchange messages with dozens of people yet still feel that nobody really understands them. Meaningful relationships depend on more than the number of interactions we have; they also involve trust, emotional support and a sense of belonging.
Online friendships can provide these things, too. The concern is that digital communication may not always meet our social needs, particularly when it replaces opportunities for deeper interaction.
5. Smartphones Can Disrupt Self-Control
Have you ever picked up your phone to check one message and found yourself scrolling half an hour later?
Notifications, new content and endless feeds make it easy to keep checking our phones, even when we intend to do something else.
Psychologists call the ability to regulate our thoughts and behaviour self-control. When phone use repeatedly interrupts studying, exercise or sleep, it becomes harder to follow through on our intentions.
The problem is not that everyone who uses a smartphone frequently lacks self-control. Rather, some digital habits make it harder to resist distractions and prioritise longer-term goals.
6. Smartphones Can Undermine Our Sense of Control
Smartphones give us access to an endless stream of information, entertainment and social interaction. But how much of what we see and do is our own choice, and how much is shaped by app recommendations, what others post, and what keeps us scrolling?
Our sense of control is the feeling that we can influence our lives and make meaningful choices. Feeling in control is important for well-being. When our digital lives are increasingly shaped by algorithms, notifications and other people’s updates, we may feel less in charge of our attention and experiences.
Being more selective about what we engage with online can help our digital lives reflect our priorities.
Smartphones Affect Mental Health: Correlation Is Not Causation
Although research links certain patterns of smartphone use with poorer well-being, it is important not to jump to conclusions.
If teenagers who use smartphones more frequently report lower happiness, that does not necessarily mean smartphones caused their unhappiness. Teenagers who already feel lonely, anxious or depressed might turn to their phones for comfort or distraction.
The relationship may also work in both directions.
Furthermore, not all screen time is the same. Messaging a close friend, learning a new skill and endlessly comparing yourself with other people are very different activities, even if they all involve a smartphone.
The effects also depend on the individual, the content they encounter and what smartphone use replaces.
This is where the Goldilocks hypothesis becomes relevant. The idea is that moderate screen use can support well-being, whereas very high levels may sometimes interfere with it. Research does not suggest one ideal amount of screen time for everyone, but it does highlight the importance of finding a healthy balance.
How Can We Use Smartphones Without Harming Our Mental Health?
The answer is not necessarily to abandon smartphones. They provide genuine benefits, from maintaining relationships to accessing information and support.
Instead, we can pay closer attention to how technology fits into our everyday lives.
Here are a few practical ways to start:
- Make time for face-to-face contact. Arrange to meet friends instead of relying exclusively on messages.
- Protect enjoyable activities. Make room for exercise, reading, hobbies and time outdoors.
- Reduce unnecessary distractions. Turn off non-essential notifications and put your phone away during meals or conversations.
- Notice how social media makes you feel. If some accounts make you feel inadequate or anxious, consider limiting your exposure.
- Set realistic boundaries. Decide when you want to use your phone and when you want to concentrate on other things.
- Focus on what matters. Use technology to support your goals and relationships, rather than allowing it to dictate how you spend your time.
Parents and carers can help teenagers develop these habits by discussing technology openly, setting reasonable boundaries and modelling balanced smartphone use.
The aim is not simply to reduce screen time. It’s to ensure that technology supports, rather than undermines, the activities and relationships that contribute to well-being.
What Life Before Smartphones Can Teach Us
Looking back at my photos from San Juan, I am reminded that some of life’s most enjoyable moments are ordinary: talking with friends, sharing a joke or simply spending time together.
Smartphones have transformed how we communicate, and many of those changes have been beneficial. But convenience does not always translate into greater happiness. Being able to contact someone at any time does not guarantee that we feel close to them.
Psychological research suggests that our well-being depends partly on how we spend our time, how we relate to others and how much control we have over our behaviour.
Perhaps the lesson is not that life before smartphones was necessarily better. It’s that we should be careful not to lose the everyday experiences that help make life enjoyable.
Explore more of my psychology writing to discover what research can tell us about human behaviour and everyday life.
