Night Owls More Prone to Smartphone Addiction and Impulsivity

The Night Owl’s Uncomfortable Truth

You know that feeling at 2 a.m. when you tell yourself you’ll just check Instagram one more time, and then suddenly it’s 3:30 a.m. and your thumb is still scrolling? If you’re a night owl, that feeling isn’t just a bad habit. It might be wired into your biology in ways that make you more vulnerable to smartphone addiction, impulsivity, and attention problems.

A 2022 study published in Alpha Psychiatry by researchers B. Yılbaş and Pınar Günel Karadeniz put this to the test. They surveyed 255 university students in Turkey, measuring their chronotypes (whether they’re morning larks, evening owls, or somewhere in between) and then testing them for impulsivity, ADHD symptoms, and addiction to smartphones, social media, and the internet. The results were stark: evening types scored significantly higher on every single measure of problematic behavior (Yılbaş & Karadeniz, 2022).

This isn’t a story about willpower. It’s a story about how your internal clock shapes your relationship with the glowing rectangle in your pocket.

Why Your Chronotype Matters More Than You Think

The three tribes of human sleep

Your chronotype is your natural preference for when to sleep and when to be awake. Morning types (larks) wake early, peak in the morning, and fade by evening. Evening types (owls) hit their stride late, struggle with mornings, and feel most alert at night. Then there’s the intermediate type, the vast middle ground where most people land.

In Yılbaş and Karadeniz’s sample, the intermediate type was the most common (157 students), while evening types were the rarest (44 students). Morning types fell in between (54 students). That distribution is normal. What wasn’t normal was what happened when the researchers compared these groups on addiction scales.

The numbers that should worry you

The evening types didn’t just score higher on some measures. They scored higher on every measure. The researchers administered six different validated scales: the Adult ADHD Self Report Scale, the Morningness Eveningness Questionnaire (to confirm chronotype), the Barratt Impulsiveness Scale, Young’s Internet Addiction Scale, the Social Media Addiction Scale, and the Smartphone Addiction Scale (Yılbaş & Karadeniz, 2022). On every single one, evening types had the highest average scores.

Consider that carefully. This wasn’t a study that found a correlation between being a night owl and, say, drinking more coffee. It found that night owls are more impulsive, more distractible, and more addicted to their devices than morning larks or intermediate types. And the differences weren’t subtle. The authors reported statistically significant differences in time spent daily on smartphones and the internet (P = .001 and P < .001, respectively) (Yılbaş & Karadeniz, 2022).

The Impulsivity Trap

What impulsivity actually looks like

The Barratt Impulsiveness Scale measures three kinds of impulsivity: attentional (making decisions without thinking), motor (acting without forethought), and nonplanning (lack of future orientation). Evening types scored higher on all three (Yılbaş & Karadeniz, 2022). That means they’re more likely to switch tasks mid sentence, make snap decisions they regret, and fail to plan ahead for consequences.

Here’s the uncomfortable part: smartphones are designed to exploit impulsivity. Every notification is a little impulse trigger. Every autoplay video is a trap for the nonplanning mind. If you’re already prone to acting without thinking, the phone in your pocket is not a tool. It’s a force multiplier for your worst tendencies.

The ADHD connection

The study also found that evening types scored higher on the Adult ADHD Self Report Scale (Yılbaş & Karadeniz, 2022). That doesn’t mean night owls have ADHD. It means they report more symptoms of inattention and hyperactivity. The relationship between chronotype and ADHD is bidirectional. People with ADHD tend to be evening types, and being an evening type might worsen ADHD symptoms through sleep deprivation and circadian misalignment.

The authors speculated that the impulsivity and attention problems observed in evening types may predispose them to develop addiction to smartphones, internet, and social media (Yılbaş & Karadeniz, 2022). In other words, the night owl brain might be wired for vulnerability before the phone ever enters the picture.

The Addiction Feedback Loop

How your phone hijacks your night

Here’s the cruel irony. Evening types are already prone to staying up late. Smartphones make that worse. The blue light from screens suppresses melatonin, making it harder to fall asleep. The endless content feed keeps you engaged. And the social rewards (likes, messages, notifications) hit the dopamine system hardest when you’re already tired and impulsive.

The study found that evening types spent more time daily on both smartphones and the internet compared to morning and intermediate types (Yılbaş & Karadeniz, 2022). That’s not surprising. What’s important is the direction of causality. Does being a night owl cause more phone use? Or does more phone use cause you to become a night owl? The answer is probably both, in a vicious cycle that tightens the more you scroll.

Social media addiction is real

The researchers measured social media addiction separately from general internet addiction. Evening types scored higher on both (Yılbaş & Karadeniz, 2022). Social media is particularly dangerous for night owls because it never sleeps. At 3 a.m., there’s no one to call. But there’s always someone posting. The platform rewards late night engagement with more content, more notifications, and more opportunities for impulsive responses.

This is not a moral failing. It’s a design feature of both your biology and the technology.

What the Study Actually Found (and Didn’t Find)

The methodology was solid

This was a cross sectional study, meaning the researchers measured everything at one point in time. They used validated, widely accepted scales. The sample was 255 university students from medical and health sciences faculties. Face to face interviews ensured data quality. The authors controlled for gender and found no significant differences between male and female students on any scale (Yılbaş & Karadeniz, 2022).

What it does not prove

This study does not prove that being a night owl causes smartphone addiction. It shows a strong correlation. The causal direction could go either way, or a third factor (like genetics or sleep deprivation) could drive both. The authors were careful to note that their findings are associations, not causations (Yılbaş & Karadeniz, 2022).

It also does not mean every night owl is doomed to addiction. The study found higher averages, not universal outcomes. Many evening types use their phones responsibly. The finding is about risk, not destiny.

And the sample was limited: university students in Turkey, mostly from health sciences. The results may not generalize to older adults, different cultures, or people with different educational backgrounds.

The Brain Chemistry Behind the Clock

Why evening types might be wired differently

The circadian system and the dopamine system are deeply intertwined. The suprachiasmatic nucleus (your brain’s master clock) communicates with reward centers like the ventral tegmental area and nucleus accumbens. When your circadian rhythm is shifted late, your dopamine system may become more reactive to rewards and less sensitive to consequences.

This is the neurobiological basis for why evening types show higher impulsivity. It’s not that they lack discipline. It’s that their brains are operating on a schedule that makes impulse control harder, especially at night when their cognitive resources are already depleted by the day’s demands.

The sleep deprivation multiplier

Evening types who live in a morning world (which is most of us, given school and work schedules) suffer from chronic social jetlag. They’re forced to wake early for classes or jobs, but they can’t fall asleep early because their internal clock says it’s still daytime. The result is chronic sleep deprivation.

Sleep deprivation impairs prefrontal cortex function. That’s the part of your brain responsible for inhibition, planning, and resisting temptation. So the night owl who sleeps poorly is essentially running their addiction prone brain with the brakes removed.

What This Actually Means

Here’s the practical takeaway from Yılbaş and Karadeniz’s research, stripped of academic caution and translated into what you can do with it.

• ▸If you are a night owl, your phone is not neutral for you. It is a higher risk device than it is for morning people. Treat it that way. Consider a phone lockbox at night, or a dedicated “no phone after 10 p.m.” rule. This is not about being virtuous. It is about recognizing that your biology makes you more vulnerable to the device’s design.

• ▸Impulsivity is not character. It is a measurable trait that varies across chronotypes. If you score high on impulsivity, don’t blame yourself for every late night scroll session. Instead, change your environment. Remove the triggers. Turn off notifications. Delete the apps that feed your impulsive thumb.

• ▸Social media after midnight is a bad bet for everyone, but especially for night owls. The combination of late hour, low inhibition, and high reward content is a perfect storm. The study found that evening types scored higher on social media addiction specifically (Yılbaş & Karadeniz, 2022). If you are an owl, treat late night social media like alcohol after midnight: something that amplifies your worst tendencies.

• ▸Sleep hygiene is not just about getting rest. It is about protecting your brain from addiction vulnerability. The study suggests that the impulsivity and attention problems seen in evening types may predispose them to addiction (Yılbaş & Karadeniz, 2022). If you can shift your sleep schedule even a little earlier, you may reduce that vulnerability. Light therapy in the morning, avoiding screens before bed, and consistent wake times can help nudge your chronotype toward intermediate.

• ▸This is not a life sentence. Chronotypes are not fixed. They have a genetic component, but they shift with age, environment, and behavior. Young adults tend to be evening types; older adults become morning types. If you are a night owl struggling with phone addiction, you are not broken. You are running on a different clock in a world that only rewards early risers. The solution is not to fight your biology but to work around it. Set your phone to grayscale at night. Use app blockers. Schedule your most important work for your peak hours, even if those hours are at 2 p.m. instead of 8 a.m.

The researchers put it plainly: “Greater impulsivity and attention problems as observed in the evening types may be predisposing these individuals to develop addiction to smartphone, internet, and social media” (Yılbaş & Karadeniz, 2022). That is not a judgment. It is a warning. And like most good warnings, it comes with an invitation to act.