Technology and Adolescents

11 September 2018

Technology – it’s a topic we talk about a lot and is highly relevant to both parents and educators. Increasingly, we read thought provoking articles focusing on the impact that technology addiction is having on distracting the adolescent brain, deteriorating mental health, and increasing social isolation. At St Andrew’s College we think it important that we see the whole picture.

Is the digital world bad for the teenage brain?

Neurobiologist, Dr John Medina specialises on teen brain development. The question, “Is the digital world bad for the teenage brain?” is one that predominates his lectures. Medina stresses the answer is not straight forward. Firstly, what is meant by the digital world? Laptop? iPhone? Snapchat? Xbox? Instagram? And secondly, what aspect of brain development are we interested in? Attention spans? Social Interactions? Mental health? Creativity?

Technology and adolescents

Like any other question psychologists can think to ask about human behaviour, screen use and its association with psychological well-being varies based on a multitude of contextual and personal variables.

Says Medina, We don’t have the answers to these questions and most of these variables haven’t been investigated in carefully designed randomised trials. We need more research.

One thing we know for sure – there has been exponential growth in adolescents use of technology. Research from the Pew Research Centre has tracked changes in adolescent internet use. Smartphones are ubiquitous. In 2018, 95% of teens (aged 13–17) have access to a smartphone. And 72% of these teens are active on Instagram and Snapchat. A growing share of teens now describe their internet usage as online on a near constant basis. Research has found that adolescents are spending an average of 8.5 hours per day on their screens.

Technology and adolescents

There is no doubt that we are witnessing a digital revolution. And this revolution is happening faster than any other innovation that has occurred through human history.

At St Andrew’s we see it as important to follow research as it emerges. We need to understand the advantages and disadvantages of technology, so our students can harness the benefits and mitigate the risks associated with a rapidly changing world.

Technology and adolescents

So? What are the advantages with increased technology?

  • Technology has provided us with access to information like we could have never dreamt. As a lover of learning, I am so grateful to live in these times. Historian, Noah Yuval Harari acknowledges that even if you live in some provincial Mexican town and you have a smartphone, you can spend many lifetimes reading Wikipedia, watching TED talks, and taking free online courses. Educators across the world are benefiting from increased access to a plethora of stimulating and interactive resources that enrich teaching and learning. In my last lesson, geographers were able to compare development across the world using this incredible website:

Technology and adolescents

Increased access to information provides opportunities for more personalised teaching and learning. Students can extend their learning by researching what they are personally interested in and motivated by. Programmes like Education Perfect allow students to learn and progress at their own pace, and seek timely feedback.

  • Technological advancements have created tools which can enhance thinking skills like creativity, collaboration and innovation. New York Times columnist, Clive Thompson believes the use of digital devices and social networking, helps us facilitate collaborative creativity and develop a new awareness of what’s happening in the world, while taking away the need to perform simple memory tasks.

Interestingly, there is little, to no conclusive evidence analysing the causal relationship between technology and educational achievement. In 2011 Tamim and Bernard reflected on 40 years of research by conducting a meta-analysis on 1,055 research studies related to the impact computer technology has on student achievement. The results of this meta-analysis were inconclusive due to the wide array of variables that can impact the findings.

The researchers' conclusion reflects St Andrew’s College strong perspective; technology should always serve the pedagogical approaches and teacher practices that we know impact student achievement (teachers matter). Technology is a wonderful tool, but we know that it is teacher effectiveness that has the most powerful impact on effect sizes and student achievement.

Technology and adolescents

What are the disadvantages?

Jean Twenge is a professor of psychology who has specialised in analysing the generational patterns of adolescents. Her article Have smartphones destroyed a generation? was one of the most read Atlantic articles in 2018. In it, she indicates that the arrival of the smartphone has radically changed every aspect of teenagers’ lives, from the nature of their social interactions to their mental health.

an article on smartphones and have they destroyed a generation?
  • We know that interacting with people face to face is one of the most important factors for cultivating well-being. There is a strong correlation between social connectedness, extraversion and subjective well-being. Twenge’s research on iGen indicates that teenagers are spending less time interacting with their friends in person. This could mean the choice to watch a movie online rather than going to the cinema with friends. She believes that technology induced social isolation is leading to an exponential growth in symptoms related to depression and anxiety.

  • The adolescent brain is sensitive to the effects of a neurotransmitter called dopamine. Although, adolescents have a lower baseline of dopamine, they have a more intense release of this ‘happy’ chemical. This hopped up reward system can increase addictive behaviours associated with gaming, social media and pornography.

  • There is also evidence to suggest that teens are sleeping less, and teens who spend more time online are more likely not to be getting enough sleep. The accepted required amount of sleep for teens is nine hours per night. Research by the National Sleep Foundation concludes that 56% of teens are sleeping less than seven hours, and that 75% are sleeping with their devices in their bedrooms. Not sleeping enough is a major risk factor for depression.

  • Technology use is impacting on attention and focus. Research shows that our cognitive control abilities like sustaining attention and selecting a focus are impacted by media multitasking (and our minds and brains are not designed for heavy-duty multitasking). Dr Larry Rosen is an international expert in the ‘psychology of technology’. His research indicates that students struggle to focus for any more than 3 minutes at a time before task switching. Task switching significantly impacts on the time it takes to complete or conceptualise a task. Multitasking can significantly impact on the perseverance and patience that is required for in-depth thinking.

Technology and adolescents
  • Social media and texting has had a major impact on the expectations we have around ourselves and others. Emails, social media and texting come with an expectation that a communication must be addressed immediately. This issue can impact on increased anxiety and certainly exacerbates our distracted mind.

  • In 2015, academics at Victoria University in Wellington conducted research investigating the impact of the internet on reading behaviour. They found that when participants read offline, they performed better in concentration, comprehension, absorption, and recall.  Interestingly, the lead researcher Val Hooper concluded her study with a reminder that students need to learn to read and write digitally. To prepare for a digital world they must be able to effectively interpret and retain information they read online.

  • Research suggests that students will have improved retention of their notes if they are handwritten. Handwriting is also important for our fine motor skills. This is why St Andrew’s is committed to purchasing Microsoft devices that enable students to write, draw and create.

Technoloy and adolescents

There is no question that technology will continue to accelerate faster than our ability to anticipate and deal with the consequences. St Andrew’s are committed to staying up to date with the discussion and research. My next blog post will focus on strategies at school and home that have been proven to be effective for managing technology effectively.


Cavanagh, S.R. “No, Smartphones are not destroying a generation.” in Psychology Today online (August, 2017)

Gazzaley, A., & Rosen, L. (2016). The Distracted Mind: ancient brains in a high-tech world. The MIT Press, London, England.

Harari, Y. N. (2018). 21 Lessons for the 21st Century. Vintage Publishing. London, U.K.

Hooper V. A. & Herath D. C., (2014). ‘Is Google making us stupid? The impact of the internet on reading behaviour’, Proceedings of 27th Bled eConference, edited by Andreja Pucihar, Christer Carlsson, Roger Bons, Roger Clarke, Mirjana Kljajic Bortnar (Slovenia, University of Maribor), pp. 51-62.

Karadaras, N. (2016). Glow Kids: How Screen Addiction is Hijacking Our Kids- and How to Break the Trance. St Martin’s Press, London.

Tamim, R.M., Bernard, R.M., Borokhovski, E., Abrami, P.C. & Schmid, R.F. (2011). What Forty Years of Research Says about the Impact of Technology on Learning: A Second-Order Meta-Analysis and Validation Study. Review of Educational Research, 81(1), 4-28.

Livingstone, S. (2018) iGen: why today’s super-connected kids are growing up less rebellious, more tolerant, less happy – and completely unprepared for adulthood, Journal of Children and Media, 12:1, 118-123

Medina, J. (2018) Attack of the Teenage Brain! Understanding and supporting the weird and wonderful teenage learner. ASCD. Alexandria.

Thompson, C. (2013). Smarter than you think: How Tech is changing our minds for the better. The Penguin Press, New York.

Twenge, J. “Have Smartphones Destroyed a Generation?” in The Atlantic Magazine (Online, 2017)

Related Posts