The short version
- Jared Cooney Horvath contends that heavy screen use in classrooms correlates with declining IQ scores and academic performance among Western students.
- Critics argue that while excessive device usage is harmful, moderate engagement can yield positive results and that correlation does not prove causation.
- The debate highlights a growing tension between the massive edtech industry and educators seeking to preserve deep, transferable knowledge acquisition.
A leading neuroscientist is raising alarms about the pervasive role of digital tools in modern classrooms, arguing that educational technology is actively undermining how children learn and develop. Jared Cooney Horvath, a former teacher and author of The Digital Delusion, posits that the integration of screens into academic settings has reversed nearly two centuries of steady generational progress in health, happiness, and education levels. He suggests that current cohorts of students are less cognitively capable than previous generations were at the same age, marking a significant departure from historical trends.
Horvath points to data indicating that IQ scores across Western nations began to decline around the year 2000, even as time spent in school increased. He attributes this shift to the meteoric rise of educational technology, which has become deeply embedded in schooling systems. In the United States alone, he describes the sector as a four-hundred-billion-dollar industry that influences every aspect of education. The UK market also generates substantial revenue, with recent reports citing an annual turnover of approximately 6.5 billion pounds for educational technology services.
The acceleration of this trend is closely linked to the pandemic era. Horvath notes that while schools initially adopted digital tools as a necessary stopgap during lockdowns, most institutions failed to revert to previous methods once restrictions lifted. Instead, they maintained high levels of digital integration. In the US, eighty-eight percent of school districts now provide one-to-one computers for students. This permanent shift has occurred despite Horvath’s assertion that technology is not an effective tool for fostering deep, transferable knowledge.
Supporting his argument, Horvath cites data from the Programme for International Student Assessment, which tracks academic performance among fifteen-year-olds globally. The assessment includes questions about daily device usage during school hours. According to Horvath’s analysis, there is a clear negative correlation between screen time and test scores. Students who used computers for more than six hours per day scored significantly lower on average than their peers who did not use devices at all.
However, other experts in the field urge caution regarding these conclusions. Rose Luckin, an emerita professor of learner-centred design at University College London, acknowledges that much educational technology was marketed based on promises rather than rigorous evidence. Yet she disputes the notion that all such technology is problematic. Her analysis of similar data suggests that moderate device use is actually associated with better academic results than no use at all, with only the heaviest daily usage correlating with poor outcomes.
Daisy Christodoulou, director of education at a UK-based educational technology startup, echoes this nuanced view. She agrees that society has been somewhat complacent about the impact of new technologies but remains more optimistic about their potential, particularly in upper secondary education. While she notes that screens have not impacted English classrooms as severely as those in the US, she believes the issue warrants serious consideration rather than dismissal.
Dylan Wiliam, an emeritus professor of educational assessment at UCL, emphasizes the limitations of current research. He argues that existing correlational studies cannot support definitive causal claims about technology harming student achievement. Furthermore, he points to well-designed studies demonstrating that technology can have a positive impact on learning in certain contexts. Consequently, the question of whether educational technology negatively affects learning does not admit a simple yes or no answer.
The ongoing debate reflects a broader corrective movement within education, as stakeholders realize the need to scrutinize the tools being introduced into classrooms. While Horvath calls for a significant reduction in screen time to protect cognitive development, other experts advocate for a more balanced approach that distinguishes between harmful overuse and beneficial integration. The path forward likely involves careful evaluation of when and how technology aids learning, rather than a blanket rejection or acceptance of digital tools.
As the educational landscape continues to evolve, the tension between the commercial interests of the edtech industry and the pedagogical goals of educators remains unresolved. Horvath’s warnings serve as a stark reminder of the potential costs of unchecked technological adoption in schools. Meanwhile, critics insist that evidence-based practices must guide policy decisions, ensuring that technology serves as a supplement to, rather than a replacement for, effective teaching methods.
This discourse is likely to intensify as new technologies, including artificial intelligence, become more prevalent in educational settings. The challenge for policymakers and educators will be to navigate these innovations while safeguarding the cognitive development of students. Until more robust causal evidence emerges, the debate over the role of screens in learning will remain complex and contested.
Sources behind this briefing
Go to the original reporting
- The Guardian World↗‘Our children are less cognitively capable,’ says neuroscientist who wants to cut screen use in schools
