Hi
I don’t usually forward research papers. But something landed on my desk this week that I think deserves your attention.
The findings
The British Institute for Cognitive and Behavioural Sciences (BICBS) published its annual review last Thursday. It makes uncomfortable reading for anyone who uses AI tools regularly — which, if you’re running a business in 2026, almost certainly means you.
The
study, which tracked 4,200 professionals across a range of sectors over 18 months, found that individuals who regularly used AI to draft written communications showed a measurable decline in several key cognitive functions, including critical reasoning, written articulation, and the ability to construct an original argument without prompting.
The lead researcher, Professor Diane Hartwell,
described the findings as “consistent and concerning across all age groups, but most pronounced in the under-35 cohort.”
The headline figure is hard to ignore. Participants who used AI daily for written output showed a 23% reduction in what the report terms “independent cognitive production” — the ability to form and express a coherent idea from scratch, without technological
assistance.
The report notes, with some understatement, that this has implications for education, professional life, and commerce.
What’s being proposed
BICBS has submitted its findings to the Department for
Science, Innovation and Technology and is understood to be in early discussions with ministers. A formal response is expected before the summer recess.
Among the measures under active consideration:
- A ban on AI writing tools for under-25s, on the grounds that habitual use during formative
cognitive development may cause effects that are not fully reversible. The proposal is modelled loosely on existing restrictions around social media algorithms and is backed by three royal colleges.
- Mandatory “cognitive rest periods” for professionals in regulated industries, during which AI tools must be switched off and correspondence produced entirely by hand. The suggested minimum is one day per
fortnight. BICBS has proposed calling these Digital Abstinence Days, though it is not clear who approved that name.
- A requirement for employers to assess whether staff can still write a coherent paragraph unaided before renewing contracts. The suggested test — provisionally titled the Unassisted Professional Competence Assessment (UPCA) — would take 20 minutes and involve writing a short business letter
and a brief summary of a problem and its solution. With a pen.
- Compulsory labelling of AI-generated content with a cognitive health warning, along the lines of those used on tobacco products. The draft wording submitted to ministers reads: “Regular use of AI writing tools may impair your ability to think independently. Use sparingly.”
- A proposed national awareness campaign — currently referred to internally as Think For Yourself — which would run across broadcast and digital media and encourage professionals to spend at least 30 minutes each day writing something without AI assistance. The campaign budget has been set at £4.2 million. The tender was awarded last month. The winning pitch was written by an AI.
Where this leaves us
I’ll be honest with you. I use AI tools and I find them genuinely useful. But the BICBS findings have made me think harder about how I use them — and whether the convenience is quietly costing me something I’m not fully aware of losing.
The best version
of this technology, in my view, is one that sharpens your thinking rather than replacing it. The risk is that most people are drifting towards the latter without noticing.
Whether or not the government acts, that’s worth paying attention to.
Noel Guilford
P.S. BICBS, Professor Hartwell, and the UPCA are entirely fictional. The
underlying question is not.
