Small nuances in messaging having a large effect

The ingredients were almost insultingly plain:

A credible sender.

A local comparison showing that 80 per cent of nearby practices prescribed fewer antibiotics.

Three actions a doctor could use immediately.

The result was an estimated 73,400 fewer antibiotic items over six months. No glossy launch, no rewards app, no mascot explaining antimicrobial resistance through dance.

Calling this a “small wording change” is misleading. Plenty of tiny copy changes achieve bugger all. The leverage came from assembling the right information around the decision. The comparison removed the comfortable belief that everybody behaved similarly. The practical suggestions prevented concern dissolving into good intentions. The sender made the message difficult to dismiss without making it feel like a threat delivered through the letterbox.

Compare that with: “Antibiotic resistance is important. Please prescribe responsibly.” Every word is true. Every word is also perfectly shaped for a solemn nod followed by lunch.

Precision works when it closes escape routes. Compared with whom? How unusual is my behaviour? What can I do differently at the next decision? A norm without action may shame. Advice without context joins the pile of worthy advice already being ignored. Authority without trust produces resistance.

The letter was small in the way a key is small: compact, specific and useless unless somebody has understood the lock.

Behavioural principles

Behavioural ideas at play in this post

Short, plain-English explanations of the principles behind this post, with links to related books and examples in the archive.