How messages while drunk can have disproportionate effect

A group of Canadian psychologists led by Tara MacDonald recently went into a series of bars and asked the patrons to read a short vignette. They were to imagine that they had met an attractive person at a bar, walked him or her home, and ended up in bed – only to discover that neither of them had a condom. The subjects were then asked to respond on a scale of 1 (very unlikely) to 9 (very likely) to the proposition: “If I were in this situation, I would have sex.” You’d think that the subjects who had been drinking heavily would be more likely to say they would have sex – and that’s exactly what happened. The drunk people came in at 5.36, on average, on the 9-point scale. The sober people came in at 3.91. The drinkers couldn’t sort through the long-term consequences of unprotected sex. But then MacDonald went back to the bars and stamped the hands of some of the patrons with the phrase “AIDS kills.” Drinkers with the hand stamp were slightly less likely than the sober people to want to have sex in that situation: they couldn’t sort through the rationalization necessary to set aside the risk of AIDS. Where the norms and standards are clear and obvious, the drinker can become more rule-bound than his sober counterpart.

Alcohol did something subtler than turn sensible people into reckless idiots. It narrowed the field of attention. With the risk outside that field, drinkers leaned towards temptation. Put the danger on their hand and narrow attention could favour caution instead. Limited attention becomes a loudhailer for whatever manages to remain visible.

Most serious messages meet us in similarly shabby mental weather: tired, rushed, frightened, excited, three drinks in or one deadline behind. Yet companies write for a calm philosopher sitting upright beneath a reading lamp. The fraud warning lives in yesterday’s email. The true subscription cost hides behind the confirm button. The equipment warning gets a tasteful paragraph on page 47, miles from the control that can remove a finger.

Then everyone acts surprised when the communication “failed to land”. It landed perfectly. It landed nowhere near the decision. Put the essential fact where the hand moves. Strip away competing language. Insert a pause before actions with serious or irreversible consequences. A midnight message may need a delay more than tomorrow’s lecture on judgement.

Companies already know when customers are vulnerable—urgent transfers, angry cancellations, late-night spending. Designs that exploit that state deserve a less flattering name than conversion optimisation. It is grubby engineering. Good communication survives the mind people actually have in the moment. Compliance documents can keep their imaginary philosopher.