Encouraging electricity savings in a university residential hall through a combination of feedback, visual prompts, and incentives.

Researchers moved into a university dorm. They wanted students to use less electricity.

Each day they posted the hall’s kilowatt score on a big chart. They added friendly signs by light switches and handed out small prizes for low-use days.

A second dorm got no posters or prizes. The team compared the two buildings for several weeks.

The feedback hall trimmed daytime power use by about 16%. Night use dropped 11%.

The control hall stayed flat. Students kept the lights off longer when points and candy were at stake.

Davol et al. (1977) got a 35% cut in family homes with just door-side notes and daily cost charts. The dorm study copied the same tools but added token prizes and reached young adults living on campus, not parents in houses.

Annable et al. (1979) showed that teaching people to read their own meter gives a 7% saving that lasts two months. The dorm package beat that number, likely because the public chart and rewards kept the behavior in view every day.

Pandey et al. (2016) later swapped paper posters for automatic e-mails across campus buildings. They kept the university setting but lost the face-to-face cheers; the abstract never claimed clear savings, hinting that live feedback plus prizes still packs more punch than an inbox reminder.

You can shrink electricity use in any shared space with three cheap parts: a daily scoreboard, a visual prompt at the switch, and a tiny reward. Try it in group homes, clinics, or staff rooms. Post the kilowatts where everyone walks by, hand out stickers or snacks for winning days, and watch the meter fall.