Does Source Credibility Matter for Point-of-Decision Prompts? Evidence from a Field Experiment to Increase Stair Use in University Residence Halls

To encourage using stairs instead lifts, the experiment tests the sources and components of the message.



  • Online Pilot (N=100) to access the level of credibility
  • Statistically significant difference between high and low credibility sources

Health Message

  • Climbing 1 Step of Stairs Extends Your lifespan by 4 Seconds!
    (Descending 1 Step of Stairs Extends Your lifespan by 1.3 Seconds!)
  • Selected by Focus Group, and most likely to be affected by source credibility

Dependent Variable

Design - Reversal (A-B-A) Design with Comparison Group

Preliminary findings