Mass media campaign with loudspeaker rickshaw, Bangladesh. Photo: Eawag
Evidenced-based methods are more cost effective than traditional NGO awareness raising approaches to ensure sustained behaviour change in the WASH sector, says environmental psychologist Prof. Hans-Joachim Mosler.
Two of his presentations on evidence-based behaviour change are now available online. An accompanying guideline for behaviour change  was published in June 2012.
Mosler begins his first presentation with examples of failed sanitation and water projects. What they have in common is that they focus on hardware and neglect behaviour change. In one striking study, the construction of new school latrines actually increased health risks among girls because hygiene behaviour did not improve .