“…Potential reinforcers Drinking treated water, or treating water for drinking -Better health (e.g. 'fewer stomach problems) (Rainey and Harding 2006) -Improved taste, smell and appearance of treated water, compared to untreated water (Ngai, Shrestha, Dangol, Maharjan, & Murcott, 2007) -Approval and admiration by others for using water treatment technology (Trinies et al, 2011), including by researchers (Wood, Foster, & Kols, 2012) -Social interaction when collecting the water from safe source (Mosler, Blöchliger, & Inauen, 2010) -Avoiding criticism ('social pressure') (Graf et al, 2008) Using a toilet or latrine -Convenience, cleanliness and good health (Jenkins & Scott, 2007) -More chances to find a female partner and marry (Stopnitzky, 2017) -Avoid social embarrassment for not using a toilet/latrine (O'Reilly & Louis, 2014) -Avoid issues with neighbours for defecating in or near their land (O'Reilly & Louis, 2014) -Avoiding being seen defecating in the open, and avoiding the issues of going to the bushes, e.g. being bit by animals, robbers, getting faeces stolen for sorcery (Jenkins & Curtis, 2005) Washing hands or body -Avoiding disease/contamination, avoiding bad smell (Curtis, Danquah, & Aunger, 2009) -Being accepted/approved by others (including children not being bullied by others for smelling bad) (Scott et al, 2007); avoiding rejection for bad smell, or being called dirty (Scott et al, 2007) -Sexual attractiveness (Aunger et al, 2010;Curtis et al, 2009) observed but it is unclear how well other guidelines were followed (e.g.…”