2019 Development and validation protocol

After domain specification and item development, items were assessed for both
content and face validity. Retained items are being asked in surveys in 28 sites globally in which waterrelated problems have been reported (eg, shortages, excess water and issues with quality), with a target
of at least 250 participants from each site. Scale development will draw on analytic methods from both
classical test and item response theories and include item reduction and factor structure identification.