Table 3.

Data collection methods and instruments

Data collection method	Goal of method	Development of instrument
IDI with caregivers	Explore POUWT behaviors, how they have changed over time, and what factors motivate or impede the changes	Informed by behavior change continuum and IBM-WASH; modified based on input from FWs and community members
Indirect observation	Assess products in home as proxy for behaviors and evaluate access to resources	Informed by observations of community members and bodegas before formal data collection, and surveys from larger cohort study
Focus group discussion	Validate interpretation of themes arising from analysis of IDIs	Created during iterative process of data collection and analysis
Interview with health sector staff	Gather supplemental information on current and past health sector interventions for chlorination	Questions emerged in response to themes mentioned during IDIs

FWs = field workers; IBM-WASH = Integrated Behavioral Model for Water, Sanitation, and Hygiene; IDI = in-depth interview; POUWT = point-of-use water treatment.