Table 1. Table of definitions based on the barrier analysis approach and adapted for this study.

Key term	Definition
Target Behaviour	Handwashing with soap
Priority groups	Mothers of children under the age of five
Details of behaviour	Handwashing with water and soap at critical times.
	Critical times defined as 1) before preparing food, 2) before eating, 3) before feeding a child, 4) after using the toilet and 5) after cleaning a child’s bottom.
Perceived self-efficacy	An individual's belief that he/she can wash their hands with soap given his/her current knowledge and skills.
Perceived social norms	The perception that people important to an individual think that he/she should wash their hands with soap.
Perceived positive consequences	The positive things a person thinks will happen as a result of handwashing with soap.
Perceived negative consequences	The negative things a person thinks will happen as a result of handwashing with soap.
Access	The availability of the needed products or services (e.g. soap, water, handwashing facilities) required for handwashing with soap. This includes barriers related to the cost, distance, and cultural acceptability of these products and services.
Cues to action / reminders	The presence of reminders that help a person remember to wash their hands with soap.
Perceived susceptibility	A person's perception of how vulnerable or at risk they are to getting diarrhoea.
Perceived vulnerability	The extent to which a person believes that the diarrhoea is a serious illness.
Perceived action efficacy	The extent to which a person believes that by practicing handwashing with soap they will be able to avoid getting diarrhoea.
Perceived divine will	The extent to which a person believes that it is God’s will (or the gods’ wills) for him/her to get diarrhoea and/or to overcome it.
Policy	The presence of laws and regulations that may affect whether people wash their hands with soap or which affect their access to relevant products and services.
Culture	The extent to which local history, customs, lifestyles, values, and practices may affect whether people wash their hands with soap.