Table 2.

Eligibility criteria

Criterion	Inclusion	Exclusion	Justification
Population and sample	Humans	Any study population other than humans, that is, animal studies	Referring to CBPR partnerships between humans.
Language	Written in English	Any other language that is not in English	Reviewers only speak English.
Time period	1995–2020	Outside this time period	Still able to capture a wide breadth of literature within the time when CBPR research became more prominent and defined by the pioneers in the field. Our definition of CBPR is consistent with that defined by Green and colleagues1
Study focus	(1) Articles that discuss participatory health research and trust OR (2) Articles that discuss social networks and trust	(1) Must be participatory health research, not other forms of participatory research outside of the health context OR (2) Social networks across a variety of disciplines, excluding those with a sole focus on online social networks using platforms such as Facebook, Instagram and Twitter, with no reference to conceptualising (operationalising or measuring) trust in a relational context	One key reason participatory research was developed, historically, was to address inequities related to health. Ensuring continuity in conceptualisations from the literature to inform the formation of a conceptual framework for participatory health research. In our study context, and the context of CBPR more generally, interactions and partnership building are usually about interpersonal face-to-face contact and communication, which is not adequately reflected in social media networks, such as Facebook and Twitter. Online social network platforms (like those above) are looking at social phenomenon unrelated to the type of interactions we are interested in uncovering (such as, creating online trust communities, where people share thoughts and opinions with others they may not know, or have had a face-to-face interaction with).32
Type of article	Peer reviewed journal articles or reviews and grey literature. Specifically, grey literature will include theses/dissertations, reports, conference proceedings, editorials and chapters in a textbook.	Any other literature that is not listed in the inclusion criteria, such as websites.	Scoping reviews aim to capture more than peer reviewed and published literature in order to expansively explore a broad research question. Preliminary searches of grey literature generally revealed those listed in our inclusion criteria. Acknowledging feasibility and time constraints, we felt the literature criteria listed would be sufficient in capturing the necessary literature to inform our review and ultimately, a conceptual framework.
Geographic location	Any location—an international context.	None	Participatory research has applications globally.

CBPR, community-based participatory research.