Table 4.

Contribution of each article or report to the eight themes.

Article	Are data private or public?	Consent—should users be asked?	Anonymity	Weighing harms against benefits	Research for public benefit	Legal concerns and site T&Cs	Governance of data, annotations, algorithms, and linkage	When is ethical approval needed?
Gray literature reports, recommendations, and guidelines
AoIR recommendations (37)	X			X				X
ESOMAR guideline on Social Medial Research (38)		X	X	X	X	X
Government Social Media Research Group (39)	X	X	X	X	X
Natcen users' views (40)		X	X	X	X
Sheffield workshop (41)	X	X	X	X		X
Townsend and Wallace Aberdeen (42)	X	X	X	X		X
Wisdom of the crowd (43)		X
Academic literature comprising commentaries, editorials, tutorials, and recommendations
Ahmed et al. (book chapter) (44)	X	X		X		X		X
Azam (45)	X	X
Azer (46)		X		X
Benton et al. (47)	X		X				X	X
Bica and Anderson (48)	X	X	X	X		X
Boyd and Crawford (49)		X						X
Chiauzzi and Wicks (50)		X	X			X	X	X
Conway (51)		X	X	X
Conway and O'Connor (52)		X		X
Conway et al. (12)			X		X			X
Denecke (53)			X
Farnan (54)				X
Goodyear (55)								X
Gustafson and Woodworth (56)	X	X	X	X
Hammer (57)		X
Hunter et al. (58)	X	X	X	X
Lafferty and Manca (59)		X	X					X
Li (60)		X		X
McKee (61)		X	X				X
Moreno et al. (62)	X
Moreno et al. (63)	X		X					X
Norval and Henderson (64)	X
Ravoire et al. (65)			X
Schneble et al. (66)	X
Sharkey et al. (67)	X		X
Smith and Milnes (68)			X
Spriggs (69)	X	X	X
Sugiura et al. (70)	X	X	X
Swirsky et al. (71)	X
Taylor and Pagliari (72)	X
Taylor et al. (73)								X
Valente and Pitts (74)			X	X
Vayena et al. (75)	X
Weigmann (76)								X
Williams et al. (77)	X		X			X	X
Wongkoblap et al. (78)								X
Studies of social media users' views
Bond et al. (33)		X	X		X
Mikal et al. (34)	X	X	X		X
Monks et al. (35)	X	X	X		X
Moreno et al. (36)	X	X			X