Table 3.

Studies that included social media features from the different categories.

SMFa categories	Studies’ references
Communication	[3,5,14-141]
Peer grouping	[3,5,7,8,14,15,19,26,29-32,34,35,38,46,49,50,55,57,58,60,66,67,69,73,76,80,82,83,85,87,89,91,92,97,104-106,110,112, 113,118,121,124,126,127,129,130,133,139-147]
Data sharing	[3,14,19,26,31,32,34,38,41-43,46,49,54-57,59,60,72,73,76,80,81,85,92,97,103-106,110,112,118-120,126,127,133,138,146,148-150]
Competition	[3,5,7,8,15,19,38,39,42,46,49,50,54,57,67,87,91,98,104,109,112,118,133,142,151,152]
Activity data viewing	[3,5,7,8,14,19,26,27,29-32,34,38,39,46,49,50,54,55,57,58,60,66,67,73,76,80-83,85,87,91,92,97,103-105,126,127,129,130,133, 142-145,147-149,151,152]
Online social network	[3,5,14,15,19,26,29-32,35,46,49,55,57,58,60,67,69,76,80,83,85,91,92,97,104,105,114,118,126,129,130,133,138,140,141,143-145]
Identity representation	[3,5,14,15,19,26,29-32,35,38,40,46,49,50,54-58,60,67,76,80,82,83,85,91,92,97,98,104,105,126,129,130,134,140,141]

^aSMF: social media features.