“…Some studies investigated the effects of cell phone use in comparison with other secondary tasks, such as talking to a passenger (two studies: [49,69]), eating (four studies: [56,57,70,71]), radio tuning (five studies: [67,69,[72][73][74]), using navigation systems (three studies: [33,58,74]), taking pictures [75] or selfies [76], adjusting climate control [72], reading emails (three studies: [55,63,77]), drinking [29], watching video and using social media [63], switching display view and searching songs [55], and sharing numbers [76]. Other studies compare phone use with other types of devices, such as the smartwatch (three studies: [36,68,78]) and Google Glass (two studies: [54,79]). Moreover, instead of using the phone for texting, some researchers used smartphones to perform tasks on social media, such as using Facebook (three studies: [20,80,81]), Snapchat, Instagram [82], Whatsapp [83], or some self-developed applications [60,84].…”