Overuse of mobile phones may be associated with negative outcomes on mental and physical health, in addition to having an impact on how users interact socially. Furthermore, a 2011 study showed • 70% check their phones in the morning within an hour of getting up; • 56% check their phones before going to bed; • 48% check their phones over the weekend; • 51% constantly check their phones during vacation; and • 44% reported they would feel very anxious and irritable if they did not interact with their phones within a week. This change in style from face-to-face to text-based conversation has also been observed by American psychologist
Sherry Turkle. Her work cites connectivity as an important trigger of social behavior change regarding communication; therefore, this adaptation of communicating is not caused only by the phone itself. Turkle also argues that people now find themselves in a state of "continual co-presence" where digital communication allows the occurrence of two or more realities in the same place and time. Subsequently, they also live in a "world of
continual partial attention," the process of paying simultaneous attention to a number of sources of incoming information, but at a superficial level. According to Elliot Berkman, a psychology professor at the University of Oregon, the constant checking of phones is caused by reward learning and the
fear of missing out (FOMO). Berkman explains that, "Habits are a product of reinforcement learning, one of our brain's most ancient and reliable systems," and therefore people tend to develop habits of completing behaviors that have rewarded them in the past. For many, using a mobile phone has been enjoyable in the past, due to the reinforcing positive feelings when receiving and responding to a notification. Berkman also iterates that people often check their smartphones to relieve the social pressure they place upon themselves to never miss out on exciting things. As Berkman says, "Smartphones can be an escape from boredom because they are a window into many worlds other than the one right in front of you, helping us feel included and involved in society." Other implications of cell phone use in mental health symptoms were observed by Thomée et al. in Sweden. This study found a relationship between report of mental health and perceived stress of participants' accessibility, which is defined as the possibility to be disturbed at any moment of day or night. Critics of smartphones have especially raised concerns about effects on youth, in particular isolation, and its effects on social and emotional development. The presence of smartphones in everyday life may affect social interactions amongst teenagers. Present evidence shows that smartphones are not only decreasing face-to-face social interactions between teenagers, but are also making them less likely to talk to adults. In a study produced by Doctor Lelia Green at Edith Cowan University, researchers discovered that "the growing use of mobile technologies implies a progressive digital colonization of children's lives, reshaping the interactions of younger adults." Face-to-face interactions have decreased because of the increase in shared interactions via social media, mobile video sharing, and digital instant messaging. Critics believe the primary concern in this shift is that the youth are inhibiting themselves of constructive social interactions and emotional practices. Social media has changed how people communicate with each other. Nowadays, how we interact and process information is completely different. A huge worry that people have is that kids' attention spans are much shorter, and they believe that it's because of social media. Over 90 percent of teachers have had concerns about students' mental health over the past few years. The access to social media and communication on multiple devices has screen time taking over. A survey was conducted by the National Education Association of nearly 3,000 members working in school classrooms from kindergarten through twelfth grade. The survey shows that the top contributing factors to concerns of mental health include personal device use and social media. The survey also highlighted that teachers are increasingly worried about how social media affects students' ability to focus, communicate, and build interpersonal skills. Many educators feel that excessive screen time and dependency on personal devices are not only contributing to behavioral challenges but also classroom disruptions. They point out that constant online interactions can lead to heightened anxiety and lowered resilience, as students struggle to balance their digital and real-world experiences. Constant use of one's phone has been shown to cause people to even create their own interruptions by constantly checking things like text messages and emails, even to the degree of hearing their phone or feeling it vibrate when there have been no alerts made in reality. By constantly seeing the glamorous lives that people on the internet perpetuate of themselves, more viewers of such media are led to be less happy with their lives, have increased feelings of jealousy, and also have lowered self-esteem. Overall, the pervasive influence of social media and screen time is deeply impacting students' mental health, attention spans, and ability to form meaningful, real-world connections, leaving educators increasingly concerned about the long-term effects on both learning and well-being. Other studies show a positive social aspect from smartphone use. A study on whether smartphone presence changed responses to
social stress involved 148 males and females around the age of 20. Exposed to a social-exclusion stressor and measuring levels of
alpha-amylase (sAA) stress hormone, the results showed higher levels of sAA and
cortisol in the group without no phone access, suggested that the presence of a smartphone, even if it's not being used, can decrease the negative effects of
social exclusion. Other research has found a high risk of transmitting such bacteria by medical staff who carry their cellphones during their shift, because cellphones act as a reservoir where the bacteria can thrive.
Health The
International Agency for Research on Cancer stated in 2011 that
radio frequency radiation (RF) is a
possible human carcinogen, based on limited evidence of an increased risk of developing
glioma tumors. In 2018 the US National Toxicology Program (NTP) published the results of its ten-year, $30 million study of the effects of radio frequency radiation on laboratory rodents, which found 'clear evidence' of malignant heart tumors (schwannomas) and 'some evidence' of malignant gliomas and adrenal tumors in male rats. In 2019, the NTP scientists published an article stating that RF scientists found evidence of 'significant' DNA damage in the frontal cortex and hippocampus of male rat brains and the blood cells of female mice. In 2018 the Ramazzini Cancer Research Institute study of cell phone radiation and cancer published its results and concluded that "The RI findings on far field exposure to RFR are consistent with and reinforce the results of the NTP study on near field exposure, as both reported an increase in the incidence of tumors of the brain and heart in RFR-exposed Sprague-Dawley rats. These tumors are of the same histotype of those observed in some epidemiological studies on cell phone users. These experimental studies provide sufficient evidence to call for the re-evaluation of IARC conclusions regarding the carcinogenic potential of RFR in humans." Research has shown that diminished quantity and quality of sleep could also be due to an inhibited secretion of melatonin. In 2014, 58% of
World Health Organization countries advised the general population to reduce radio frequency exposure below heating guidelines. The most common advice is to use hands-free kits (69%), to reduce call time (44%), use text messaging (36%), avoid calling with low signals (24%), or use phones with low
specific absorption rate (SAR) (22%). In 2015 Taiwan banned toddlers under the age of two from using mobile phones or any similar electronic devices, and France banned
Wi-Fi from toddlers' nurseries. As adoption increases, accompanying behavioral health issues and problematic usage patterns become more apparent. Mobile phones continue to become more multifunctional and sophisticated, which exacerbates the problem. In 2014 the BBC reported concerns from opticians regarding blue-violet light emitted by cell phone screens, that it may be potentially hazardous to the eye and long term it may possibly increase the risk of
macular degeneration. The position of the American Macular Degeneration Foundation is that the evidence for this risk, considering the relatively low intensity emitted by device screens, is inconclusive at best.
Education and economic outcomes Researchers found in a 2025 study in which they were able to control for various factors that led to mobile phone usage found that college students who spent more time gaming on their mobile phones got substantially worse grades and worse future earnings than students who spent less time gaming.
Psychological There are concerns that some mobile phone users incur considerable debt, and that mobile phones are being used to violate privacy and harass others. In particular, there is increasing evidence that mobile phones are being used as a tool by children to
bully other children. There is a large amount of research on mobile phone use, and its positive and negative influence on the human's psychological mind, mental health and social communication. Mobile phone users may encounter stress, sleep disturbances and symptoms of depression, especially young adults. Avid adolescent smartphone users are spending so much time on the devices that they forgo face-to-face human interaction, which is seen as essential to mental health: "The more time teens spend looking at screens, the more likely they are to report symptoms of depression." Twenge also notes that three out of four American teens owned an iPhone, and with this rates of teen depression and suicide have skyrocketed since 2011 following the release of the iPhone in 2007 and the iPad in 2010. Addiction to technology has deterred neurological and relationship development because mobile technology is being introduced to people at a very young age. Colier states: "Without open spaces and downtime, the nervous system never shuts down—it's in constant fight-or-flight mode. We're wired and tired all the time. Even computers reboot, but we're not doing it." A survey done by a group of independent opticians revealed that 43% of people under the age of 25 experienced anxiety or even irritation when they were not able to access their phone whenever they wanted.
Neural There has been considerable speculation about the impact problematic mobile usage may have on cognitive development and how such habits could be 'rewiring' the brains of those highly engaged with their mobiles. Research has shown that the reward areas of the brains of those who use their phones more exhibit different structural connectivity than those who use their phones less. For example, some meta-analytic research has reported structural and functional neural correlates of excessive smartphone use, including reduced brain volumes and altered activations in regions supporting cognitive processes, though researchers note that most findings are observational and cannot determine causality.
Distracted driving US statistics show over 8 people are killed and 1,161 injured daily due to distracted driving. At any given daylight moment in the US, approximately 660,000 drivers are using cell phones or electronic devices while driving. According to the
National Highway Traffic Safety Administration, drivers between the ages of 16 and 24 were most distracted, with women at greater risk of dying in a crash. About 20,000 of motor vehicle fatalities between 2012 and 2017 were related to distracted driving. There is currently no US federal ban on texting while driving, but several states as well as Washington D.C., Puerto Rico, and the U.S. Virgin Islands have passed laws prohibiting the use of hand-held devices while driving. A text can take one's eyes off the road for an average of five seconds. Although brief, at a vehicle travels or just over the
length of a football field in that time. A 2021 national study conducted by the
United States Department of Transportation found that approximately three percent of drivers were talking on the phone when stopped at an intersection, and estimated that at any point in time about five percent of drivers are on the phone. The
Insurance Institute for Highway Safety (IIHS) also reported that cell phone users tended to brake harder, drive faster, and change lanes more frequently, predisposing them to crashes and near-crashes; they are two to six times more likely to be involved in accidents. Research indicates cell phone use adversely affects driver performance, delaying reaction time, increasing lane deviations, and decreasing time spent observing the road. It can also increase "inattention blindness" in which drivers see but do not register what is in front of them. Teen drivers are especially at risk; distractions such as music, games, GPS, and social media are potentially deadly when combined with inexperience. The dangers of driving and multitasking continue to rise as more technology is integrated into cars. Teens who texted more frequently were less likely to wear a seat belt and more likely to drive intoxicated or ride with a drunk driver. Cell phone use can affect young drivers' abilities to control vehicles, pay attention to the roadway, and respond promptly to traffic events. == Positive effects ==